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Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 6 Integrating Cisco Unity with the Phone System
How an Integration Works
DTMF Integration with Analog PIMG Units
The phone system sends call information, MWI requests, and voice connections through the analog lines,
which connect the phone system to the PIMG units. The PIMG units communicate with the Cisco
Unity
server through the LAN or WAN by using Session Initiation Protocol (SIP).
Figure 6-3 shows the
connections for a DTMF integration by using analog PIMG units.
Figure 6-3 Connections for a DTMF Integration by Using Analog PIMG Units
Analog lines
Network connections
Phone system
Cisco Unity server
119418
LAN/WAN
PIMG unit
Additional
PIMG units
as needed
PIMG unit