[Asterisk-Users] SIP, Microsoft RTC, and Originate problem

[Ohad.Levy at infineon.com]

Hi,

 

What is your setup? By MS RTC do you mean Office Communicator?

If you are using MS OC, do you use SER in between (to convert SIP
UDP2TCP)? Please share some more details :-)

 

Cheers,

Ohad

 

________________________________

From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Asterisk
Sent: Wednesday, June 14, 2006 9:43 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [Asterisk-Users] SIP, Microsoft RTC, and Originate problem

 

It seems that Microsoft RTC has some problems with originated calls from
Asterisk. If I execute Manager API originate application, with SIP
channel as parameter, the Microsoft RTC softphone will start to ring
after a couple of seconds delay, but nothing more happens after when I
answer - there is no second call to an extension.

 

When I looked through the sip debug, I noticed that Microsoft RTC fails
to properly respond to INVITE messages (I have attached the sip debug).
Asterisk has to retransmit INVITE message for 6 times and even then the
RTC still doesn't respond in a proper time. However, if I do direct call
to that problematic Microsoft RTC based softphone, everything works
fine, eventhough very same INVITE messages are being transmited to it
from Asterisk.

 

Does anyone have any ideas for a workaround?

 

Regards,

Alex

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