Telenetics Network Card DSP 9612 User Manual

DSP 9612 Flash Poll Modem  
User’s Guide  
Complements of ARC Electronics  
800-926-0226 [email protected]  
00490117100 Rev. A  
 
Contents  
NOTES  
Page iv  
 
Chapter 1  
Introduction  
ongratulations for purchasing the finest industrial-grade fast-  
poll modem available.  
C
The Telenetics DSP9612 (Flash Poll) modem is a 9600/4800/0-  
1800 bps modem designed for 4-wire, full-duplex or 2-wire, half-  
duplex operation over a voice-band leased line or private line. The  
modem is designed utilizing the latest digital-signal processing (DSP)  
technology to achieve high performance. The modem employs  
Telenetics’ proprietary modulation and encoding scheme to achieve  
fast modem training time. The modem is also backward compatible  
with Bell 202 and ITU-T V.23 modems.  
The DSP9612 modem is ideally suited for multi-point communication  
systems that require fast response time, short training time, and low  
throughput delay. The DSP9612 is the most technologically advanced  
modem on the market.  
This User’s Guide describes both the DSP9612FP (AC-powered)  
modem and the DSP9612-LV (DC-powered) modem. This manual is  
intended to let you get your modem “up and running” as quickly as  
possible. It contains all the information you need to configure and  
install your modem. It also contains troubleshooting information in the  
unlikely event you encounter a problem with your modem.  
Page 5  
 
Introduction  
Features  
The DSP9612 modem is specifically designed for harsh environments  
found in utility substations and industrial facilities. Though  
functionally similar to commercial modems, the DSP9612 provides the  
following unique features that make it well suited for utility and  
industrial applications.  
Packaged in a rugged, compact enclosure for industrial  
applications.  
Leased-line interface protected with heavy-duty surge protection  
hardware (15KV).  
Requires no human intervention, making it ideal for unmanned  
locations.  
Works within an extended temperature range of -40ºC to +85ºC.  
Designed with coupling transformers for high-voltage isolation  
and common mode noise rejection in industrial and commercial  
environments.  
Operate over voice-band conditioned or unconditioned leased line  
and pilot wires.  
Accepts power from a wide range of AC and DC power supplies.  
DSP9612FP: 85 to 265 VAC or 85 to 400 VDC  
DSP9612-LV: 10 to 53 VDC  
Standard industrial connectors for data, analog, and power  
interfaces allow reliable interconnection to other industrial  
equipment.  
Asynchronous data rates (selectable) of 9600, 4800, and 0-1800  
bps.  
Easily accessible DIP switches for user configuration and option  
selection.  
DB25 connector for RS-232/V.24 interface.  
Local analog, local digital, and remote digital loopback  
diagnostics.  
Page 6  
 
Applications  
Applications  
The DSP9612 modem is designed for point-to-point and multipoint  
data communications. Figure 1-1 shows a typical multipoint  
configuration.  
Figure 1-1. Network of Multipoint Configuration  
There are a number of factors that can affect the network’s and  
modem’s operation and performance. These include:  
Operating speed  
2-wire or 4-wire configuration  
Transmission line characteristics, noise, and line impairments  
Network configuration (point-to-point or multipoint)  
Number of nodes on the network  
Page 7  
 
Introduction  
NOTES  
Page 8  
 
Chapter 2  
Installation  
his chapter describes how to install the modem.  
T
Unpacking Your Hardware  
Your package should include:  
At least one of the following DSP9612 modems:  
Model DSP9612FP for 85 to 265 VAC  
Model DSP9612-LV for 10 to 53 VDC  
A leased-line cable  
A shielded DC power cable (model DSP9612-LV modem only)  
This User’s Guide  
If your package contents are damaged or missing, please contact your  
place of purchase immediately.  
Additional Items You Need  
To use your modem, you need the following additional items:  
Two- or four-wire transmission line or leased line  
A DB25-F data cable for your Data Terminal Equipment (DTE)  
port  
Page 9  
 
Installation  
A power supply that provides either:  
85 to 265 Volts AC, 50 to 60 Hz, single phase or 85 to  
400 VDC (if you have the model DSP9612FP modem), or  
10 to 53 Volts DC (if you have the model DSP9612-LV  
modem)  
Hardware Overview  
Back View  
Figures 2-1 and 2-2 show the back view of the two DSP9612 modem  
models. Starting from the left side, these views show:  
A 4-wire/2-wire configuration block. See page 26.  
A female, 25-pin RS-232 connector, for connecting a standard  
DTE (RTU). See page 28.  
A POWER ON/OFF switch.  
A power connector. See page 27.  
Figure 2-1. Back View of Model DSP9612FP Modem  
Page 10  
 
