Specifications
Linking PBX Users to a T1 ISDN PRI Interface Example
Voice over IP for the Cisco AS5300 45
Configuration Examples
This section provides sample configurations for the following scenarios:
• Linking PBX Users to a T1 ISDN PRI Interface Example
• Configuring Voice over IP for E1 R2 Signalling Example
• Configuring Voice over IP for T1-CAS Example
These configuration examples should give you a starting point in your configuration process. The
actual Voice over IP configuration procedure you complete depends on the topology of your voice
network. These configuration examples need to be customized to reflect your network topology.
Linking PBX Users to a T1 ISDN PRI Interface Example
This example describes how to configure Voice over IP to link PBX users with T1 channels
configured for ISDN PRI signalling. In this example, the company has already established a working
IP connection between its two remote offices, one in San Jose, California and the other in Research
Triangle Park (RTP), North Carolina. Figure 11 illustrates the topology of this example.
Figure 11 Linking PBX Users to a T1 ISDN PRI Interface Example
Each office has an internal telephone network using PBX, connected to the voice network by T1
interfaces. The San Jose office, located to the left of the IP cloud, has two T1 connections; the RTP
office, located to the right of the IP cloud, has only one. Both offices are using PRI signalling for the
T1 connections.
To reach a destination in RTP, users in San Jose pick up the handset, hear a primary dial tone, then
dial 9, 411, and the destination extension number. To reach a destination in San Jose, users in RTP
pick up the handset, hear a primary dial tone, then dial 4. After dialing 4, users hear a secondary dial
tone. The users then dial 555, and the extension number.
408 555-2001
408 555-1001
408 555-3001
729 411-5001 729 411-5004
729 411-5002 729 411-5003
Cisco AS5300
Access
Server 1
WAN
WAN
T1 ISDN PRI
T1
ISDN PRI
10.1.1.1
10.1.1.2
IP
cloud
Cisco AS5300
Access Server 2
Voice port 0:D
Voice port
0:D
10351
1:D