Lucent Technologies DEFINITY Extender Switch Module System Administrators Guide

Installation
Issue 3   July 1997   3-17
Figure 3-4.  RS-232 Cable Pin Connections
NOTE:
The DEFINITY Extender modules use the CTS lead for flow
control. When the internal buffer is 32 characters from full, the CTS
lead is turned off. While CTS is off, up to an additional 32
characters can be transmitted without any loss of data. If hardware
flow control is not enabled or if a cable without the CTS lead is
used, characters will be lost when this buffer overflows.
The DEFINITY Extender modules use the DCD...

Issue 3   July 1997   4-1
Troubleshooting
4
Troubleshooting and LED Activity
As with all equipment of a sophisticated nature, occasionally an
error in connection or transmission may occur. The DEFINITY
Extender system provides indication of any errors via light-emitting
diodes (LEDs) on the Remote and Switch Modules and by error
messages on the display telephone connected to the Remote
Module. 

Troubleshooting
4-2   Issue 3   July 1997
Troubleshooting
When an error occurs in the operation of the Switch Module, you
should check for malfunctions in an organized manner. Follow
these steps when troubleshooting the Switch Module:
1. Check all interconnecting cables to ensure that they are
properly seated.
2. Verify that the DIP switches are set correctly.
3. Check the circuits to ensure that they are free of noise and
meet the specifications listed in Chapter 1, Introduction.
4. Verify that the...

Troubleshooting
Issue 3   July 1997   4-3
LED Sequences
The LEDs on the Standalone Switch Module and the Rack-Mount
Switch Module help to indicate problems that occur.
Standalone Switch Module
The following flash sequences may be observed on the Standalone
Switch Module:
n1 Green: Online to Remote Module
n2 Green: Dial mode; waiting for ring
n3 Green: Leased line mode; waiting for connect sequence
n4 Green: Dial mode connect sequence
n3 Red: Waiting for PBX connection
n3 Yellow: Test mode
NOTE:
During...

Troubleshooting
4-4   Issue 3   July 1997
Multi-Mount Rack
The Multi-Mount Rack’s LED blink sequence helps to identify a
malfunctioning interface card. Problem cards are identified by a
red/green blink in the LED blink sequence. Table 4-1 shows the
LED blink sequences for the Rack-Mount Switch Module The
sequences are listed in the order of priority.
Table 4-1. Rack-Mount Module LED Blink Sequence
LED Sequence Meaning
RGRG Module has been flagged by Remote user. A
Remote Module user can flag a...

Troubleshooting
Issue 3   July 1997   4-5
Table 4-1. Rack-Mount Module LED Blink Sequence
(
Continued)
LED Sequence Meaning
RRG Module has detected at least one ring but is
waiting for a ring on analog line connection.
Since power-up or since diagnostic counts have
been reset, the Rack-Mount Module has not
been successfully connected to the Remote
Module.
RGG Module is waiting for ring on analog line. The
Rack-Mount Module has had at least three
connect sessions with a Remote Module, but
each session has...

Troubleshooting
4-6   Issue 3   July 1997
Error Messages
If a problem has been encountered during the connection process,
an error message appears on the remote telephone. Table 4-2
shows the error messages and the suggested actions to take.
Table 4-2.  Error Messages
Message Cause Action
No Dial Tone The Remote Module
is not properly
connected to the local
telephone company.Connect a regular
telephone to the
telephone company jack,
and listen for dial tone.
Make sure the line is
properly connected to...

Troubleshooting
Issue 3   July 1997   4-7
Table 4-1.  Error Messages—
Continued
Message Cause Action
No Answer
ToneThe Switch Module is
not responding. The
Remote Module does
not receive a Ring-
Back Tone or an
Answer Back Tone.Verify that the correct
telephone number has
been programmed.
Verify that the Switch
Module is connected to
the line.
Rate Too
SlowThe rate at which the
modem is connecting
is not fast enough to
allow for successful
operation of the
system.Have the local telephone
company lines...

Troubleshooting
4-8   Issue 3   July 1997
Specific Problems
Problems that may develop with the DEFINITY Extender system
usually reflect what type of line is being used, dial line or dedicated
line. In either case you should try the Switch Modules at the
DEFINITY ECS location so you can determine if the problem is with
the Switch Module or with the communications system.
Dial Line Problems
The following problems may occur with Switch Modules connected
to analog dial lines. The possible steps to solve the...

Troubleshooting
Issue 3   July 1997   4-9 No Connection/No Answer
Tone
To correct this problem, answer or do the following:
1. Does the display on the telephone say “Go Online”? If so, press
2 to start the session. (A new user may never have seen the
Remote Module off-line before.)
2. Check the power connection on the Switch Module.
3. Check the LED on the Switch Module and compare it to the
LED diagnostic sheet. The Switch Module may be defective.
4. Check that the DIP switches on the Switch and Remote...