Hardware Overview  
Figure 2-2. Back View of Model DSP9612-LV Modem  
Front View  
The Model DSP9612FP and Model 9612-LV modems have identical  
front panels. Figure 2-3 shows the front view of the modem. Starting  
from the left side, this view shows:  
A set of nine LEDs. See page 29.  
A loopback test switch. See page 30.  
Figure 2-3. Front View of Modem  
Page 11  
 
Installation  
Installation Summary  
The modem installation involves the following steps:  
1. Finding a suitable location for the modem. See the section below.  
2. Configuring the modem. See page 13.  
3. Connecting to a transmission line. See page 25.  
4. Connecting to a voltage source. See page 27.  
5. Connecting a DTE device. See page 28.  
Finding a Suitable Location  
The location you select should provide easy access to the back panel  
communications interface(s) and front panel power interface. It should  
also let you view all the LEDs on the front panel.  
Telenetics also offers a rack-mount version of this modem  
(Model DSP9612RM) as a plug-in module for the  
Telenetics/UDS RM16M Central Site Modem Rack. For more  
information, contact Telenetics Corporation’s Sales Department  
at (949) 455-4000.  
Note:  
Page 12  
 
Configuring the Modem  
Configuring the Modem  
You configure the modem using the three sets of DIP switches on the  
bottom of the modem.  
It is important to follow the three steps described  
,
below, in the order shown, to ensure that you configure  
your modem properly using the modem DIP switches:  
IMPORTANT  
1. Use DIP switch 3 (SW3) to configure the modem  
for your host DTE interface and network topology.  
Using SW3, you select the modem to operate in  
high-speed fast-poll or low-speed (FSK) mode.  
2. If you set SW3 for FSK mode in step 1, use DIP  
switch 2 (SW2) to configure the modem for either  
Bell 202T or ITU-T V.23 compatibility.  
Otherwise, you can use the modem in fallback  
mode.  
3. Use DIP switch 1 (SW1) to select the modem’s  
transmitter output level and receiver dynamic  
range. The SW1 settings apply for both high-speed  
fast-poll and low-speed (FSK) modes.  
Page 13  
 
Installation  
SW1 DIP Switch Settings  
SW1 is an 8-position DIP switch. Table 2-1 shows the modem switch  
settings for DIP switch SW1. A description of the SW1 switch settings  
follows the table.  
SW1 settings apply for both high-speed fast-poll and low-  
speed (FSK) modes  
Note:  
Table 2-1. Modem Switch Settings for DIP Switch SW1  
Switches  
Switch Settings  
ON  
OFF (Default)  
(see Table 2-2 on page 15)  
SW1-1 1-4: Transmit Level (page 15)  
SW1-5: Receiver Dynamic Range  
(page 16)  
10 to 43 dBm  
Enabled  
+3 to 30 dBm  
SW1-6: TX Cable Equalizer (page 16)  
Disabled  
Disabled  
Inactive  
SW1-7: RX Cable Equalizer (page 16) Enabled  
SW1-8: Anti-streaming (page 16) Active  
Page 14  
 
Configuring the Modem  
SW1-1 through SW1-4 Transmit Level  
Switches SW1-1 through SW1-4 adjust the modem’s transmit level.  
Table 2-2 shows the transmit levels you can select using these  
switches.  
Table 2-2. Transmit Levels  
SW1 through SW4 Switch Settings  
SW1-1  
SW1-2  
SW1-3  
SW1-4  
Transmit Level  
0 dBm  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
OFF  
ON  
OFF  
ON  
1 dBm  
2 dBm  
3 dBm  
4 dBm  
5 dBm  
6 dBm  
7 dBm  
8 dBm  
9 dBm  
10 dBm  
11 dBm  
12 dBm  
13 dBm  
14 dBm  
+3 dBm  
OFF  
ON  
ON  
OFF  
OFF  
ON  
OFF  
ON  
ON  
ON  
OFF  
ON  
ON  
ON  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
OFF  
ON  
OFF  
ON  
ON  
ON  
OFF  
ON  
ON  
ON  
ON  
OFF  
OFF  
ON  
OFF  
ON  
ON  
ON  
ON  
ON  
OFF  
ON  
ON  
ON  
ON  
Page 15  
 
Installation  
SW1-5 Receiver Dynamic Range  
SW1-5  
ON = 10 to 43 dBm  
OFF = +3 to 30 dBm  
For a low receive signal level, set SW1-5 to ON (43 dBm ). For short  
distances or to select a strong receive signal, set SW1-5 to OFF.  
SW1-6 and SW1-7 Cable Equalizer (Fast-Poll Mode Only)  
SW1-6 ON = Enable TX Cable Equalizer  
OFF = Disable TX Cable Equalizer  
SW1-7 ON = Enable RX Cable Equalizer  
OFF = Disable RX Cable Equalizer  
To improve or extend the modem’s polling performance, use the fixed  
Compromise Cable Equalizer when polling on long metallic circuits.  
The cable equalizer is active only when the modem is in fast-poll mode  
(SW3-1 set to OFF).  
SW1-8 Anti-streaming  
SW1-8 ON = Anti-streaming active  
OFF = Anti-stream inactive  
Typically, anti-streaming is used in multi-point applications to prevent  
a malfunctioning slave modem from occupying the line indefinitely.  
When anti-streaming is active, the modem can transmit data for a  
maximum of 27 seconds before the transmitter turns off automatically.  
The modem then looks for an ON-to-OFF Request To Send (RTS)  
transition before proceeding with normal operation. Anti-streaming can  
be selected in either high-speed or low-speed mode.  
Page 16  
 
