Specifications

Configure POTS Peers

Voice over IP for the Cisco AS5300 31

To enter the dial peer conﬁguration mode (and select POTS as the method of voice-related

encapsulation), use the following commands in the global conﬁguration mode:

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 the dial peer conﬁguration

mode:

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 explicit left-justiﬁed numbers

corresponding to the destination pattern matching the called number. If you have conﬁgured a preﬁx,

the preﬁx will be prepended 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 will receive

(depending on the attached equipment) a dial tone.

For example, suppose there is a voice call whose E.164 called number is 1(310) 555-2222. If you

conﬁgure a destination pattern of “1310555” and a preﬁx of “9,” the router will strip out “1310555”

from the E.164 telephone number, leaving the extension number of “2222.” It will then prepend the

preﬁx “9” to the front of the remaining numbers, so that the actual numbers dialed is “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.

For additional POTS dial-peer conﬁguration options, refer to the “Command Reference” section in

this document.

Direct Inward Dial for POTS Peers

Direct inward dial (DID) is used to determine how the called number is treated for incoming POTS

call legs. As shown in Figure 10, incoming means from the perspective of the router. In this case, it

is the call leg coming into the access server to be forwarded through to the appropriate destination

pattern.

Command Purpose

dial-peer voice number pots Enters the dial peer conﬁguration mode to

conﬁgure a POTS peer.

Step Command Purpose

1 destination-pattern string Deﬁnes the telephone number associated with this

POTS dial peer.

2 port controller number:D Associates this POTS dial peer with a speciﬁc

logical dial interface.