How to make incoming calls from SIP client to OCS 2007 R2
Sunday, May 31st, 2009Lately, I’ve been experimenting with Office Communication Server (OCS) 2007 R2. I’m checking voice routing between OCS and PSTN. It took me some time to enable incoming calls from a SIP client to reach an OCS communicator so I though I’ll share it with others who are facing the same issue.
First of all, you’d need a SIP client. Normally I use X-Lite but since OCS requires TCP as an underlying protocol to transfer SIP, I used the latest 4.0 version of X-Lite. After installation, setup your account; click on the Transport tab and choose TCP as the signaling transport.
Now let’s go to the front end server of OCS 2007 R2. Go to the users list (Forest, Enterprise pools, choose the relevant pool and click on ‘Users’ directory), double-click on a user name and select “Configure…” for “Telephony Settings:”. Enter a unique phone number in “Line URI:” field with the format tel:+<country code><Area code><number>. Press OK and you’re good to go!
Alrighty then. Go back to your SIP client and type the number (don’t forget the plus sign). Your communicator will ring. answer it. Yey.
