Search This Blog

Thursday, March 22, 2012

Cisco ATA 187 and fax

ATA 187 does not work well with some fax devices, in our case it is Xerox 7228. The config that works (little bit weird): enable t38 on outgoing and disable on incoming
!
dial-peer voice 300 voip
no modem passthrough
session target ipv4:192.168.25.1
incoming called-number 0T
voice-class codec 1
voice-class h323 1
dtmf-relay h245-alphanumeric
fax-relay sg3-to-g3
fax nsf 000000
fax protocol t38 version 0 ls-redundancy 5 hs-redundancy 2 fallback pass-through g711ulaw
no vad
!
dial-peer voice 200 voip
destination-pattern 5..
session target ipv4:192.168.25.1
voice-class codec 1
voice-class h323 1
dtmf-relay h245-alphanumeric
fax-relay sg3-to-g3
fax nsf 000000
fax protocol pass-through g711ulaw
no vad
!

update: moved from ATA to FXS card in router and all issues are gone - isn't it a magic? Heh, Cisco?  :)
update2: Cisco made available configurations scenarios: https://supportforums.cisco.com/docs/DOC-25210

3 comments:

Daniyar said...

how to debug fax on gw: https://supportforums.cisco.com/thread/2061933

1. Debug voip ccapi inout

2. Debug isdn q931 ( if pri)

3. Debug voip rtp session nse

4. Debug voip rtp session named events

Daniyar said...

and another one http://docwiki.cisco.com/wiki/Cisco_IOS_Voice_Troubleshooting_and_Monitoring_--_Fax_Relay

Daniyar said...

apparently clock sync is important for faxes, so:

network-clock-participate wic 0
network-clock-participate wic 1
network-clock-select 1 BRI0/0/0
network-clock-select 2 BRI0/0/1

should be added to gw config.