Asterisk - Monitor channelstats in realtime

Ok, this is a simple one. Your client calls and says that his calls are dropping and the call quality is bad. Using this single linux command you can monitor call quality in real time:

watch -n 1 'asterisk -rx "sip show channelstats"'

Yealink T21P Review

The Yealink T21P is an entry level IP Phone. It is in the same product class as the Snom 300, but comes in at about 20% cheaper.

The T21 comes in two models, the T21P being the POE version, which is the one I will be looking at. The only difference between the T21 and the T21P is in fact that the T21P supports 802.11af Power over Ethernet.