SIP Profile: Before I build the trunk to my CUBE router, I will need to build a SIP Profile so that I can easily monitor the status of the trunk. Navigate to Device > Device Settings > SIP Profile and click find. Open the Standard SIP Profile and click the Copy button.
Once you’ve started building your copy, change the name to identify it as being built for the CUBE. We will go ahead and change the Early Offer support for voice and video calls to Best Effort, and then check the box to Enable OPTIONS Ping. Finally, click save.
SIP Trunk: Now we can go ahead and set up the SIP Trunk to the CUBE. Now, I have already set up my CUBE, but I plan to erase it and rebuild for another post, but for now my trunk will come up, but if you’re following along, yours won’t. Navigate to Device > Trunk and click Add New.
For Trunk Type select SIP Trunk, and then the rest will auto-fill, so just click Next.
Once on the Trunk Configuration page, first give the Trunk a name and description. Select our Device Pool that we built. Check the box for PSTN Access. Enter our CUBE IP address. Select the SIP Trunk Security Profile (there’s only one), then the SIP Profile that we just built. Finally, lets set DTMF to RFC 2833, and then click save. SIP Trunks tend to take a while to establish in CUCM, so lets give it a minute. If you’re really wanting to know what’s going on, you can head over to your CUBE (if you have at least the basic configurations) and run debug ccsip messages to watch the SIP messages.
There you go. Your CUCM is now talking to your CUBE. Now, of course, this doesn’t mean your CUCM knows how to send calls to it yet. For that, you’ll want to check out the lab post(s) about configuring a call.