Chapter 6 Integrating Cisco Unity with the Phone System
How an Integration Works
Connections for an Integration by Using TIMG Units
Additional
slave TIMG units
as needed
Slave TIMG unit
(calls only)
| | LAN/WAN | |
| Master TIMG unit | Cisco Unity |
| (SMDI data and calls) |
| server |
| | |
| | T1 digital lines (one or more) | 190676 |
| | RS-232 serial cable |
| | |
| | Network connections | |
| | |
DTMF Integration with Voice Cards
The circuit-switched phone systems use analog lines to carry voice connections, call information, and MWI activation requests. The lines connect the ports on the phone system to the voice messaging ports on voice cards installed on the Cisco Unity server. Signaling carried across the analog lines is achieved through DTMF digits being sent to and from the phone system and Cisco Unity. For example, in order for Cisco Unity to turn on or off the MWI lamp, DTMF digits (including #, *, and the digits 0–9) are sent from Cisco Unity to the phone system. Figure 6-6shows the connections used in a DTMF integration.
Figure 6-6 Connections for a DTMF Integration by Using Voice Cards
| | | | 55417 |
| | | |
| | | |
| | | |
Phone system | Cisco Unity server |
| | | Analog lines |
| | |
Serial Integration with Voice Cards
In serial integrations (also called SMDI or MCI integrations for NEC phone systems), circuit-switched phone systems use an RS-232 serial cable to carry call information and MWI activation requests. The serial cable connects the serial port on the phone system to the serial port on the Cisco Unity server.
(Some phone systems require hardware such as a modem or PBXLink box to connect to the serial cable.) Figure 6-7shows the connections.
Design Guide for Cisco Unity Release 5.x