Configuring the Modem  
SW2 DIP Switch Settings  
SW2 is an 8-position DIP switch. Table 2-3 shows the modem switch  
settings for DIP switch SW2. A description of the SW2 switch settings  
follows the table.  
Table 2-3. Modem Switch Settings for DIP Switch SW2  
Switches  
Switch Settings  
OFF (Default)  
ON  
SW2-1: FSK Mode (page 18)  
V.23  
Turnaround  
Bell 202  
SW2-2: Receiver Squelch (page 18)  
(valid for FSK mode, 2-wire half-duplex Squelch (Bell  
operation only)  
Turnaround  
Squelch (Bell 202):  
0ms  
202): 8ms  
Turnaround  
Squelch (V.23):  
150ms  
Turnaround  
Squelch (V.23):  
0ms  
SW2-3: FSK Soft Carrier (page 19)  
Disabled  
Enabled  
SW2-4 and SW2-5: FSK RTS-CTS  
Delay (page 19)  
(see Table 2-4)  
SW2-6: FSK CD Delay (page 20)  
SW2-7: Remote Loopback (page 20)  
23ms  
6ms  
Enabled  
Disabled  
Normal  
SW2-8: Reserved (Test Only) (page 20) Test  
Page 17  
 
Installation  
SW2-1 FSK Mode  
SW2-1 ON = ITU-T V.23 mode  
OFF = Bell 202 mode  
The modem has two FSK modes:  
Bell 202, which supports data rates from 0 to 1800 bps  
ITU-T V.23, which supports data rates from 0 to 1200 bps  
SW2-1 configures the modem for either of these FSK modes. Setting  
SW2-1 to ON selects ITU-T V.23 mode. In this mode, the modem  
complies with ITU-T (CCITT) recommendation V.23 with the  
following parameters:  
Mode 2 modulation only  
No backward channel  
No provisions for disablement of echo suppressors  
DTR (circuit 108) is ignored  
Setting SW2-1 OFF selects Bell 202 mode.  
SW2-2 Receiver Squelch (FSK Mode 2-Wire Half-Duplex Only)  
SW2-2 ON = 8ms for Bell 202, 150ms for ITU-T V.23  
OFF = 0ms  
SW2-2 configures the turnaround squelch delay and is valid when the  
following are active:  
FSK mode (SW3-1 ON)  
2-wire half-duplex operation (SW3-7 ON)  
Setting this switch to OFF configures the modem to enable its receiver  
immediately after the Request To Send (RTS) signal is turned off.  
When this switch is set to OFF and the modem is configured for 2-  
Page 18  
 
Configuring the Modem  
wire, half-duplex mode (SW3-7 ON), the modem squelches the  
receiver after RTS is turned off to prevent far-end echoes from causing  
data errors. The duration that the modem squelches the receiver is  
either:  
8 milliseconds if the modem is configured for Bell 202 mode  
(SW2-1 OFF)  
150 milliseconds if the modem is configured for ITU-T V.23 mode  
(SW2-1 ON)  
SW2-3 FSK Soft Carrier (Bell 202 FSK Mode Only)  
SW2-3 ON = None  
OFF = 8ms  
SW2-3 controls the soft carrier and is valid for Bell 202 FSK mode  
only (SW2-1 set to OFF). Setting this switch to OFF configures the  
modem to transmit a 900 Hz soft carrier to the remote modem for 8  
milliseconds after RTS is turned off. Setting this switch to ON prevents  
the modem from transmitting a soft carrier after RTS is turned off.  
SW2-4 and SW2-5 RTS-CTS Delay (Bell 202 Mode Only)  
Switches SW2-4 and SW2-5 determine the duration of the RTS-CTS  
delay in Bell 202 mode. Table 2-4 shows how to set these switches to  
select the appropriate setting.  
Table 2-4. RTS-CTS Delay Settings in Bell 202 Mode  
To Select  
Set SW2-4 to…  
And Set SW2-5 to…  
a Delay of…  
8ms  
33ms  
59ms  
219ms  
OFF  
OFF  
ON  
OFF  
ON  
OFF  
ON  
ON  
Page 19  
 
