Cisco Systems Modem AS5850 User Manual

C H A P T E R  
1
Cisco AS5850 Product Overview  
The Cisco AS5850 is a high-density, ISDN and modem WAN aggregation system that provides both  
digital and analog call termination. It is intended to be used in service provider dial point-of-presence  
(POP) or centralized enterprise dial environments.  
The gateway components include hybrid trunk and port-handling cards (both functions are handled by  
different components in the same slot), dedicated port-handling cards, dedicated trunk cards, route  
switch controllers, power entry modules, and a blower unit to cool the chassis. An optional 2400W AC  
power shelf is also available. The gateway is designed with environmental monitoring and reporting  
functions to help maintain normal system operation and resolve adverse environmental conditions prior  
to loss of operation. If conditions reach critical thresholds, the system shuts down to avoid equipment  
damage from excessive heat or electrical current.  
Downloadable software and microcode allow you to load new software images into Flash memory  
remotely, without having to physically access the universal gateway, for fast and reliable upgrades.  
This chapter provides physical and functional overviews to familiarize you with your new  
Cisco AS5850. The chapter also contains physical descriptions of system hardware and major  
components and functional descriptions of component features.  
Note  
Descriptions and examples of software commands appear in this document only when they are  
necessary for installing the system hardware. For software configuration information, refer to the  
Cisco AS5850 Universal Gateway Commissioning Guidelines that shipped with your system, or the  
Cisco AS5850 Universal Gateway Operation, Administration, Maintenance, and Provisioning  
Products and Services > Universal Gateways > Cisco AS5800 Universal Gateways  
This chapter contains the following sections:  
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Chapter 1 Cisco AS5850 Product Overview  
System Components  
Figure 1-1 Cisco AS5850 with 2400W AC-Input Power Shelf—Front View  
Power LED  
Fault LEDs  
Power  
Fault  
Cooling module  
Captive screws  
Bank  
1
Ba  
nk  
2
Bank  
3
LOOP  
LOOP  
LOOP  
LOOP  
RCVR  
RCVR  
RCVR  
RCVR  
XMTR  
LOS  
XMTR  
LOS  
XMTR  
LOS  
XMTR  
LOS  
T3 ENABLE/DISABLE  
T3 ENABLE/DISABL  
E
R
T3 ENABLE/DISA  
BLE  
X
T3 ENABL  
E/DISABLE  
X
RA  
LA  
MA  
RA  
LA  
MA  
R
R
X
X
T
X
T
X
RA  
LA  
MA  
RA  
T
X
T
X
LA  
MA  
SERIAL  
SERIAL  
SERIAL  
ACT  
SERIAL  
ACT  
SERIAL  
SERIAL  
SERIAL  
ACT  
SERIAL  
ACT  
FCPU  
FCPU  
FCPU  
FCPU  
CPU/POWER  
CPU/POWER  
CPU/POWER  
CPU/POWER  
CPU/POWER  
CPU/POWER  
CPU/POWER  
CPU/POWER  
CPU/POWER  
CPU/POWER  
14-slot card cage  
(Line, port, and  
RSC cards installed)  
CALLS/MAINT  
CALLS/MAINT  
CALLS/MAINT  
CALLS/MAINT  
CALLS/MAINT  
CALLS/MAINT  
CALLS/MAINT  
CALLS/MAINT  
CALLS/MAINT  
2
CALLS/MAINT  
261UNIVESALPOR  
342UNIVESALPOR  
342UNIVESALPOR  
342UNIVESALPOR  
CAHNLIZEDT3  
CAHNLIZEDT3  
261UNIVESALPOR  
261UNIVESALPOR  
342UNIVESALPOR  
342UNIVESALPOR  
342UNIVESALPOR  
CAHNLIZEDT3  
CAHNLIZEDT3  
+
T
+
TS  
T
S
T
T
S
S
S
+
T
+
TS  
TS  
T
TS  
S
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
PORT ST  
ATUS  
Cool air intake  
Route switch  
controller (RSC) cards  
Chassis installation  
support bracket  
DC OK AC  
OK FAUL  
T
DC OK AC  
OK FAUL  
T
DC OK AC  
OK FAUL  
T
2400W AC-input power shelf (optional)  
Note  
Figure 1-1 shows a system with two RSCs and a split backplane, and both sides supporting T3  
connections. This is shown to illustrate full configurations on a split backplane.  
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Chapter 1 Cisco AS5850 Product Overview  
Functional Overview  
Figure 1-2 Cisco AS5850 with AC-Input Power Shelf—Rear View  
Warm air  
exhaust  
POWER  
POWER  
MISWIR  
E
MISWIR  
E
PEM  
C
O
M
C
O
M
N
C
N
O
N
C
N
O
+
+
AC power supply  
monitor cables  
DC interconnect  
cables  
Ground cable  
2400W AC-input  
power shelf  
AC connection  
cables  
Functional Overview  
The Cisco AS5850 supports high-density dial aggregation and integrates with the Cisco AS5350 and  
Cisco AS5400 universal gateways for scaling your service provider network.  
The Cisco AS5850 universal gateway also supports high availability of service through online insertion  
and removal (OIR) capabilities and redundant power modules that are hot swappable. All active  
components within the chassis support OIR, which allows components to be removed or replaced while  
the system is powered on. Feature cards can be busied-out through the software to avoid loss of calls.  
The Cisco AS5850 is compatible with the Cisco Universal Gateway Manager (UGM) network  
management software. For more on Cisco UGM, see the “Network Management” section on page 1-8.  
