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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)
OL-4803-01
Chapter 6 Configuring and Debugging Fax Services
Debugging the Cisco ATA 186/188 Fax Services
Configuring the Cisco IOS Gateway for Fax Mode
On the Cisco gateway, disable both fax relay and fax pass-through at the dial-peer level or system level
with the following commands:
Procedure
Step 1 Run the command:
fax rate disable
Step 2 Run the command:
no modem passthrough
Debugging the Cisco ATA 186/188 Fax Services
This section includes the following debugging topics for fax services:
• Common Problems When Using IOS Gateways, page 6-7
• Using prserv for Diagnosing Fax Problems, page 6-8
• Using rtpcatch for Diagnosing Fax Problems, page 6-12
Common Problems When Using IOS Gateways
Table 6-1 lists typical problems and actions that might solve these problems for situations in which the
Cisco ATA is using fax over a Cisco IOS gateway.
Table 6-1 Solving Common Fax Problems
Problem Action
The far-end gateway is not
loaded with correct
software image.
Cisco recommends IOS version 12.2 (11)T or higher for the Cisco 2600
and Cisco 3600, and IOS version 12.1 (3)T or higher for Cisco AS5300.
The Cisco 6608 supports both the NSE and NTE methods of fax
pass-through mode, beginning with software version
D004030145S16608. To use fax pass-through mode with the Cisco 6608,
the user must select 6608 NSE mode, and the NSE payload type must be
reconfigured to match the Cisco ATA.
The Cisco IOS gateway is
not configured using the
external T1 clock.
Perform these steps:
1. Enter the following CLI commands:
Controller T1 0
clock source line
2. On the Cisco CallManager Gateway Configuration page, choose the
T1 line connection port. Set the clock as “external primary.”