Many organizations use the Cisco Call Manager as their primary communication platform. Cisco Call Manager is one of the most well-known platforms with many features and capabilities. Developers looking...

The Real-Time Transfer Protocol with the acronym RTP was standardized in 1996. It allows the transmission of audio and video data in real time. RTP has end-to-end transport capabilities...

Before the upgrade to CUCM 12.0, check the following phone models, If you use any of these deprecated phone models on an older release of Unified Communications Manager and...

Did you get this SIP error on your Cisco call manager? You already change all the codec, configured transcoder which is register with call manager and everything seems fine....

If you’d like to know more about CUCM, we’re going to make it easy for you. We’ve put together a collection of 101 Free Video Training for Cisco Unified...