The Cisco AS5850 supports Channelized T1, E1,T3 PRI, and STM1 ingress interfaces that terminate  
ISDN and modem calls at DS0 granularity. Digital calls are terminated onboard the trunk card, and  
analog calls are sent to port handling resources on the same card or on other feature cards. As a result,  
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Chapter 1 Cisco AS5850 Product Overview  
Functional Overview  
any DS0 can be mapped to any HDLC controller or universal port. You can install multiple ingress  
interface cards of like types and configure the Cisco AS5850 for card or port level redundancy,  
depending on your needs.  
Trunk and port handling cards are tied together using several time-division multiplexing (TDM) buses  
on the backplane. Each line card is also connected, through point-to-point packet buses, to a central  
switch on the Route Switch Controller (RSC) cards. The RSC cards transmit and receive packetized data  
across the IP network.  
The Cisco AS5850 supports a split backplane configuration by using two RSC cards. In the classic-split  
configuration, the system operates as two separate universal gateways with each RSC controlling its own  
set of feature cards. In the handover-split mode, if one RSC fails, the other RSC takes control of the  
failed RSC’s feature cards so their operation can continue. In the route processor redundancy (RPR+)  
mode, one RSC acts as the active RSC that controls all the resources in the chassis. The other RSC is the  
standby RSC and assumes control of the chassis if the active RSC fails. RPR+ enables a much faster  
switchover than handover-split mode. For more information about the split backplane configuration,  
The RSC card also provides clock and power control to the feature cards. Each RSC card contains a block  
of logic, referred to as the common logic, and system clocks. This block generates the backplane 4-MHz  
and 8-KHz clocks used for interface timing and for the TDM bus data movement. The common logic can  
use a variety of sources to generate the system timing, including a BITS input signal from the BNC  
connector on the RSC front panel. The clock source can also be telco office timing units extracted from  
the network ingress interfaces.  
On the RSC card, only one common logic is active at any one time, which is identified by the CLK  
(clock) LED on the RSC card front panel. The active common logic is user-selectable and is independent  
from each RSC. This assures that if an RSC card needs replacing or if the slave RSC card becomes the  
master, clocking remains stable. The selected common logic should not be changed during normal  
operation unless related hardware failure is suspected or diagnosed.  
You can install and upgrade software remotely, without affecting current system operation. You can also  
upload and download configuration files remotely, without affecting current system operation. Remote  
access is enabled by use of simple network management protocol (SNMP), by a Telnet session to a  
console port on the router shelf, through the World Wide Web (WWW) interface, or through use of the  
optional network management software.  
The Cisco AS5850 can dynamically adjust any port to support any user configuration. Individual users  
can be authenticated as they connect to the system by use of one or more authentication servers using  
RADIUS and TACACS+ authentication protocols. Primary and backup authentication servers can define  
user authentication parameters using the user domain and the number called. User profile information  
can also be configured to include time of day, number of simultaneous sessions, and number of  
B-channels used.  
When a remote user connects to the universal gateway using a modem or an ISDN line, the user is  
authenticated and establishes a session. Dynamic address assignment from an authentication server or  
static address assignment connects the user and has virtually no impact on service provider routing  
tables.  
A remote LAN user can connect to the universal gateway using an ISDN line or asynchronous serial  
connection, be authenticated, and establish a session. In addition to dynamic or static address  
assignment, this connection requires the traditional Cisco IOS software support for different routing  
protocols on different ports simultaneously, with virtually no impact on service provider routing tables.  
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Functional Overview  
A dial wholesale customer can connect to a Cisco AS5850, then tunnel PPP (Point-to-Point Protocol)  
packet information to a retail service provider using dial Virtual Private Network (dial VPN).  
For detailed system specification tables, refer to Appendix A, “Cisco AS5850 Specifications.”  
Traffic Flow  
Figure 1-3 shows inbound connection flow for the Cisco AS5850.  
Figure 1-3 Inbound DS0 Traffic Flow  
Backplane  
Cisco AS5850  
universal gateway  
2
OC3/STM-1  
SMF  
T1/E1  
CAT5  
T3  
COAX  
Backbone  
Network 1  
Backbone  
Network 0  
(Gigabit Ethernet) (Gigabit Ethernet)  
1
Modem  
Twisted pair  
A typical user connection flows as follows:  
1. The user PC connects to an attached or internal modem.  
2. The modem call connects to a central office (circuit switched) and is multiplexed into a T1/E1, T3,  
or STM1 trunk.  
3. The T1, E1,T3, or STM1 interface is terminated, and individual serial DS0s are sent to port-handling  
hardware and software. Universal ports may be located in the same physical slot, as part of a hybrid  
trunk card, or in a universal port card (UPC). (See Figure 1-3.)  
4. Universal ports interface with modem protocols and convert TDM data into Ethernet packets.  
5. Ethernet packets are routed and send out through the Fast Ethernet or gigabit Ethernet egress  
interfaces to a backbone network.  
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Power Flow  
Figure 1-4 shows how power is distributed to various universal gateway field-replaceable units.  
Figure 1-4 Power Distribution  
Cisco AS5850  
universal gateway  
Backplane  
GigE egress  
-48 VDC 50A  
RSC  
-48 VDC 50A  
Cooling  
module  
-48 VDC  
-48 VDC  
PEMF 1  
PEMF 2  
-48 VDC 50A  
-48 VDC 50A  
PS 3  
2400W AC-input  
power shelf  
(optional)  
PS 1  
PS 2  
120/240 VAC 15A  
120/240 VAC 15A  
120/240 VAC 15A  
Note  
VDC output of the 2400 W AC power shelf is set at -51 volts DC.  
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Functional Overview  
Network Management  
The Cisco Universal Gateway Manager (Cisco UGM) configures and manages fault, performance, and  
security of the Cisco AS5850. Cisco UGM is a UNIX-based solution that can be run from a Cisco  
Element Management Framework (EMF) server, and also provides the following features:  
FaultDevice and port-specific alarm frequency and severity information. The fault management  
GUI supports point-and-click alarm acknowledgement and clearing functions, and trap forwarding.  
