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6-3
Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 6 Integrating Cisco Unity with the Phone System
How an Integration Works
Lines and Cables to Make Physical Connections
Depending on the type of integration, different combinations of lines and cables are used to connect the
phone system and Cisco
Unity.
Integration with Cisco Unified Communications Manager
Cisco Unified Communications Manager (CM) (formerly known as Cisco Unified CallManager) and SIP
proxy servers use network connections that carry all communication to and from Cisco
Unity. Figure 6-1
shows the network connections used in an integration with Cisco Unified CM.
Figure 6-1 Connections for an Integration with Cisco Unified Communications Manager
Digital Integration with Digital PIMG Units
The phone system sends call information, MWI requests, and voice connections through the digital 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 6-2 shows the
connections used in a digital integration by using digital PIMG units.
Figure 6-2 Connections for a Digital Integration by Using Digital PIMG Units
Cisco
Unity server
Gateway
V
Cisco Unified
CallManager
LANPSTN
55421
Digital lines
Network connections
Phone system
Cisco Unity server
104043
LAN/WAN
PIMG unit
Additional
PIMG units
as needed
PIMG unit