Installation  
When the modem is configured for V.23 operation (SW2-1 ON), the  
RTS-CTS delay is fixed at 33 ms.  
SW2-6 FSK CD Delay (Bell 202 Mode Only)  
SW2-6 ON = 23ms  
OFF = 6ms  
SW2-6 selects the FSK CD delay and is valid when Bell 202 mode is  
active (SW2-1 OFF). Setting SW2-6 ON configures the modem to turn  
on CD 23 milliseconds after it detects a valid carrier signal. Setting this  
switch to OFF configures the modem to turn on CD 6 milliseconds  
after it detects a valid carrier signal.  
This switch setting is deactivated when the modem is configured for  
V.23 mode (SW2-1 ON) and a delay of 18 milliseconds is used instead.  
SW2-7 Remote Loopback  
SW2-7 ON = Loopback enabled  
OFF = Loopback disabled  
During instances of channel noise, the modem may mistaken a received  
preamble as a request to go into remote digital loopback. Setting SW2-  
7 to OFF prevents the modem from participating in a remote digital  
loopback with another modem. SW2-7 does not prevent the modem  
from sending a remote digital loopback request to a remote modem.  
SW2-8 Reserved (Test Only)  
SW2-8 Must be OFF  
SW2-8 must be in the OFF position for normal operation.  
Page 20  
 
Configuring the Modem  
SW3 DIP Switch Settings  
SW3 is a 10-position DIP switch. Table 2-5 shows the modem switch  
settings for DIP switch SW3. A description of the SW3 switch settings  
follows the table.  
Table 2-5. Modem Switch Settings for DIP Switch SW3  
Switches  
Switch Settings  
OFF (Default)  
ON  
SW3-1: Fast Poll/FSK (page 22)  
SW3-2: Data Rate (page 23)  
SW3-3: Async Character (page 23)  
SW3-4: Auto RTS (page 23)  
FSK  
Fast Poll Auto-Rate  
9600 bps  
4800 bps  
11 bits  
10 bits  
Enabled  
Disabled  
SW3-5: Transmitter Termination (page Switched by RTS  
24)  
600 Ω  
SW3-6: Reserved (Test Only) (page 24) Test  
Normal  
SW3-7: 2- or 4-wire (page 24)  
SW3-8: Carrier Control (page 25)  
SW3-9: Rx Termination (page25)  
2-wire, half-duplex 4-wire, full-duplex  
Constant  
600 Ω  
Switched  
High Rx Impedance  
Separated  
SW3-10: Signal Ground and Earth  
Ground Option (page 25)  
Connected  
Page 21  
 
Installation  
SW3-1 Fast Poll Auto Rate/FSK  
SW3-1 ON = Low-Speed Mode (FSK)  
OFF = High-Speed Mode (Fast Poll)  
The modem has two operating modes:  
FSK mode, which supports data rates from 0 to 1800 bps.  
Fast-poll mode, which supports data rates of 4800 and 9600 bps.  
SW3-1, along with the Data Rate Selector (DRS) pin on the modem’s  
RS-232 connector, configures the modem for either FSK or fast-poll  
mode. Table 2-6 shows how SW3-1 and the DRS signal configure the  
modem for these operating modes.  
Table 2-6. Modem Operating Mode  
To Select…  
Set SW3-1 to…  
And the DRS Signal…  
Fast-poll mode  
OFF  
Is not connected or is set  
HIGH  
FSK mode  
FSK mode  
OFF  
ON  
Is set LOW  
Doesn’t care  
You should use the DRS signal in RTS control mode. It does not work  
in either constant carrier mode (SW3-8 set to ON) or in the auto-RTS  
mode (SW3-4 set to ON). The DRS signal is only sampled when the  
transmitter is idle (when not sending a preamble, data, or a turn-off  
sequence).  
Note that DRS controls both the transmitter and receiver. If DRS  
changes states while the modem is receiving a preamble, data, or a  
turn-off sequence, the state of the receiver is unknown until the carrier  
drops and a new preamble is received. We recommend that DRS does  
not change states until both the local and remote modems’ transmitters  
are in the idle state. When they are, both the local and remote modems’  
DRS signal should change states.  
Page 22  
 
Configuring the Modem  
SW3-2 Data Rate (Fast-Poll Mode Only)  
SW3-2 ON = 4800 bps  
OFF = 9600 bps  
SW3-2 configures the modem speed. When the modem is in high-  
speed fast-poll mode (SW3-1 OFF), setting SW3-2 ON selects 4800  
bps, while setting SW3-2 OFF selects 9600 bps.  
SW3-3 Async Character (Fast-Poll Mode Only)  
SW3-3 ON = 11 bits  
OFF = 10 bits  
Switch SW3-3 selects whether the async character is 10 or 11 bits long.  
When the modem is in high-speed fast-poll mode (SW3-1 OFF),  
setting SW3-3 ON selects an 11-bit async characters, while setting  
SW3-3 OFF selects a 10-bit async character.  
SW3-4 Auto RTS (Fast-Poll Mode Only)  
SW3-4 ON = Enable Auto RTS  
OFF = Disable Auto RTS  
For data terminals that do not support hardware RTS, set SW3-4 to ON  
to enable auto RTS mode. In this mode, TXD is detected at the modem  
and an internal RTS signal is turned ON. After training completes, the  
TXD is transmitted to the remote modem. The transmitter turns off if  
no TXD is detected after 1 character length of idle time. Auto RTS is  
used in fast-poll mode only (SW3-1 set to OFF).  
Page 23  
 
