Avaya Support Forums  

Go Back   Avaya Support Forums > IP Telephony and Convergence

Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 12-16-2019, 02:01 AM
rime rime is offline
Join Date: Dec 2011
Posts: 66
rime has 10 reputation points
Default T.38 fax for fax server connected with ISDN PRI to G450

With a fax server connected via ISDN PRI (QSIG) to a G450 Media Gateway, is it possible to have the Media Gateway accepting a T.38 connection with the remote side on the public telephone network, connected over a SIP trunk? At this point I have the Media Gateway rejecting T.38 and negotiating G.711 but then the fax transmission fails. With an analog fax connected to the G450, the G.450 recognizes the fax tones and accepts T.38 but with a fax server connected over ISDN, I do not know if the G450 Media Gateway can terminate the T.38 flow and convert to PCM A-law for the ISDN QSIG connection to the fax server.

signaling flow
fax server <--- ISDN PRI (QSIG) ---> G450 <--- H.248 ---> CM 6.3 <--- SIP ---> SM 6.3 <--- SIP ---> Audiocodes Mediant 1000 <--- SIP ---> public telephone network <--- T.38 ---> fax

media flow

fax server <----- ISDN PRI (QSIG) ---> G450 <---> Audiocodes MP1000 <--- SIP service provider ----> T.38 fax

Thanks in advance!
Reply With Quote

fax, isdn, t.38

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 05:36 PM.

This Forum is provided solely for the use and convenience of Avaya customers and partners. Use of the Forum is subject to the Terms and Use and Privacy Statement found at www.avaya.com. No other use is permitted. The Forum including all content posted is “AS IS” and Avaya expressly disclaims all warranties and/or guarantees as to its accuracy, reliability, usefulness, quality or non-infringement of intellectual property. Avaya reserves the right to remove any content posted on the Forum at any time and for whatever reason.

Avaya will not be liable for any content posted on this Forum, including, without limitation, any errors or omissions or for any losses or damages of any kind incurred as a result of use or reliance on any content, regardless of its origin.

You expressly understand and agree that you assume all risks associated with use or reliance on this content.