not communicating
not installed on Supervisory
supervisory console, refer to comm
with mux command
Console.
software users manual forinstallation.
port
2. Bad cable or cable
1. Check RS232 cable connections
connection
between supervisory
console and COMMAND PORT on
MultiMux for loose connection or
bent pins, refer to Supervisory
Console Installation procedures in
Chapter 4
2. Check RS232 cable connections
between supervisory console and
COMMAND PORT on MultiMux for
correct cable wiring, refer to Cable
Diagrams in Appendix
C.
Supervisory Console
1. Incorrect command
1. Verify command modem baud rate is
not communicating
modem baud rate
set to 2400 bps, refer to Comm
with command mode
Software
Users Manual.
2. Call Tech Support for assistance,
refer to Chapter 8
Garbage on
1. Incorrect session
1. Verify session parameters (data bits
Supervisory
parameters
of 8, parity none, 1 stop bit), refer to
Console Screen
comm
software users manual for
parameter settings.
2. Call Tech Support for assistance,
refer to Chapter 8
Composite Link down
1. Composite Link cabling
1. If internal DSU is installed, check
with CTS, XMT, and
Composite Link cabling for loose
RD LEDs ON
connection.
2. If external DSU or modem is
installed, check RS232C/V.35 cable
between devices for loose
connection or bent pin.
2. Not receiving data from
1. Verify that both muxes are powered
remote mux
ON.
2. Verify that both muxes are
connected to communications line.
Table 7-1. Data Troubleshooting Guide(Continued)
Condition
Possible Cause
Corrective Action
Composite link down
2. Not receiving data from
3. If external modem are used, verify
with CTS, XMT and
remote mux (Continued) that they are powered ON and
RD LEDs ON
connected to the communication
(Continued)
line and Mux composite link.
4. Call Tech Support for assistance,
refer to Chapter 8.
3. Faulty communication line 1. Call phone company and verify
communication line.
2. Call Tech Support for assistance,
refer to Chapter 8.
Composite Link down
1. Both Muxes set up for
1. Remove front cover of both muxes
with CD, CTS, XMT and
down line loading
and verify if DIP-Switch 1 is in the
RCV LEDs ON and
UP (ON) position.
RD LED ON
2. Place DIP-Switch 1 on one of the
muxes in the DOWN (OFF) position.
3. Call Tech Support for assistance,
refer to Chapter 8.
2. Internal DSU speeds
1. Verify internal DSU speeds with
$L
on local and remote
command, refer to Chapter 5.
muxes do not match.
Composite link down
1. External modem settings
1. Verify that external modem is set for
with CD, CTS and
remote mux
sync, full duplex and internal clocking.