ConfigurationConfiguration services for the managed devices and their components. As objects  
are configured or modified, the Cisco UGM database is automatically updated to reflect the current  
configuration of the network.  
PerformanceCollects performance information from each managed device and its components.  
This information allows you to monitor the network by viewing and graphing performance data  
associated with an object.  
SecuritySupports role-based access to its management functions. The user administrator defines  
user groups and assigns users to these groups, and also supports control of administrative state  
variables for Cisco UGM resources.  
Figure 1-5 shows the flow of system management information for the Cisco AS5850.  
Figure 1-5 System Management Information Flow  
Network management software or terminal  
Cisco AS5850  
universal gateway  
GigE or FE ports  
RSC  
trunk card  
Backplane  
universal port card  
Cooling  
module  
PEMF 1  
PEMF 2  
2400W AC-input power shelf  
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Cisco AS5850 Chassis  
Cisco AS5850 Chassis  
The Cisco AS5850 contains 14 slots (numbered 0 through 13 on the backplane) and can support trunk  
cards and universal port cards in slots 0 through 5 or 8 through 13. Slots 6 and 7 in the chassis are  
dedicated slots for the RSCs. There are two versions of the RSC, RSC and ERSC. ERSC has a faster  
CPU, more memory, and two Fast Ethernet ports. Metal guard pins on the backplane module prevent you  
from installing any other type of card in these two slots. The modular chassis supports online insertion  
and removal (OIR) and redundant power and includes environmental monitoring and feedback control.  
Table 1-1 shows the possible trunk card configurations for RSC:  
Table 1-1 Maximum Number of Trunk Cards for RSC  
Total  
Trunk  
Cards Per 324-port  
Total  
DS0s  
with  
RSC  
Total  
Ports  
with  
RSC  
Total  
Chassis Trunk Type  
24T1 only  
First RSC  
2 24T1  
2 T3  
Second RSC Chassis  
UPC  
2 24T1  
2 T3  
4
4
4
4
8
6
7
8
2304  
2688  
2496  
2496  
2592  
2808  
2700  
3024  
T3 only  
24T1/T3 combination  
24T1/T3 combination  
2 24T1  
2 T3  
1 24T1,  
1 T3  
1 24T1,  
1 T3  
24T1/T3 combination  
24T1/T3 combination  
1 24T1,  
1 T3  
2 T3  
4
4
7
8
2592  
2400  
2916  
2808  
2 24T1  
1 24T1,  
1 T3  
24E1 only  
2 24E1  
1STM1  
2 24E1  
2 24E1  
4
2
3
8
2880  
4032  
3456  
2592  
3240  
2916  
STM1 only  
1 STM1  
1 STM1  
10  
9
24E1/STM1  
combination  
Table 1-2 shows the possible trunk card configurations for ERSC:  
Table 1-2 Maximum Number of Trunk Cards For ERSC  
Non-Split Chassis  
Total  
Split Chassis  
Total  
Total  
DS0s  
Total  
Ports  
with  
Total  
DS0s  
Total  
Ports  
with  
Chassis  
Trunk  
Type  
Trunk  
Total  
Trunk  
Total  
Cards Per 324-port with  
Cards Per 324-port with  
Chassis  
UPC  
ERSC  
2880  
3360  
2880  
3780  
ERSC  
Chassis  
UPC  
ERSC  
1152  
1344  
1440  
1890  
ERSC  
24T1  
T3  
5
5
4
2
7
2268  
3348  
2592  
3240  
2
2
2
1
4
3
4
5
1296  
1404  
1296  
1620  
7
24E1  
STM1  
8
10  
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Cisco AS5850 Chassis  
Table 1-2 Maximum Number of Trunk Cards For ERSC (continued)  
Non-Split Chassis  
Total  
Split Chassis  
Total  
Total  
DS0s  
Total  
Ports  
with  
Total  
DS0s  
Total  
Ports  
with  
Chassis  
Trunk  
Type  
Trunk  
Total  
Trunk  
Total  
Cards Per 324-port with  
Cards Per 324-port with  
Chassis  
UPC  
ERSC  
ERSC  
Chassis  
UPC  
ERSC  
ERSC  
24T1/T3  
combination 2 T3  
3 24T1  
7
3072  
2700  
3240  
1
1
1248  
1512  
24E1/STM1 1 STM1  
2 24E1  
7
3330  
Note  
Mixing CT1 or CT3 and CE1 or STM1 in the same chassis is not supported. If this  
configuration guideline is violated, an error message appears on the RSC and the disallowed  
card is shut down.  
The universal gateway uses CT1, CE1, CT3, or STM1 trunk interfaces that terminate ISDN and modem  
calls and break out individual calls from the appropriate telco services. Digital calls are terminated on  
the trunk card high-level data link control (HDLC) controllers, and analog calls are terminated on the  
universal ports on the trunk card, if available, or universal ports on another feature card. As a result, any  
DS0 can be mapped to an onboard HDLC controller or any universal port. You can install multiple  
ingress interface cards, which enables you to configure your systems as fully operative, port redundant,  
or card redundant, depending on your specific needs.  
Clock Management  
The RSCs also provide clock and power control to the feature cards. Each RSC contains a block of logic,  
referred to as the common logic, and system clocks. This block of logic can use a variety of sources to  
generate the system timing, including a T1, E1,T3, STM1, or BITS input signal (accepts only T1 or E1)  
from the BNC connector on the RSC front panel.  
Only one common logic circuit is active at any one time, which is identified by the CLK (clock) LED on  
the RSC front panel. The active common logic is user-selectable and is independent from each RSC. This  
ensures that if an RSC needs replacing or if the slave RSC becomes the master, clocking remains stable.  
