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Chapter 7 - Troubleshooting
External Composite Link Device
Problem
Composite link down with CTS,
XMT and RD LEDs on
Composite link down with CD,
CTS, XMT, RCV and RD LEDs
on
Flashing RXT LED
Composite link down with CD,
CTS and RD LEDs on
Possible Causes
Composite link not communicating
with communications line
Faulty communications line
Composite link not configured
correctly
High error rate on communication
line
External device settings
Solutions
1. Verify EXT LED is on. If off,
ensure that DIP-Switch #2 is
in the Closed (down) position.
2. Verify that calbe is connected
to External Composite
RS232C/V.35 connector.
3. Verify composite link
configuration (see Composite
Link Settings - External
Device in Table 7-8).
1. Call phone company and
verify communication line.
2. Call Tech Support for
assistance (see Chapter 8).
1. Vereify composite link
configuration (see Composite
Link Settings - External
Device in Table7-8).
1. View composite link statistics
(refer to Table 7-9)
2. Perform composite link
loopback tests (see
Diagnostic Testing in Table 7-
12).
3. Call phone company and
verify communication line.
4. Call Tech Support for
assistance (see Chapter 8).
1. Verify that external device is
set for sync, full duplex, and
internal clocking.