Cisco ATA186-I1 Administrator's Manual page 118

Debugging the Cisco ATA 186/188 Fax Services
Table 6-1
Problem
The far-end gateway is not
loaded with correct
software image.
The Cisco IOS gateway is
not configured using the
external T1 clock.
The Cisco ATA is not
loaded with the proper
software.
User is operating
Cisco ATA software on an
outdated model.
The Cisco ATA is not
configured for fax mode or
fax pass-through mode.
The remote gateway is not
configured for modem/fax
pass-through mode.
Fax relay is not disabled
on the remote gateway.
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for SCCP (version 3.0)
6-8
Solving Common Fax Problems
Action
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.
Perform these steps:
Enter the following CLI commands:
1.
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."
Cisco recommends using software version 2.14 or higher.
Cisco recommends using Cisco ATA models 186-I1, 186-I2, 188-I1, or
188-I2 (hardware platforms).
For fax mode, the AudioMode configuration parameter should be set to
0xXXXX0012 (X = value not applicable) for the Phone 1 port of the
Cisco ATA, and 0x0012XXXX for the Phone 2 port.
For fax pass-through mode, AudioMode should be set to 0xXXXX0015
for the Phone 1 port of the Cisco ATA, and 0x0015XXXX for the Phone
2 port.
When the Cisco ATA is configured for fax pass-through mode, all remote
gateways must be configured with modem/fax pass-through mode either
on a dial-peer level or system level.
Fax relay is enabled by default on some Cisco gateways. When fax relay
is enabled, it can override fax pass-through mode and cause fax failure.
Examples of the CLI commands to disable fax relay for IOS gateways are
as follows:
fax rate disable for H.323/SIP gateways
•
• mgcp fax t38 inhibit for MGCP gateways
Chapter 6 Configuring and Debugging Fax Services
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