The selected common logic should not be changed during normal operation unless related hardware  
failure is suspected or diagnosed.  
The configuration commands for the master clock specify the various clock sources and a priority for  
each source. Together these commands define a list, ordered by priority, of the clock sources used to  
generate the master clock. The prioritized list, configured on the router shelves, is passed to and stored  
by the RSC providing the active clock. In the event of failure of the highest-priority clock source, the  
RSC switches to the source with the next-highest priority.  
With a split backplane, the clock sources can be configured on either of the RSCs. Typically a router  
configures clock sources only from the slots that it owns; clock sources can be configured from other  
slots, but they are ignored. On the universal gateway, all valid clock source configurations need to be  
known to the RSC providing the clock, including the clock source configurations on the other RSC.  
An error condition can arise if a clock input on one RSC is configured to have the same priority as a  
clock input configured on the other RSC. However, the command is not rejected, because the values  
configured on the other RSC may not be known. Warning messages are issued to both RSCs when this  
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Cisco AS5850 Chassis  
condition is detected. Two clock inputs specified with identical priorities both go into the ordered list of  
clock sources, but the one received first by the RSC providing the active clock is assigned a higher  
priority.  
The show chassis clocks command shows all configured clock sources, even those from un-owned trunk  
cards. Only one RSC can provide the master clock; however, backup clock sources might need to be  
configured for all trunk cards present (regardless of which RSC owns them).  
Note  
If you need to OIR the RSC serving as the primary clock source with a split backplane configuration,  
you will need to switch the primary clock source to the other RSC as described in Chapter 4,  
“Maintenance” in the Cisco AS5850 Operations, Administration, Maintenance, and Provisioning  
Guide, available online at:  
index.htm  
Split Backplane  
The split backplane configuration of the Cisco AS5850 platform increases bandwidth by using two  
RSCs. The dual RSCs serve as the interfaces between the split Cisco AS5850 gateway and the external  
network. Split backplane configuration requires two RSC cards. For more information on hardware and  
software configuration needed for a split backplane configuration, refer to the Cisco AS5850 Operations,  
Administration, Maintenance, and Provisioning Guide, available online at:  
index.htm  
If your gateway contains two route switch controller (RSC) cards, you can configure your Cisco AS5850  
into one of three modes: classic split, handover split, or route processor redundancy (RPR+).  
Classic-split mode (the default) maximizes system throughput by splitting slots between two RSCs.  
Each RSC controls a certain set of slots (slots 0-5 are owned by the RSC in slot 6 and slots 8-13 are  
owned by the RSC in slot 7) and operates as though slots other than those that it controls contain no  
cards, because those cards are controlled by the other RSC. Configuration on each RSC affects only  
the slots owned by that RSC. Calls on a failed RSC are lost, but calls on the functioning RSC  
continue normally. Operating a Cisco AS5850 in classic-split mode is the same as having two  
Cisco AS5850s, each with a separate set of cards.  
Handover-split mode maximizes system availability by allowing an RSC to automatically take  
control of the slots, cards, and calls of the other RSC should that other RSC fail. Each RSC is  
configured identically as appropriate for the full set of cards. During normal operation, both RSCs  
are active, handling their own slots, cards, and calls just as in classic-split mode. Should an RSC  
fail, the other RSC takes over control of the failed RSC's slots, goes into extra-load state, restarts  
the failed RSC's cards, and handles newly arrived calls on those cards—although calls on the failed  
RSC are lost at the moment of failure. The failed RSC, should it recover or be restarted, remains in  
standby state until you instruct the active RSC to hand back its newly acquired slots to the standby  
RSC. This is, in effect, split dial shelf with handover capability.  
In RPR+ mode, the standby RSC is fully initialized. The startup configuration is read, and the active  
RSC dynamically synchronizes startup and running configuration changes to the standby RSC. This  
means that the standby RSC need not be reloaded and reinitialized, and the feature cards are not reset  
if the active RSC fails. Information synchronized to the standby RSC includes startup and running  
configuration information and changes to the chassis state such as online insertion and removal  
(OIR) of hardware. After switchover, new calls are being accepted in less than one second plus route  
convergence time.  
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Cisco AS5850 Chassis  
Note  
If you need to OIR the RSC serving as the primary clock source with a split backplane configuration,  
you will need to switch the primary clock source to the other RSC as described in Chapter 4,  
“Maintenance” in the Cisco AS5850 Operations, Administration, Maintenance, and Provisioning  
Guide, available online at:  
index.htm  
OIR Events  
Split backplane configurations are managed by having the slots that are owned by one RSC appearing to  
the other RSC as empty slots. An RSC is informed of OIR events by messages that are sent to the RSC  
when a card is inserted in or removed from a slot. An RSC sends messages only for OIR events that occur  
in slots that it owns. The packet switch on each RSC is configured to ignore traffic from cards in  
un-owned slots.  
Card Bootup  
When a feature card starts running, it sends a message to the RSCs. The RSCs determine whether they  
are the master for that slot. Only the RSC that owns the slot containing the feature card responds to the  
message. The feature card accepts firmware and a bootstrap image from that RSC and configures itself  
to communicate through that RSC. The first time an RSC is inserted, it sends an inventory request  
indicating that all feature cards should be reloaded. In split backplane mode, the final feature card image  
is downloaded by each card from the RSC that owns it.  
Slot Ownership Arbitration  
The Cisco AS5850 operates in a default split backplane mode. Currently, the RSC in slot 6 automatically  
owns all cards in slots 0 through 5, and does not receive inventory messages from cards present in slots  
8 through 13. The RSC in slot 7 automatically owns all cards in slots 8 through 13, and does not receive  
inventory messages from cards present in slots 0 through 5.  
