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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.