Configuring Voice Services
Optimizing Fax Completion Rates
Cisco Small Business WRP400 Administration Guide
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3
NOTE
If a T.38 call cannot be set-up, then the call automatically reverts to G.711
fallback.
STEP 5
If you are using a Cisco media gateway use the following settings:
Make sure the Cisco gateway is correctly configured for T.38 with the SPA dial
peer. For example:
fax protocol T38
fax rate voice
fax-relay ecm disable
fax nsf 000000
no vad
Fax Troubleshooting
If you have problems sending or receiving faxes, complete the following steps:
STEP 1
Verify that your fax machine is set to a speed between 7200 and 14400.
STEP 2
Send a test fax in a controlled environment between two ATAs.
STEP 3
Determine the success rate.
STEP 4
Monitor the network and record the following statistics:
•
Jitter
•
Loss
•
Delay
STEP 5
If faxes fail consistently, capture a copy of the voice settings by selecting
Save As
>
Web page, complete
from the administration web server page. You can send
this configuration file to Technical Support.
STEP 6
Enable and capture the debug log. For instructions, refer to
Appendix D,
“Troubleshooting.”
NOTE
You may also capture data using a sniffer trace.
STEP 7
Identify the type of fax machine connected to the ATA device.