TDM Resource Allocation  
The various kinds of feature cards (FCs) that can be placed in the chassis connect to one another using  
Time-Division Multiplexing (TDM) buses in the chassis backplane. The Cisco AS5850 has a total of 4  
such buses, each bus supports 2048 DS0s, giving the backplane a total DS0 capacity of 8192 (numbered  
from 0 to 8191).  
The TDM management software on each of the RSCs controls the allocation of the backplane DS0s.  
Allocation starts with the fourth (i.e. last) backplane bus and finishes with the first. Allocation will only  
move onto a new backplane bus when all the DS0s on the currently-used backplane bus are in use. Within  
a given bus, allocation begins at the lowest DS0 and progresses to the highest DS0. Once a DS0 has been  
allocated, used and released, it is put back onto the end of a queue of DS0s for the bus to which it  
belongs. Thus, a DS0 will only be re-used when all the other free DS0s on its backplane bus have been  
used. After a long period of operation, the ordering of DS0s within a particular DS0 queue will  
effectively be random.  
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Field-Replaceable Units  
In systems with two RSCs, the way the RSC uses the backplane buses will depend on the mode the  
system is operating in. Sometimes one RSC will control all the backplane DS0s and sometimes their use  
will be divided between the RSCs.  
Environmental Monitoring  
Environmental monitoring for the full chassis is carried out by both RSCs. This means that warnings  
about overheating cards go to both RSCs, regardless of which one owns the slot. Sending the warnings  
to both RSCs reduces the chance of an environmental problem going unreported.  
For detailed chassis specification tables, refer to Appendix A, “Cisco AS5850 Specifications.”  
Field-Replaceable Units  
The Cisco AS5850 is designed to make component removal and replacement easy. This section describes  
the Cisco AS5850 field-replaceable units (FRUs).  
Table 1-3 describes available Cisco AS5850 FRUs that can be ordered as spares.  
Table 1-3 Field Replaceable Units  
Field-Replaceable Unit  
Product Number  
AS58-24CE1=  
24E1 trunk card  
24T1 trunk card  
AS58-24CT1=  
CT3/216 universal port card  
SDH/STM-1 trunk card  
AS58-1CT3/216U=  
AS58-1STM1=  
324 universal port card  
AS58-324UPC-CC=  
AS58-RSC-2GE=  
AS58-ERSC-2GE=  
DS58-BLANK=  
AS5850-CM=  
Route switch controller card (RSC)  
Enhanced route switch controller card (ERSC)  
Blank filler cards  
Cooling module  
Power entry module  
AS5850-PEMF=  
AS5850-RMK=  
Rack-mount kit  
Singlemode gigabit Ethernet module  
Multimode gigabit Ethernet module  
2400 W 120V AC-input power shelf  
AC-input single power module  
GBIC-LH-SM=  
GBIC-SX-MM=  
AS58-PWR-3AC/2400=  
AS58-PWR-3AC/MOD=  
For information about the feature cards used in the Cisco AS5850, refer to the Cisco AS5850 Universal  
Gateway Card Guide that shipped with your system. For information about other FRUs, review the rest  
of this chapter, or for detailed specification tables, refer to Appendix A, “Cisco AS5850 Specifications.”  
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Feature Cards  
For information about the feature cards used in the Cisco AS5850, refer to the Cisco AS5850 Universal  
Gateway Card Guide that shipped with your system. For information about other FRUs, review the rest  
of this chapter, or for detailed specification tables, refer to Appendix A, “Cisco AS5850 Specifications”  
Cooling Module  
The cooling module in the Cisco AS5850 monitors the internal operating temperatures and maintains  
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Boots and reloads software images  
Provides source clocks used by all feature cards and power supplies  
Provides a BITS input BNC connector  
Connects to an external alarm source through a connector located on the front panel  
Install the RSC card in the Cisco AS5850 in either slot 6 or slot 7. The card plugs directly into the  
backplane.  
The RSC card consists of the following components:  
CPU  
RSC (QED RM7000 - 250MHz)  
ERSC (Broadcom BCM1250 - 650MHZ).  
1Gigabyte of DDR memory on ERSC  
I/O controller  
Compact Flash memory card  
Boot Flash memory  
EEPROM  
NVRAM  
Packet switch ASICs  
Fast Ethernet, console, auxiliary and two Gigabit Ethernet interfaces  
For detailed specification tables, refer to Appendix A, “Cisco AS5850 Specifications.”  
Figure 1-6 shows the RSC components.  
Figure 1-6 RSC Components  
Backplane  
connector  
SDRAM  
T
IN  
IS  
IN  
IST  
H
M
H
M
S
S
U
B
BU  
M
M
R
R
W
P
PW  
Compact flash  
Gigabit Ethernet ports  
Note  
The universal gateway supports two RSCs for a redundant connection to the network backbone or for  
a split backplane configuration.  
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LED Indicators and Alarm Buttons  
The RSC front panel contains several LEDs, push buttons, LCDs, and connectors.  
Figure 1-7 and Figure 1-8 show the RSC front panel LEDs.  
Figure 1-7 RSC Front Panel  
Bell alarm terminal block  
LCD display  
MODE  
SEL  
CLK  
Push buttons  
MAST  
FLASH  
Console port  
Auxiliary port  
FE port  
Network clock  
BNC connector  
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Figure 1-8 ERSC Front Panel  
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Table 1-4 Route Switch Controller Card Front Panel LEDs (continued)  
LED Indicator  
Display  
Description  
MAINT  
Yellow  
Flashing indicates that diagnostics are  
currently running. On indicates that the RSC  
failed diagnostics or was shut down for  
removal. This LED is normally off.  
ALARM  
Yellow  
Comes on to indicate a major1 or minor2 alarm  
condition.  
Clock and Status LEDs  
MAST (master)  
CLK (clock)  
Green  
Green  
RSC is in handover-split mode.  
