415 Error with SIP trunk and Exchange Server 2007

Hello.

I need to understand the source of my problem with SIP trunk and
Microsoft Exchange Server 2007 (Unified Messaging feature). I have a
PBX Aastra/Ericsson MX-ONE that receive an SIP response 415 -
Unsupported Media Type from Exchange UM Server.

Here the conversation packets when I try to call de Exchange UM from
an analog extension:

PBX > Exchange | INVITE
sip:user@exchangeserver,user=phone,transport=tcp; (default port 5060)
Exchange > PBX | 100 Trying;
Exchange > PBX | 302 Moved temporarily; (because Exchange UM works
with two processes)
PBX > Exchange | ACK sip:user@exchangeserver,user=phone,transport=tcp;
PBX > Exchange | INVITE
sip:user@exchangeserver:5065,user=phone,transport=tcp; (the port 5065
is for UMWorkerProcess.exe, on UM Server).
Exchange > PBX | 100 Trying;
Exchange > PBX | 180 Ringing;
Exchange > PBX | 200 OK;
PBX > Exchange | ACK
sip:<UM_Server_FQDN>:5065,transport=tcp,maddr=<UM_Server_IP_address>;
PBX > Exchange | INVITE
sip:<UM_Server_FQDN>:5065,transport=tcp,maddr=<UM_Server_IP_address>;
Exchange > PBX | 100 Trying;
Exchange > PBX | 415 Unsupported Media Type;
PBX > Exchange | ACK
sip:<UM_Server_FQDN>:5065,transport=tcp,maddr=<UM_Server_IP_address>;
PBX > Exchange | BYE
sip:<UM_Server_FQDN>:5065,transport=tcp,maddr=<UM_Server_IP_address>;

Can anynone help me?

Best regards.

-- 
Att,

Fernando



-- 
Att,

Fernando
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