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Chapter 4
Configuring the PA-VXA, PA-VXB, and PA-VXC
Configure POTS Peers
Table 4-3
Dial Peer
Tag
Router A
1
10
Router B
11
4
POTS peers enable incoming calls to be received by a particular telephony device. To configure a POTS
peer, you need to uniquely identify the peer (by assigning it a unique tag number), define its telephone
numbers, and associate it with a voice port through which calls will be established. Under most
circumstances, the default values for the remaining dial-peer configuration commands will be sufficient
to establish connections.
To enter the dial-peer configuration mode (and select POTS as the method of voice-related
encapsulation), use the following command in global configuration mode:
dial-peer voice number pots
The number value of the dial-peer voice pots command is a tag that uniquely identifies the dial peer.
(This number has local significance only.)
To configure the identified POTS peer, use the following commands in dial-peer configuration mode:
Command
Step 1
destination-pattern string
Step 2
port controller number
Outbound Dialing on POTS Peers
When a router receives a voice call, it selects an outbound dial peer by comparing the called number (the
full E.164 telephone number) in the call information with the number configured as the destination
pattern for the POTS peer. The router then strips out the left-justified numbers corresponding to the
destination pattern matching the called number. If you have configured a prefix, the prefix will be put in
front of the remaining numbers, creating a dial string, which the router will then dial. If all numbers in
the destination pattern are stripped out, the user receives (depending on the attached equipment) a dial
tone.
For example, suppose there is a voice call for which the E.164 called number is 1 (310) 767-2222. If you
configure a destination pattern of "1310767" and a prefix of "9," the router strips out "1310767" from
the E.164 telephone number, leaving the extension number of "2222." It then appends the prefix "9" to
the front of the remaining numbers, so that the actual numbers dialed are "9, 2222." The comma in this
example means that the router will pause for one second between dialing the "9" and the "2" to allow
for a secondary dial tone.
OL-3592-02
Peer Configuration Table for Sample VoIP Network
Ext
Dest-Pattern
6....
+1408555....
+1729411....
+1408555....
2....
+1729411....
Purpose
Define the destination telephone number associated with this
POTS dial peer.
Associate this POTS dial peer with a specific logical dial interface.
Type
Session-Target
POTS
VoIP
IPV4 10.1.1.2
VoIP
IPV4 10.1.1.1
POTS
T1/E1 Digital Voice Port Adapter Installation and Configuration
Configuring Voice over IP
Codec
QoS
G.729
Best Effort
G.729
Best Effort
4-19
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Troubleshooting