Comes on to identify the route switch control-  
ler card active clock; active clock is indepen-  
dent from master route switch controller card  
designation.  
FLASH  
LINK  
Green  
Green  
Comes on when compact Flash slot is in use.  
Indicates valid Ethernet link has been estab-  
lished.  
ACT  
Green  
Indicates traffic activity on the Ethernet.  
Liquid Crystal Displays  
LCDs (upper and lower)  
Alphanumeric;  
4 characters  
each  
Displays SPLT if in classic-split mode and  
HSPL if in handover-split mode.  
1. A major alarm condition includes RSC failure, backplane failure, fan failure, power module failure, feature card failure,  
or conditional environmental thresholds.  
2. A minor alarm condition includes modem SIMM failure, HDLC controller failure, trunk line failure, or conditional en-  
vironmental thresholds.  
Figure 1-7 shows the RSC front panel push buttons, Table 1-5 describes push button actions, and  
Table 1-6 describes options for those actions.  
Table 1-5 RSC Push Buttons  
Button  
Description  
MODE button  
Press repeatedly (for 0.25 seconds) to cycle through possible  
options. Hold the MODE button down (2 seconds) to select an  
option to change (option will flash when it is configurable). Press  
repeatedly (for 0.25 seconds) to cycle through possible  
parameters for that option.  
SEL button  
Press (2 seconds) to accept the displayed and flashing parameter.  
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Table 1-6 RSC Push Button Options  
Function  
Definition  
ALARM CUTOFF—When selected (YES), software should turn off any active  
ACO YES/NO  
Figure 1-7 shows the RSC front panel ports, and Table 1-7 describes the port functions.  
Warning  
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to  
telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits and WAN ports contain  
TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting  
cables. To see translations of the warnings that appear in this publication, refer to the Regulatory  
Compliance and Safety Information document that accompanied this device.  
Note  
Connect the alarm port only to a safety extra-low voltage (SELV) source using 22 AWG, or thicker, copper  
wire. SELV ratings are maximum 30 Volts AC (RMS), maximum 60 Volts DC, and maximum  
50 VA power. The alarm port is rated for 2.0 Amp maximum current.  
Common Logic Interface  
Each RSC card contains a block of logic referred to as the common logic and system clocks. This block  
generates the backplane Stratum compliant 4-MHz and 8-kHz clocks used for interface timing and for  
the TDM bus data movement. The common logic can use a variety of sources to generate this system  
timing, including a T1 or E1 signal input from the BNC connector on the RSC front panel.  
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Only one common logic is active at a time, identified by the CLK LED on the RSC card front panel. The  
active common logic is user-selectable and is independent from each RSC card. This assures that if you  
need to replace an RSC, or if the slave RSC becomes the master, clocking remains stable. The selected  
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Figure 1-9 RSC Gigabit Ethernet Egress Interfaces  
RX-SYNC  
LINK  
OPT  
-DET  
RX-FULL  
RX  
TX  
RX-SYNC  
LINK  
OPT  
-DET  
RX-FULL  
RX  
TX  
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Table 1-8 Egress Interface LEDs  
LED  
Color  
Green  
Green  
Function  
RX-SYNC  
OPT-DET  
GMAC.  
Indicates that the gigabit Ethernet port is plugged in, and  
auto-negotiation is on the remote side.  
TX  
Green  
At full rates, comes on to indicate outgoing traffic on the link. This LED  
can appear to flicker at low traffic levels.  
LINK  
Green  
Green  
Green  
RX-FULL  
RX  
At full rates, comes on to indicate incoming traffic on the link. This LED  
can appear to flicker at low traffic levels.  
Table 1-9 GBIC to Host Connector Pin Assignment  
Pin Signal  
RX_LOS  
RGND  
Pin  
1
2
RGND  
3
MOD_DEF(0)  
MOD_DEF(1)  
MOD_DEF(2)  
TX_DISABLE  
TGND  
4
5
6
7
8
TGND  
9
TX_FAULT  
RGND  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
-RX_DAT  
+RX_DAT  
RGND  
V
V
DDR  
DDT  
TGND  
+TX_DAT  
-TX_DAT  
TGND  
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Figure 1-10 GBIC Module  
DC-Input Power Entry Module  
The Cisco AS5850 is equipped with two power-entry modules (PEMFs), which accept DC-input power  
either from your site DC source or from an optional AC-input power shelf, and distribute –48 VDC to  
–60 VDC power to the chassis components using the backplane. The PEMFs provide power redundancy  
and load-sharing; however, a single PEMF can power a fully configured system. The PEMF also contains  
a passive DC power filter, which includes a broadband electromagnetic interference (EMI) filter and  
circuitry for monitoring power coming into the chassis.  
Note  
Whenever possible, you should connect each PEMF to a separate DC power source.  
The PEMFs are cooled by system airflow, which flows from the top to the back of the chassis. The front  
and sides of the PEMFs are perforated for minimum airflow restriction.  
The PEMFs support the following functions:  
Power redundancy and load sharing  
The DC-input power supply provides redundant power by design. During normal operation, the two  
PEMFs provide system power simultaneously (load share). When you remove one PEMF, the  
remaining PEMF immediately ramps up to provide full power and maintain uninterrupted system  
power.  
