[asterisk-users] Getting channel 'SIP/192.168.1.69-00000000' refused to negotiate T.38

[Kevin P. Fleming]

On 06/22/2012 12:05 PM, Ahmed Munir wrote:
>
> Here is my setup;
>
> Fax machine -> PSTN -> Cisco Voice GW -> IP cloud -> Asterisk. As on
> Cisco Voice GW, T.38 fax already configured on SIP protocol.

Apparently your configuration of the 'Cisco Voice GW' was not 
successful, as it refused to accept a re-INVITE from Asterisk that 
wanted to switch the SIP channel to T.38 mode.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
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