Cisco Systems ATA 186 Analysis, Possible Cause for Failure, Possible Causes for Failure, 6-18

Chapter 6 Configuring and Debugging Fax Services

Debugging the Cisco ATA 186/188 Fax Services

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.

Possible Causes for Failure

•Fax/modem pass-through option is not enabled on the gateway.

•Fax/modem pass-through NSE payload type are configured differently on the Cisco ATA and the gateway.

Example 6-9 Fax Pass-through Mode Failure

---------- FAX Summary 1			----------
[	37]<2.53=>3.200>	Codec G723
[	39]<3.200=>2.53>	Codec G723
[	143]<3.200=>2.53>	Codec G711u/D
[	144]<3.200=>2.53>	NSE	PT 100,		EVT 192: Up-Speed, CED tone Detected
[ 1602]<3.200=>2.53>		NSE	PT 100,		EVT 192: Up-Speed, CED tone Detected
[ 1604]<2.53=>3.200>		Codec G711u/D
[ 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 upspeeds to G.711µ-law and sends G.711 upspeed NSE signaling packets.

•The <2.53> gateway upspeeds to G.711µ-law and then sends Cisco fax relay event packets.

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)

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