Why not use a proxy, in theory it should pass through t.38 just fine since it doesn't get involved in the RTP streams at all. Is there a reason you need support DIRECTLy into asterisk. I was thinking about adding proxy support to chan_sip for some time now, but have ended up making a stand alone proxy solution, and a universal system to authenticate users via asterisk or my proxy system, as well as DIDs etc. This way I can hand off my sip connections to asterisk if needed for voicemail etc, but most of the times my calls just pass through my proxy server only.

Preston Garrison
direct: 877-748-4142
fax: 310-774-3901
cell: 623-748-4140

-----Original Message-----
From: Matthew Simpson <[EMAIL PROTECTED]>
To: [email protected]
Cc: [email protected]
Sent: Sat, 28 May 2005 22:12:56 -0500
Subject: [Asterisk-biz] T.38 pass-through / T.38 support

Hello,

I am looking for a programmer(s) that would like to be paid to implement either:

1) T.38 pass-through support for chan_sip in Asterisk

or

2) T.38 support defined as:

1. support for cisco-interop T.38 from Zap channel to SIP [call originates on Zap channel, your T.38 implementation would convert Zap channel data to SIP RTP T.38 protocol to Cisco AS5400 HPX through Asterisk -- I can give you access to a test Cisco as well as Asterisk with Zap ISDN channels]

2. support for SIP using cisco-interop T.38 back to Zap [call comes into Asterisk on chan_sip via T.38, converted back into Zap channel over ISDN PRI to end-user fax].

3. T.38 pass-through support for SIP-->SIP calls, meeting cisco-interop standards

Your T.38 support only needs to be Cisco compatible, and work smoothly between SIP and Asterisk Zap channels.

We are an established company with a budget big enough to compensate for this work fairly. Please contact me via email if you have a solution for sale now, or with any proposals to create one for us. If you submit a proposal, I need you to include a pricing quote as well as reasonable time to completion.

Yours,
Matthew Simpson
TxLink Communications
91,000 NPA/NXX for 0.005/min and counting...
http://www.txlink.net/


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