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18 Avaya Application Solutions IP Telephony Deployment Guide
Figure 2: Communication Manager traffic flow
Figure notes:
1. SIP phones exchange RTP audio among themselves and with the G700, G650 Media
Gateways, and so forth, but not with IP phones.
2. SIP signaling from Avaya Communication Manager is always to/from SES.
3. SIP signaling can go through a C-LAN (on a G650, etc.), or directly Communication Manager
(if the server is the S8300 or S8500).
Note:
Note: This is actually true for both H.323 and H.248 signaling. The diagram gives the
impression that H.248 comes directly from Communication Manager and H.323
goes through the media gateways, when in fact both protocols can go both ways
depending on server type.
Communication Manager is the next generation of Avaya call processing software.
Communication Manager is an open, scalable, highly reliable, and secure telephony
application. Communication Manager operates on Avaya servers, and on the existing family of
DEFINITY servers.
Communication Manager carries forward all the current DEFINITY capabilities, plus all the
enhancements that enable enterprises to take advantage of new, distributed technologies,
increased scalability, and redundancy. Communication Manager is evolved from DEFINITY
software and delivers no-compromise, enterprise IP Telephony.
cynds222 LAO 012506
Communications
Applications
Communications
Manager
Avaya Media Servers
Circuit-switched
Telephone
IP
Communications
Device
CCMS Signaling over IP
H.248 Signaling
H.323 Signaling
Avaya Media
Gateways
G650
MCC1
SCC1
RTP Audio
RTP Audio
PSTN
Avaya G700
Circuit-switched
Telephone
SIP
Phone
RTP Audio
SES
SIP Signaling
SIP Signaling
SIP Signaling
RTP Audio