[Configure a SPA112 for a Fax with SnomOne 5.2]

If you try G.711, make sure that you turn echo cancellation off on the SPA. Otherwise the echo canceler will kill the FAX signal.

 

Yes I've already turn off echo cancellation (without better results)

 

Fax was not designed for packet networks. It can deal with distortion and lots of analog problems, but if a whole piece (packet) gets lost, it is the end of the transmission. Nobody will change that for you in the year 2014 any more.

OK, and my trunk provider says: G711 protocol should give satisfactory results... (for me it's catastrophic)

anyway, It doesn't explain the outgoing call failure on line 2.. yes ?

[Configure a SPA112 for a Fax with SnomOne 5.2]

 

Well honestly, then change the trunk provider. If you need to receive FAX, T.38 is a must-have. If you don't have it we all will go through a long, frustrating experience of FAX not going through randomly or not at all. We also have a SPA112 here, will add it to the provisioning process to make life easier for the next customers who set this device up.

I just made a request (again) to my service provider for the protocol "T38". In attentadnt, is there any solutions for reliable operation with g711?

Traces I provided does not indicate a configuration problem ?

thank you

[Configure a SPA112 for a Fax with SnomOne 5.2]

 

Hello,

I can't register a spa112 with my snomone pbx
I don't know what is the problem.
Here a log from the server:

 

REGISTER sip:100.64.0.49 SIP/2.0
Via: SIP/2.0/UDP 192.168.215.40:5060;branch=z9hG4bK-cedabad4
From: "556" <sip:556@100.64.0.49>;tag=50af8cc356fe346o0
To: "556" <sip:556@100.64.0.49>
Call-ID: 441e8cfa-daaa8395@192.168.215.40
CSeq: 1467 REGISTER
Max-Forwards: 70
Contact: "556" <sip:556@192.168.215.40:5060>;expires=3600
User-Agent: Cisco/SPA112-1.3.3(015)
P-Station-Name: ;mac=34dbfd5c1389; display=""; sn=CCQ174101ZI
--
SIP/2.0 404 Not Found
Via: SIP/2.0/UDP 192.168.215.40:5060;branch=z9hG4bK-cedabad4
From: "556" <sip:556@100.64.0.49>;tag=50af8cc356fe346o0
To: "556" <sip:556@100.64.0.49>;tag=0a6a3267ec
Call-ID: 441e8cfa-daaa8395@192.168.215.40
CSeq: 1467 REGISTER

Thanks