Specifications
240 IBM Voice Over Frame Relay Perform Guide
PROBLEM: Changes made in voice parameters are not taking effect.
Cause: Voice port configuration changes have occurred during
off-line state.
Response: Turn the voice port offline, then back online.
PROBLEM: Long voice and call setup delay (5-10 sec).
Cause: A data port is configured for a speed that is too low, for
example, 6400 bps instead of 64000 bps.
Response: Set the data port to the correct speed.
PROBLEM: RS-422 or V.35 port is inoperable.
Cause: If an RS-232 cable is connected to a port configured for
RS-422 or V.35 operation, lockup or damage can occur to
the port.
Response: Perform a power cycle to the unit to fix a lockup problem. If
this does not solve the problem, the port is probably
damaged.
G.9 Solving Voice Problems in the IBM 9783
If voice data is not reaching the intended destination, perform the following
procedures to identify and resolve the
problems.
G.9.1 System Status Check
The first step in identifying problems with voice data is to perform a system status
check. To do this, perform the following steps:
1. Enter the command:
SHOW STATUS UNIT
2. If the IBM 9783 unit responds with an ALARMS CLEARED prompt, the
problem is not with the unit. Go to G.9.2, “Basic Frame Relay Connectivity
Check” on page 240. If a Fatal Error message appears:
• Enter the
UNIT RESET command. (Resetting the unit takes approximately five
minutes.)
• Enter the
SHOW STATUS UNIT command again.
• If the error message continues, contact IBM.
G.9.2 Basic Frame Relay Connectivity Check
If the system status check failed to identify the voice problem, perform a basic
frame relay connectivity check. This check consists of two procedures:
• Evaluating the end-to-end frame relay connection
• Evaluating the permanent virtual connection (PVC)
G.9.2.1 Evaluating the End-to-End Frame Relay Connection
Issue the SHOW STATUS DATA command. If the Layer-3 LMI Status is operating
properly, go to G.9.2.2, “Evaluating the PVC” on page 241. Otherwise, check the
frame relay data port setup.