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Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 6 Integrating Cisco Unity with the Phone System
Centralized Voice Messaging
• The unique subscriber extensions on the non-integrated phone system to forward on no answer to
the corresponding phantom extensions on Cisco Unified
CM.
• The Switch.ini file (phone system configuration file) to enable Cisco Unity access through the serial
cable for turning alternate MWIs on and off.
• An RS-232 serial cable between a Cisco Unity serial port and the non-integrated phone system serial
port to send alternate MWI activation requests.
• The Cisco Unity serial configuration file, if the non-integrated phone system uses a serial
configuration different from the default serial configuration used by Cisco
Unity.
Figure 6-17 shows the connections via a serial cable between a Cisco Unified CM integration and a
non-integrated phone system.
Figure 6-17 Connection for Sending Alternate MWIs via a Serial Cable to a Non-Integrated Phone
System from a Cisco Unified Communications Manager Integration
Centralized Voice Messaging
Cisco Unity supports centralized voice messaging by supporting various inter-phone system networking
protocols including, for example, proprietary protocols such as Avaya DCS, Nortel MCDN, or Siemens
CorNet, and standards-based protocols such as QSIG or DPNSS.
When discussing phone systems involved in centralized voice messaging, there are essentially two types:
Centralized voice messaging provides voice messaging services to all subscribers in a networked phone
system environment. Cisco
Unity can be hosted on a message centre PINX and provide voice messaging
services to all subscribers in an enterprise assuming the message centre PINX and all subscriber PINX
phone systems are properly networked.
Cisco
Unity server
Gateway
Cisco Unified
Communications
Manager
V
PSTN
191725
Trunk connection between phone systems
Serial cable
Non-integrated
phone system
LAN/WAN
Message Centre PINX
The phone system hosts the voice messaging system (the phone system is
directly connected to the voice messaging system).
Subscriber PINX
The phone system is remote from the voice messaging system (the phone system
is not directly connected to the voice messaging system).