Cisco Systems OL-14619-01 DTMF Integration with Voice Cards, Serial Integration with Voice Cards

Chapter 6 Integrating Cisco Unity with the Phone System

How an Integration Works

Figure 6-5

Phone system

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

6-6 OL-14619-01