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Table 1-11 PEMF MBUS Connector Pin Definitions  
Pin  
1
Description  
Breaker enable  
2
5.15 voltage sense to backplane  
5.15 current sense, between PEMFs  
5.15 voltage sense return, to backplane  
ID_P  
3
4
5
6
ID_0  
7
5.15 volt return, main bus return from backplane  
5.15 volt return, main bus return from backplane  
5.15 volt return, main bus return from backplane  
1.60 volt main power to backplane (2 amps)  
Mbus_B_H, DATA  
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
Mbus_B_L, DATA  
Return line from pin 1  
open  
open  
48 volt monitor to mbus (not backplane)  
48 volt current monitor to mbus (not backplane)  
1.60 volt current monitor, internal to PEMF  
5.15 volt / 15 amp peak  
5.15 volt  
5.15 volt  
1.6 volt return (2 amp)  
Mbus_A_H, DATA  
Mbus_A_L, DATA  
Voltage level and current monitoring  
The DC-input power supply is designed to prevent any energy hazard during operation. DC power  
is first routed to a circuit breaker, followed by a surge protector. In addition, an isolation diode  
circuit protects against possible DC-input failure.  
The DC-input power supply monitors analog output voltage and current. The battery side of the DC  
input is equipped with a 60A circuit breaker, which trips if current reaches peak parameters for  
2 seconds. The DC-input power supply circuits are described in Table 1-12.  
If a PEMF is not properly seated in the Cisco AS5850 backplane, an electronic circuit, or interlock,  
trips a breaker in the PEMF and terminates power to the output connectors. This same interlock  
provides reverse polarity protection when the system is powered off.  
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Table 1-12 DC-input Power Supply Circuits  
Circuit  
Description  
Circuit breaker  
PEMF output is enabled when this pin is shorted to the 51V  
monitor pin by way of the backplane. If the connection is broken,  
the breaker is tripped and cannot be reset until the PEMF is  
reinstalled.  
Reverse polarity  
Current monitor  
An electronic interlock that provides reverse polarity protection.  
Analog output voltage is proportional to DC-output current from  
the PEMF to the backplane, as follows: 1A of current is  
equivalent to 100 mV at the current monitor pin.  
Voltage monitor  
Bell alarm  
Analog output voltage is proportional to DC-output current from  
the PEMF to the backplane, as follows: 1A of current is  
equivalent to 100 mV at the voltage monitor pin.  
A terminal block for connecting to central office alarms (C, NC,  
NO).  
Note  
Connect the alarm port only to a safety extra-low voltage (SELV) source using 22 AWG, or thicker, copper  
wire. SELV ratings are maximum 30 Volts AC (RMS), maximum 60 Volts DC, and maximum  
50 VA power. The alarm port is rated for 2.0 Amp maximum current.  
Bell alarm signaling  
The PEMFs provide relay outputs for standard central office bell alarms. These bell alarm contacts  
are available on a terminal plug mounted on the PEMF front panel.  
Online insertion and removal (OIR)  
The PEMFs support OIR, which means that you can remove or replace a PEMF while the system is  
operating; system operation is not affected. Only qualified personnel should OIR a PEMF.  
DC-input power filtering and power distribution  
The PEMF first receives –48 VDC power using analog isolation circuits. The DC power passes  
through a broadband EMI filter, then passes to a DC-to-DC converter on the RSC, where it is  
converted and then routed back to the backplane for distribution to the other cards. A single PEMF  
supports a fully configured chassis.  
Maintenance monitoring  
The PEMF contains the environmental maintenance bus (Mbus) module with a logic card, which  
carries monitor signals throughout the chassis by way of two 10-pin molex MiniFit connectors.  
There are no connectors accessible from the front of the PEMF; however, a DB-9 connector at the base  
of the PEMF (visible only from below the chassis) connects a monitor cable to an optional AC-input  
power shelf.  
The PEMFs are located on the rear of the universal gateway. Figure 1-2 shows the location of the PEMFs  
as viewed from the rear of the chassis.  
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The PEMFs contain two LEDs on the front panel—POWER and MISWIRE. The POWER LED indicates  
that input voltage is present and the PEMF circuit breaker is on; the MISWIRE LED should remain off,  
but comes on if the two DC conductors entering the PEMF DC-input power terminal block (see  
Figure 1-2) are reversed. If the POWER LED does not light, one of the output voltages is not present on  
the PEMF (–48V, 5.1V, 1.6V).  
For detailed specification tables, refer to Appendix A, “Cisco AS5850 Specifications.”  
2400W AC-Input Power Shelf  
The 2400W AC-input power shelf includes three 1200-watt (W) AC-input power modules that plug into  
a common power backplane in the 2400W AC-input power shelf. Two 1200W AC-input power modules  
are capable of powering a fully configured Cisco AS5850. The third power module provides full  
redundancy.  
During normal operation, the three AC-input power modules provide automatic load-sharing, with each  
power module supporting 33 percent of the power load. When you remove one of the AC-input power  
modules, the remaining power modules immediately ramp up to full power and maintain uninterrupted  
system power.  
Note  
The AC-input power modules in the 2400W AC-input power shelf are hot-swappable, allowing you  
to remove or replace a power module while the system is operating; system operation will not be  
affected. Whenever possible, Cisco recommends that you connect each AC-input power module to a  
separate AC power source.  
Each AC-input power module is powered on automatically when it is plugged in and receiving power.  
Ejector lever/handles secure each power module to the backplane connectors and allow you to remove  
and replace the power modules with ease.  
Figure 1-11 shows a front view of a 2400W AC-input power shelf installed in a four-post rack.  
Figure 1-11 Cisco AS5850 2400W AC-Input Power Shelf—Front View  
DC OK AC  
OK FAUL  
T
DC OK AC  
OK FAUL  
T
DC OK AC  
OK FAUL  
T
The 2400W AC-input power shelf is two rack units high (3.5 in. [8.88 cm]) and mounts underneath the  
chassis in a standard 19-inch 4-post or telco-type rack assembly.  