Installation  
SW3-5 Transmitter Termination  
SW3-5 ON = Switched by RTS  
OFF = 600 Ω  
SW3-5 is used for multi-point configuration networks. When multiple  
modems are connected on the same metallic circuit:  
The transmitter termination should be of high impedance if the  
modem is not transmitting.  
The transmitter is only terminated with 600 ohms when RTS is  
asserted.  
This configuration should be used for all slave modems to prevent the  
transmitting modem from being unnecessarily burdened. To select this  
configuration, set SW3-5 ON on the slave modems.  
If you use the modem with transmission lines that are transformer-  
coupled or with an impedance-isolated network (such as a transformer  
bridge), set SW3-5 OFF for proper operation.  
SW3-6 Reserved (Test Only)  
SW3-6 Must be OFF  
SW3-6 must be in the OFF position for normal operation.  
SW3-7 2-/4-Wire Operation  
SW3-7 ON = 2-Wire, Half-Duplex Mode  
OFF = 4-Wire, Full-Duplex Mode  
SW3-7 configures the modem for 4-wire full-duplex or 2-wire half-  
duplex operation.  
Page 24  
 
Configuring the Modem  
SW3-8 Carrier Control  
SW3-8 ON = Constant  
OFF = Switched  
SW3-8 selects either constant or switched carrier. Constant carrier  
allows DTEs, such as asynchronous dumb terminals or RTUs, to  
operate with modems, without the input RTS signal. When constant  
carrier mode is enabled (SW3-8 set to ON), the modem forces the  
transmit carrier active and the RTS-CTS delay is minimum (<0.5 ms.).  
You can use constant carrier in 4-wire, point-to-point or multi-point  
applications (from master to slave modems).  
In switched-carrier mode (SW3-8 set to OFF), the RTS/CTS delay is  
active.  
SW3-9 RX Termination  
SW3-9 ON = Enable Rx Termination  
OFF = Disable Rx Termination  
SW3-9 selects whether RX termination is enabled for a modem. If you  
set this switch ON, the receiver is terminated with 600 . If you set  
this switch OFF, the receiver is not terminated.  
SW3-10 Grounding Option  
SW3-10 ON = Signal Ground and Earth Ground are Connected  
OFF = Signal Ground and Earth Ground are Separated  
Page 25  
 
Installation  
Connecting to a Transmission Line  
The modem has a transmission line interface that can be configured for  
2- or 4-wire, analog connection, where one pair is used to transmit data  
(Tx and Tx) and one pair is used to receive data (Rx and Rx). Table 2-7  
shows the pin numbers and corresponding signals for the modem.  
Figure 2-4 shows the transmission line interface.  
For communication to occur, the Rx line of one modem  
must connect to the Tx line of the other modem. The  
modem’s Tx/Rx pair are non-polarized.  
Note:  
Note:  
The modem does not support leased-line operations with DC  
current.  
Table 2-7. Transmission Line Connector Pin Assignments  
This Pin Number…  
Corresponds to This Signal…  
1
Rx  
2
3
4
Rx  
Tx  
Tx  
Page 26  
 
Connecting to a Voltage Source  
Figure 2-4. Transmission Line Interface  
Connecting to a Voltage Source  
The back panel of the modem provides the power interface. For  
convenience, the modems can be powered from the following power  
sources:  
Model DSP9612FP (AC version): 85 to 265 Volts AC, 50 to 60  
Hz, single phase or 85 to 400 VDC  
Model DSP9612-LV (DC version): 10 to 53 Volts DC. The model  
DSP9612-LV comes with a shielded power cord for making this  
connection.  
Figure 2-1 on page 10 shows the connection to the Model  
DSP9612FP’s power interface. Figure 2-2 on page 11 shows the  
connection to the Model DSP9612-LV’s power interface.  
Page 27  
 
