Examples of the simplest CUCME configuration for beginners

Good morning!

For those who are taking their first steps in the world of VoIP and learning how to configure Call Manager Express (CUCME), I think the following link will be helpful. The document provides examples of the simplest configuration of SCCP and SIP phones for registration on CME:

http://www.i-1.nl/blog/wp-content/uploads/CUCME-cheatsheet-1.0.pdf

As you can see, everything is very simple :)

About troubleshooting poor voice quality issue when calling from Cisco Jabber clients

Good morning!

A couple of weeks ago, I was troubleshooting a problem with poor voice quality when calling from Cisco Jabber software clients. The customer's VoIP network covered several offices in different cities, CUCM 8.6 and СUP 8.6 were used. In general, there were about 1,500 users in their enterprise telephone network, and more than a thousand of them did not have Cisco hardware phones and called each other using Cisco Jabber.

The problem was that when calling from Cisco Jabber, users complained about poor voice quality, namely, interruption of speech, gaps, etc, while words and phrases were sometimes completely unintelligible. Moreover, the problem was present even when making calls within the LAN! Usually, this phenomenon is associated with network problems - a large percentage of voice packet losses. And the reason for the loss of voice packets could be a high jitter value, incorrectly configured queues on routers, insufficient bandwidth, enabled VAD, and the wrong choice of codec.