All cable connections for AC-input power, DC-output power, and status signals are made from the  
2400W AC-input power shelf rear. (See Figure 1-12.) Three modular power cables connect each  
AC-input power module to the site AC-input power source. Two DC-interconnect cables provide  
DC-output power to the chassis. Two monitor cables provide a status signal connection to the PEMF  
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maintenance bus (Mbus), which monitors voltage tolerance levels, temperature conditions, and power  
failure in the enhanced AC-input power shelf. A grounding cable provides a ground connection from the  
2400W AC-input power shelf to the chassis.  
Figure 1-12 shows a rear view of a 2400W AC-input power shelf before installation.  
Figure 1-12 Cisco AS5850 2400W AC-Input Power Shelf—Rear View  
-NEG (BLA  
SIDE A  
CK)  
-NEG (BLA  
SIDE A  
CK)  
J10  
+POS (RED)  
+POS (RED)  
For detailed specification tables, refer to Appendix A, “Cisco AS5850 Specifications.”  
Power Module Safety Features (2400W AC-Input Power Shelf)  
The power modules in the enhanced 2400W AC-input power shelf have the following safety features:  
AC power modules installed in the enhanced AC-input power shelf are protected against overcurrent  
by circuit breakers, and against overtemperature by internal protection circuits.  
A spring-clip locking mechanism in the ejector lever/handles holds individual AC power modules  
in place, and prevents the power module from vibrating or sliding out of the power bay and  
dislodging from the power backplane. A small flat-blade screwdriver is needed to delatch the AC  
modules. Pulling on the handles without properly releasing the latches can damage the modules.  
Double grounding lugs (as per NEBS requirements) on both the enhanced AC-input power shelf and  
the chassis provide electrical grounding.  
The power modules are self-monitoring. Each power module monitors its own temperature and  
internal voltages. An internal fan in each power module draws cooling air from the front of the  
power shelf, through the power module, and out the rear of the power shelf. The power module  
airflow is separate from the rest of the Cisco AS5850 components.  
Internal monitoring data is passed to the chassis through the maintenance bus (Mbus) monitoring  
system. You can view this data through a terminal connected to the RSC console port. The command  
to display the monitoring information is described in the Cisco AS5850 Universal Gateway  
Operation, Administration, Maintenance, and Provisioning Guide, available online at:  
index.htm  
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Power Requirements  
2400W Power Shelf LED Indicators  
The 2400W AC-input power shelf includes three LEDs that are located on the front of each power  
module for the 2400W AC-input power shelf. (See Figure 1-13.)  
Figure 1-13 2400W AC-Input Power Module LEDs  
DC OK AC  
OK FAUL  
T
DC OK AC  
OK FAUL  
T
DC OK AC  
OK FAUL  
T
DC OK  
AC  
OK  
FA  
UL  
T
The power module LEDs for the enhanced AC-input power shelf are summarized in Table 1-13.  
Table 1-13 2400W AC-Input Power Module LEDs  
LED  
Color  
Description  
AC OK  
Green  
On indicates power is present and within the specified voltage and  
frequency levels.  
DC OK  
FAULT  
Green  
Red  
On indicates power is present and within the specified voltage and  
frequency levels.  
On indicates a power fault condition such as overvoltage, undervoltage,  
overtemperature, or HV bus low.  
Power Requirements  
The Cisco AS5850 ships configured for either AC-input or DC-input power with loadsharing, depending  
on your order.  
AC-Input Power Specifications  
The Cisco AS5850 accepts AC-input power using a separate, self-contained AC-input power shelf,  
which converts AC-input power into DC output for use by the universal gateway. The AC-input power  
shelf is rack-mounted and has a safety cover that shields the electrical connections in the power shelf  
rear.  
The AC-input to DC-output connection supplies –48 VDC-output power to the PEMFs. Power flows  
through the filter module to the backplane, where it is distributed to the RSC and feature cards.  
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DC-Input Power Specifications  
The PEMFs provide –48 VDC power, which is distributed from the PEMF to the chassis backplane. No  
damage occurs to the PEMFs if any or all outputs have no load (no load occurs when there are no cards  
plugged into the backplane), or if the maximum input voltage is exceeded; however, input voltages that  
exceed 75V eventually trip the PEMF 60A circuit breaker, and you might have to reset the breaker.  
The Cisco AS5850 supports several types of logic cards with varying power requirements. As a result,  
each logic card DC-to-DC converter system is isolated from the distributed –48 VDC power, creating a  
more stable distributed power system.  
Online Insertion and Removal  
The Cisco AS5850 supports online insertion and removal (OIR), which allows you to remove and  
replace a field-replaceable unit (FRU) while the system is operating, without affecting system operation.  
Note  
This section describes the mechanical functions of the system components and emphasizes the  
importance of following the correct procedures to avoid unnecessary circuit board failures. This  
section is for background information only.  
Each FRU contains female connectors that connect to the system backplane. Each male backplane  
connector comprises a set of tiered pins in three lengths. The backplane pins send specific signals to the  
system as they make contact with the card connectors. The system assesses the signals it receives and  
the order in which it receives them to determine whether to initialize a startup or shutdown procedure.  
Each RSC card and feature card is designed with two ejector levers to be used when you install or remove  
a card. The function of the ejector levers (see Figure 3-4) is to align and securely seat the card connectors  
in the backplane and facilitate the installation and removal process.  
Do not force the RSC cards or feature cards into the slot, because this can damage the card connector  
pins if they are not aligned properly with the card connectors.  
To avoid erroneous failure messages, you must allow at least 15 seconds for the system to reinitialize  
and note current interface configurations before you remove or insert another RSC card or feature card  
in the chassis.  
Note  
If you need to OIR the RSC serving as the primary clock source with a split backplane configuration,  
you will need to switch the primary clock source to the other RSC as described in Chapter 4,  
“Maintenance” in the Cisco AS5850 Operations, Administration, Maintenance, and Provisioning  
Guide, available online at:  
index.htm  
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