Next let’s build the SIP phone in CUCM 1) Go to DEVICE | PHONE and click ADD NEW 2) Select THIRD-PARTY SIP DEVICE (BASIC) and click NEXT 3) Enter in a 12 digit MAC address (this have to be a valid MAC address) 4) Enter the pertinent information for the SIP DEVICE settings – it should mostly be configured the same as a standard phone on your ... CUCM no DTMF on 3rd party SIP device. ... My setup a bunch of SIP phone numbers I own that forward to an external phone number. For example, I own 2222222222 on our ... I will show how to register Ekiga softphone to Callmanager 7.1.2, I haven't tried it on anything earlier but it should be pretty simillar. Will try to add other SIP devices at the end of the doc. Procedure Go to Device > Phone > Add new > Type: Third party SIP Phone Basic and fill in the required... Cisco CUCM. Content. About. ... 2N Helios IP with a camera requires a Third-party SIP Device (Advanced) phone ... In the CUCM, create an IP Phone Service in the menu ... Stating the above, as I had done => here <= in the past, using a Poly VVX Phone as a Cisco 3rd Party SIP device is completely unsupported. We only qualified our Conference Phone Range for Cisco. Most likely this may be a limitation on the Cisco end regarding the ability to use such functionality with non-Cisco devices.