Call Processing
Issue 3.4.1 June 2005
93
All IP endpoints (IP Softphones, IP agents, and IP Telephones) H.323 voice applications should
register with an Avaya gatekeeper before any calls are attempted. Communication Manager
enforces call signaling (Q.931) and call control (H.245) channels from endpoints to terminate on
the gatekeeper. This allows Communication Manager to provide many of its calling features to
H.323 calls.
Registration and alternate gatekeeper list
The RAS protocol is used by the IP endpoint to discover and register with the Communication
Manager gatekeeper. The discovery mechanism uses unicast IP facilities.
When registration with the original gatekeeper (C-LAN or S8300) IP address is successful, the
switch sends back the IP addresses of all the C-LANs (or LSPs) in the IP Telephone’s network
region. These addresses are used if the call signaling to the original C-LAN circuit pack fails.
Figure 37: Discovery and registration process to the gatekeeper
shows the registration
process.
Figure 37: Discovery and registration process to the gatekeeper
Summary of Contents for Application Solutions
Page 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Page 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Page 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Page 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Page 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Page 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...