REINVITE with Auth Credentials has different SDP Codec

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What am I doing wrong…to get no responses at all

Thx

From: href=”mailto:asterisk-users-bounces@lists.digium.com”>asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Ujjval Karihaloo
Sent: Thursday, October 07, 2010 7:35 PM
To: Asterisk Users Mailing List – Non-Commercial Discussion
Subject: [asterisk-users] REINVITE with Auth Credentials has different SDP Codec

Hi I have a call from Service Provider (SP) to Asterisk to User

User sends a T38 REINVITE

Asterisk passes that to SP

SP challenges the INVITE

Asterisk sends INVITE with credentials but sends G711ulaw in the SDP instead of T38 udptl…

Obviously Fax fails..

Any ideas on how I can maintain the T38 SDP when SP challenges the mid-Call T38 REINVITE?