Installation  
Before you connect a voltage source, observe the  
following power supply voltage guidelines.  
Otherwise, you will void your warranty if the wrong  
voltage is applied.  
,
WARNING  
Be sure the voltage source is within the permitted  
ranges shown above. Otherwise, your modem and  
any attached devices may be damaged.  
Customer-supplied cables must be suitable for the  
site environmental conditions.  
Screw terminals on the power interface accept 24 to  
16 AWG. However, surge protection is guaranteed  
only if the ground wire is greater than 18 AWG and  
if there is a solidly earthed ground connection.  
Be sure the power source is not controlled by a wall  
switch, which can be inadvertently turned off,  
shutting off power to the modem.  
Connecting an RS-232 Device  
The modem back panel provides a female, 25-pin RS-232 connector  
that accepts an attached RS-232 device (see Figure 2-1 on page 10).  
This connector accepts a standard connection to a DTE (RTU) that  
conforms to the pin assignments shown under “RS-232 (DTE)  
Interface” on page 38.  
Page 28  
 
LEDs  
LEDs  
The front panel of the modem provides the LEDs shown in Table 2-8.  
Table 2-8. Modem LEDs  
LED  
Color  
Green  
Description  
Power Input  
PWR  
Yellow  
Yellow  
Yellow  
Yellow  
Yellow  
Yellow  
Red*  
Request To Send  
Clear To Send  
Transmit Data  
Receive Data  
RTS  
CTS  
TD  
RD  
Carrier Detect  
Modem Ready  
Analog Loopback  
Digital Loopback  
CD  
MR  
ALB  
DLB  
Red*  
* When the modem is in remote loopback, both the ALB  
and DLB LEDs go ON.  
Page 29  
 
Installation  
Loopback Control Switch  
The front panel of the modem has a push button for initiating the  
following loopback diagnostic tests:  
Local analog loopback started by pressing the button one time.  
Local digital loopback started by pressing the button two times.  
Remote digital loopback set the local modem’s RTS signal to  
low. Then press the remote modem’s diagnostics button three  
times and raise the local modem’s RTS signal to start the test. The  
ALB and DLB LEDs go ON when the modem is in remote digital  
loopback. This test is only available in fast-poll mode only.  
Figure 2-4 illustrates these three diagnostics.  
Figure 2-4. Loopback Diagnostics  
Page 30  
 
Appendix A  
Troubleshooting  
n the event you encounter a problem using your Telenetics modem,  
refer to the troubleshooting information in this appendix.  
I
If you encounter a problem with your modem, be sure  
the switches on the bottom of the modem are set to the  
appropriate positions. If a switch is halfway between  
an on and off setting, the modem will not operate  
properly.  
,
IMPORTANT  
Problem Solving  
Table A-1 offers troubleshooting solutions for modem problems.  
Table A-1. Troubleshooting Suggestions  
If…  
Perform These Procedures…  
Modem does not respond to  
the attached DTE and the all  
LEDs are off.  
Check the power supply input for your  
specific model (see page 27).  
Modem does not receive data, The receive line pair may be  
disconnected from the modem. Make  
sure the transmission line connection  
to the modem is accurate and secure.  
and the DCD and RxD LEDs  
are off.  
The receive signal level may be below  
the CD threshold. Set SW1-5 ON to  
see whether configuring the modem  
for a 43 dBm threshold resolves the  
Page 31  
 
Troubleshooting  
Table A-1. Troubleshooting Suggestions  
If…  
Perform These Procedures…  
problem.  
The attached terminal or DTE may not  
be sending data to the modem. Verify  
that data is being transmitted. If data is  
being transmitted, make sure the RS-  
232 cable is sound and securely  
connected to the modem and terminal  
or DTE.  
The RTS, CTS, and TxD  
LEDs do not blink.  
Page 32  
 
Appendix B  
DIP Switch Summary  
Switches  
Switch Settings  
ON  
OFF (Default)  
(see Table 2-2 on page 15)  
SW1-1 1-4: Transmit Level (page 15)  
SW1-5: Receiver Dynamic Range  
(page 16)  
10 to 43 dBm  
Enabled  
+3 to 30 dBm  
SW1-6: TX Cable Equalizer (page 16)  
Disabled  
Disabled  
Inactive  
SW1-7: RX Cable Equalizer (page 16) Enabled  
SW1-8: Anti-streaming (page 16)  
Active  
SW2-1: FSK Mode (page 18)  
V.23  
Bell 202  
SW2-2: Receiver Squelch (page 18)  
(valid for FSK mode, 2-wire half-duplex Squelch (Bell  
operation only)  
Turnaround  
Turnaround  
Squelch (Bell 202):  
0ms  
202): 8ms  
Turnaround  
Squelch (V.23):  
150ms  
Turnaround  
Squelch (V.23):  
0ms  
SW2-3: FSK Soft Carrier (page 19)  
Disabled  
Enabled  
SW2-4 and SW2-5: FSK RTS-CTS  
Delay (page 19)  
(see Table 2-4)  
SW2-6: FSK CD Delay (page 20)  
SW2-7: Remote Loopback (page 20)  
23ms  
6ms  
Enabled  
Disabled  
Normal  
SW2-8: Reserved (Test Only) (page 20) Test  
Page 33  
 
