I have a problem with the Fax-Server and Cisco 2811 as H.323 Gateway. I can see the incoming fax-calls on the Cisco 2811. First, the call does connect with G711?law to the Fax-Server. After then the session changes from G711?law to T.38. The Problem is that the Cisco 2811 does not send fax-data to the Fax-Server. The T38 stream is empty. Before we have shipped the Router to the US, we tested the config in Germany with an E1-line. The test was successful (sending and receiving faxes). I think we have a problem with the T1 but i don`t see a mistake in the config.
T1 line from AT&T:
Service Type: Voice Only
IDSN Version: National 2
Arrangement: PRI Voice Only CBC/CPN
D-Channel Configuration: D Channel per T
Channel Type: DID/DOD
Pulse Type: DTMF
DS1 Termination: Smartjack
Therefore I ask for assistants, can you help us, please.
with kind regards