Chapter 1
Using the Cisco Voice Gateway 200
Using the Cisco VG200 with Cisco CallManager
1-6
Software Configuration Guide for the Cisco VG200
78-10322-02
Using the Cisco VG200 with Cisco CallManager
When used with Cisco CallManager 3.0 or later as a call agent, the Cisco VG200
functions as an MGCP gateway. The Cisco VG200 supports MGCP only on its
Foreign Exchange Station (FXS) and Foreign Exchange Office (FXO) analog
ports, while it supports H.323 on its T1 digital ports.
As shown in Figure 1-4, a Cisco VG200 gateway allows you to connect standard
POTS telephones (connected directly to the gateway or anywhere on the PSTN)
with Cisco IP SoftPhones, Cisco IP Phones, or any H.323-compliant telephony
devices. The Cisco VG200 provides a 10/100BaseT Ethernet port for connection
to the data network and a number of different telephony interfaces, depending on
the hardware and software configuration you choose.
Figure 1-4
Using the Cisco VG200 with Cisco CallManager
Currently, the Cisco VG200 supports the following types of analog ports and
connections:
•
1 to 4 FXO ports for connecting to a central office or PBX
•
1 to 4 FXS ports for connecting to POTS telephony devices
•
1 or 2 BRI ports for connecting to ISDN
•
1 or 2 E1/T1 digital ports:
–
For connecting to the PSTN using FXO emulation
–
For connecting to a T1 channel bank using FXS emulation
POTS
phones
Cisco
CallManager
Backup Cisco
CallManager
Cisco
Softphone
Cisco
IP phone
PSTN
Voice Gateway
10/100BaseT Ethernet
33344
FXO ports
FXS ports