DIP Switch Summary  
Switches  
Switch Settings  
OFF (Default)  
ON  
SW3-1: Fast Poll/FSK (page 22)  
SW3-2: Data Rate (page 23)  
SW3-3: Async Character (page 23)  
SW3-4: Auto RTS (page 23)  
FSK  
Fast Poll Auto-Rate  
9600 bps  
4800 bps  
11 bits  
10 bits  
Enabled  
Disabled  
SW3-5: Transmitter Termination (page Switched by RTS  
24)  
600 Ω  
SW3-6: Reserved (Test Only) (page 24) Test  
Normal  
SW3-7: 2- or 4-wire (page 24)  
SW3-8: Carrier Control (page 25)  
SW3-9: Rx Termination (page25)  
2-wire, half-duplex 4-wire, full-duplex  
Constant  
600 Ω  
Switched  
High Rx Impedance  
Separated  
SW3-10: Signal Ground and Earth  
Ground Option (page 25)  
Connected  
Page 34  
 
Appendix C  
Specifications  
General Specifications  
Data rate:  
9600, 4800, or 0-1800 bps asynchronous  
8 or 9 data bits with 1 or more stop bits  
EIA RS-232 or V.24 compatible  
Data format:  
DTE interface:  
Line conditions:  
TELCO Voice band 4- or 2-wire leased line,  
conditioned or unconditioned  
Private metallic circuits up to 9.5 miles (24  
AWG) without cable equalizer. Up to 15.0 miles  
(24 AWG) with TX and RX cable equalizer  
Operating modes: 2-wire half-duplex or 4-wire full-duplex  
Modulation:  
High-speed fast poll – Telenetics proprietary  
FSK, Bell 202T or V.23 compatible  
Mark = 1200 Hz (1300 Hz, V.23)  
Space = 2200 Hz (2100 Hz, V.23)  
Soft Carrier = 900 Hz (Bell 202T only)  
Equalizer:  
Automatic, adaptive  
RTS-CTS Delay:  
23 ms. (fast poll)  
8, 33, 59, or 219 ms (Bell 202)  
33 ms (V.23)  
Page 35  
 
Specifications  
Receiver  
dynamic range:  
0 to –30 dBm or –10 to –43 dBm  
Operating  
temperature:  
-40°C to +85°C  
Power supply:  
Wide range switching power supply:  
DSP9612FP (AC version): 85 to 265Volts  
AC, 50/60 Hz, single phase or 85 to 400  
VDC  
DSP9612-LV (DC version):10 to 53 Volts  
DC  
Surge protection: Leased line, up to 15KV  
Carrier control:  
Constant or switched, DIP switch selectable  
Carrier loss  
recovery:  
Train on Data  
Throughput delay: Less than 10 milliseconds for fast polling.  
Auto RTS:  
Support DTE without hardware RTS  
(high speed only)  
Anti-Streaming:  
27-second timer to prevent transmitter lock-up  
network  
Mechanical Specifications  
Enclosure:  
Aluminum with removable front and rear panels  
Dimensions:  
Weight:  
5.70” wide x 8.30” long x 1.50” high  
1.9 lbs.  
Interface connectors  
Leased line:  
4-position screw terminal.  
DB-25 female connector  
Data Terminal  
Equipment:  
Page 36  
 
Interface Connector Pin Assignments  
Interface Connector Pin Assignments  
Leased Line Terminal Block Pin Assignments  
This Pin  
Number…  
Corresponds to  
This Signal…  
1
2
3
4
Rx  
Rx  
Tx  
Tx  
Back-to-Back Connection to a Second Modem  
Page 37  
 
Specifications  
RS-232 (DTE) Interface  
Signal Name  
Earth GND  
TXD  
Modem Input/Output  
DB25 Pin  
Description  
1
2
3
4
5
6
Earth Ground  
Transmit Data  
Receive Data  
Request To Send  
Clear To Send  
Input  
RXD  
Output  
Input  
RTS  
CTS  
Output  
Output  
DSR  
Data Set Ready  
(Modem Ready)  
SG  
7
8
Signal Ground  
DCD  
Output  
Data Carrier  
Detected  
DRS  
Input  
23  
Data Rate Select  
Environmental Specifications  
Operating temperature: -40 to + 85o C  
Storage temperature:  
Operating humidity:  
Line Isolation:  
-40 to +125o C  
5 to 95 %, non-condensing.  
3750 V RMS  
Surge protection:  
Leased line up to 15K VA  
Page 38  
 
Compliances  
Compliances  
The modem is designed to meet the following agency requirements:  
EMI/RFI:  
FCC part 15 for Class A computing device  
Industry Canada. (Emissions)  
Page 39  
 
