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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
Serial (SMDI, MCI, or MD-110) Integration with Analog PIMG Units
The phone system sends call information and MWI requests through the data link, which is an RS-232
serial cable that connects the phone system and the master PIMG unit. Voice connections are sent
through the analog lines between the phone system and the PIMG units. The PIMG units communicate
with the Cisco
Unity server through the LAN or WAN by using Session Initialization Protocol (SIP).
Figure 6-4 shows the connections for a serial integration by using analog PIMG units.
Figure 6-4 Connections for a Serial (SMDI, MCI, or MD-110) Integration by Using Analog PIMG
Units
TIMG Integration
The phone system sends call information and MWI requests through the data link, which is an RS-232
serial cable that connects the phone system and the master TIMG unit. Voice connections are sent
through the T1 digital lines between the phone system and the TIMG units. The TIMG units
communicate with the Cisco
Unity server through the LAN or WAN by using Session Initialization
Protocol (SIP).
Figure 6-5 shows the connections.
Analog lines
RS-232 serial cable
Network connections
Cisco Unity
server
153567
LAN/WAN
Master PIMG unit
(SMDI data and calls)
Additional
slave
PIMG units
as needed
Slave PIMG unit
(calls only)
Phone
system