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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
Example 6-6 Cisco ATA Configuration Failure
---------- FAX Summary 1 ----------
[ 37]<2.53=>3.200> Codec G723
[ 39]<3.200=>2.53> Codec G723
Analysis
• <2.53> is the originating gateway and <3.200> is the terminating Cisco ATA.
• The Cisco ATA and the <2.53> gateway use G.723 codec.
Possible Causes for Failure
• The Cisco ATA is not configured with fax mode or fax pass-through mode.
• If the Cisco ATA is the gateway for a fax sender, the remote gateway is not configured with fax
pass-through mode.
Example 6-7 Fax Mode Failure
---------- FAX Summary 1 ----------
[ 37]<2.53=>3.200> Codec G711
[ 39]<3.200=>2.53> Codec G711
[ 1820]<2.53=>3.200> NSE PT 96, Cisco Fax Relay
[ 1966]<2.53=>3.200> NSE PT 96, Cisco Fax Relay
Analysis
• <2.53> is the originating gateway and <3.200> is the terminating Cisco ATA.
• The Cisco ATA and the <2.53> gateway begin with G.711 codec.
• The <2.53> gateway sends Cisco fax relay event packets.
Possible Cause for Failure
• Cisco fax relay option is not disabled on the gateway.
Example 6-8 Fax Pass-through Mode Failure
---------- FAX Summary 1 ----------
[ 2]<2.53=>3.200> Codec G723
[ 4]<3.200=>2.53> Codec G723
[ 106]<3.200=>2.53> Codec G711u/D
[ 107]<3.200=>2.53> NSE PT 100, EVT 192: Up-Speed, CED tone Detected
[ 1436]<3.200=>2.53> NSE PT 100, EVT 192: Up-Speed, CED tone Detected
Analysis
• <2.53> is the originating gateway, and <3.200> is the terminating Cisco ATA.
• The Cisco ATA upspeeds to G.711µ-law and sends G.711 upspeed NSE signaling packets.
• The <2.53> gateway does not respond to the NSE signaling packets.