Specifications  
NOTES  
Page 40  
 
Appendix D  
Compliances  
This device complies with Part 15A of the FCC Rules. Operation is subject to  
the following two conditions: (1) this device may not cause harmful  
interference, and (2) this device must accept any interference received,  
including interference that may cause undesired operation.  
This equipment has been tested and found to comply with the limits for a Class  
A digital device, pursuant to Part 15A of the FCC Rules. These limits are  
designed to provide reasonable protection against harmful interference in a  
residential installation. This equipment generates, uses, and can radiate radio  
frequency energy and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio communications.  
However, there is no guarantee that interference will not occur in a particular  
installation. If this equipment does cause harmful interference to radio or  
television reception, which can be determined by turning the equipment off and  
on, the user is encouraged to try to correct the interference by one or more of  
the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and the receiver.  
Connect the equipment to an outlet on a circuit other than the one to  
which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
If none of these actions resolves the problem, consult your distributor or an  
experienced radio/television technician for additional suggestions.  
Additionally, Section 15.838, paragraph d), of the FCC Rules and Regulations  
states: “Where special accessories, such as shielded cables, are required in  
order to meet FCC regulations, shielded cables must be used with this  
equipment. Operation with non-approved equipment or unshielded cables is  
likely to result in interference to radio and TV reception. The user is cautioned  
that changes and modifications to this equipment without the approval of the  
manufacturer could void the user’s authority to operate this equipment.  
Page 41  
 
Compliances  
Department of Canada Statement  
This Class A digital apparatus meets all requirements of the Canadian  
Interference-Causing Equipment Regulations.  
Cet appareil numerique de la classe A respecte toutes les exigences du  
Reglement sur le materiel brouilleur du Canada.  
Page 42  
 
Appendix E  
Limited Product  
Warranty  
Telenetics warrants that the Product sold will be free from defects in material and  
workmanship and perform to Telenetics' applicable published specifications for a period of  
18 months from the date of delivery to Customer or 12 months from placement into service,  
whichever occurs first. The liability of Telenetics hereunder shall be limited to replacing or  
repairing, at its option, any defective Products which are returned F.O.B., Telenetics'  
facility, Lake Forest, California (or, at Telenetics' option refunding the purchase price of  
such products). In no case are Products to be returned without first obtaining permission  
and a customer return order number from Telenetics. In no event shall Telenetics be liable  
for any consequential or incidental damages.  
Products which have been subject to abuse, misuse, accident, alteration, neglect,  
unauthorized repair or installation are not covered by the warranty. Telenetics shall make  
the final determination as to the existence and cause of any alleged defect. No liability is  
assumed for expendable items such as lamps and fuses. No warranty is made with respect  
to custom products or Products produced to Customer's specifications except as specifically  
stated in writing by Telenetics in the agreement for such custom products.  
This warranty is the only warranty made by Telenetics with respect to the goods delivered  
hereunder, and may be modified or amended only by a written instrument signed by a duly  
authorized officer or Telenetics and accepted by Customer.  
This warranty and limitation extends to customer and to users of the product and is in lieu  
of all warranties with respect to the product whether express, implied, or statutory,  
including without limitation the implied warranties of merchantability and fitness for a  
particular purpose.  
Page 43  
 
Appendix F  
RMA Procedure  
Return Merchandise Authorization (RMA) Procedure  
Before returning any Telenetics product, an RMA number must be obtained.  
Before asking for an RMA number, ascertain that the product was purchased from  
Telenetics. If you bought the product from a Distributor or Systems Integrator, the  
product should be returned to that vendor.  
The most convenient method to obtain an RMA number for a product purchased from  
Telenetics is to send an email to [email protected]. Information required must  
include  
Your Company Name, address, the actual address that we would use to return the product  
to you. Please include any Mail Stop or specific delivery information. The City, State,  
and zip code are all required. Your phone and FAX numbers. Your email address.  
If the above information is on your letterhead, that format is acceptable.  
For each item you wish to return: List the product model number, usually found on the  
serial number tag, the serial number for each item you wish to return, a description of the  
problem you are encountering, and the cause of the problem (if known).  
A product support specialist may call to verify that the product is properly installed or  
may ask you to perform tests to insure that the product has actually failed.  
After review of the problem, an RMA number will be assigned, you will be notified by  
email or FAX.  
The product must be properly packed and returned to:  
Telenetics  
25111 Arctic Ocean  
Lake Forest, CA 92630  
The RMA number must be legibly displayed on the shipping carton.  
No RMA’s will be issued without a product review, Telenetics will not be responsible for  
any product returned without an RMA number.  
In the near future the RMA form will be available on our Web site  
Telenetics.com/support/rma. Fill in all blanks and click on the “Submit” button.  
If you think the product may be out of warranty, include a method of payment for repairs,  
either a Purchase Order number, or Credit card number, Card Holder Name, Date of  
Expiration on the RMA request. Repairs currently require 5 – 10 working days, and are  
returned UPS second day air.  
Page 44  
 
RMA Procedure  
Page 45  
 

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