Port details CUCM to OCS

Unanswered Question
Mar 10th, 2010

Hi,

We have configured SIP trunk between CUCM to OCS and in between we have firewall. what are all the ports i need to allow in firewall for call establiishment between IP phone to Office communicator. Hope CUCM RTP media stream uses 16384-32766 UDP correct me if i am wrong.

1) What would be the source port range if a call is intiated from Office communicator.

2) What would be the source port range if a call is intitaed from Cisco IP phone.

3) CUCM to OCS SIP trunk port details?

Thanks in advance.

Regards,

Pradeep

I have this problem too.
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