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ATA187, SIP trunks, CUBE

Hi,

What dial-peer fax statements would be advised in a case where the ITSP (SIP Trunking) only supports g711a pass though for fax?
We are having a hard time making outbound faxes work reliably from a ATA187.
How much 'relay' can/should the gateway do in this case (to my understanding there is no 'relay' in this case)?
Should we rely solely on the ATA187 configuration in CUCM and the settings on the fax machine ? (Speed, ECM, etc)

Gateway/CUBE 15.3, CUCM 9.1.1a

Regards,
Erik

Sent from Cisco Technical Support iPhone App

2 REPLIES

ATA187, SIP trunks, CUBE

The following is an example config you can make use of with an SIP enviroment.

voice service voip

allow-connections h323 to h323

allow-connections h323 to sip

allow-connections sip to h323

allow-connections sip to sip

no supplementary-service sip moved-temporarily

no supplementary-service sip refer

fax protocol pass-through g711alaw

h323

modem passthrough nse codec g711alaw

sip

  registrar server expires max 3600 min 3600

  asserted-id pai

  privacy pstn

  options-ping 60

  midcall-signaling passthru

dial-peer voice 200 voip

description -----  WYCHODZACE SIP-T ------

destination-pattern [1-9]........

modem passthrough nse codec g711alaw

session protocol sipv2

session target ipv4:SIP-SRV:5020

voice-class codec 23 

voice-class sip dtmf-relay force rtp-nte

voice-class sip early-offer forced

voice-class sip pass-thru headers unsupp

voice-class sip pass-thru content unsupp

voice-class sip pass-thru content sdp

dtmf-relay rtp-nte

req-qos controlled-load audio

fax-relay ecm disable

fax protocol pass-through g711alaw

no vad

!

dial-peer voice 101 voip

description **Outgoing Call to CUCM**

destination-pattern 895216...

session target ipv4:CCM1

voice-class codec 1 

voice-class h323 1

voice-class sip dtmf-relay force rtp-nte

voice-class sip early-offer forced

dtmf-relay h245-alphanumeric

fax protocol pass-through g711alaw

!

Voice CCIE #37771

Re:ATA187, SIP trunks, CUBE

The ATA-187 does support pass through on a specific firmware of the ATA, that would 9.2.3.1 supports both T.38 and modem pass through.

https://supportforums.cisco.com/thread/2189681

Hope this link helps.

Regards,
Kevin



Sent from Cisco Technical Support Android App

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