On MGCP Protocol

Understanding MGCP Packets: A brief overview and example with debugs

CCIE-V Understanding Basic MGCP Ingress Call Setup

http://www.ucguerrilla.com/2012/09/ccie-v-understanding-basic-mgcp-ingress.html

CCIE-V Understanding Basic MGCP Egress Call Setup

http://www.ucguerrilla.com/2012/09/ccie-v-understanding-basic-mgcp-egress.html

Troubleshooting Voice: MGCP – Part 1
http://blog.ine.com/2012/01/25/troubleshooting-voice-mgcp/

Troubleshooting Voice: MGCP – Part 2

http://blog.ine.com/2012/03/19/troubleshooting-mgcp-part-2/

MGCP TShoot- Call Setup and Teardown

http://blog.ipexpert.com/mgcp-tshoot-call-setup-and-teardown/