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Advanced Options for Voice Services
VoIP-to-PSTN and PSTN-to-VoIP Calling
Cisco SPA232D Administration Guide 219
C
You can specify Gateways 1 to 4 in a dial plan by using the identifiers gw1, gw2,
gw3, or gw4. Also, gw0 represents the internal PSTN gateway via the LINE port.
You can specify in the dial plan to use gw
x
(
x
= 0,1,2,3,4) when making certain calls.
In general, you can specify any gateway address in the dial plan. In addition, three
parameters are added that can be used with call routing:
• usr: User-id used for authentication with the given gateway
• pwd: Password used for authentication with the given gateway
• nat: Enable or disable NAT mapping when calling the gateway
The following table lists some examples.
You can set up multiple PSTN gateways at different locations and configure Line 1
to use a different gateway when dialing specific numbers.
Example Description
<9,:>xx.<:@gw1
Dial 9 to start outside dial tone, followed by one
or more digits, and route the call to Gateway 1.
[93]11<:@gw0>
Route 911 and 311 calls to the local PSTN
gateway
<8,:1408>xxxxxxx<:@pstn.
cisco.com:5061;usr=joe;
pwd=joe_pwd;nat>
Dial 8 to start outside dial tone, prepend 1408
followed by seven digits, and route the call to
pstn.cisco.com:5061, with user-id = joe, and
pwd = bell_pwd, and enable NAT mapping
<8,:1408>xxxxxxx<:@gw2:5061;
usr=”Alex Bell”;pwd=
”anything”;nat=no>
Dial 8 to start outside dial tone, prepend 1408
followed by seven digits, and route the call to
Gateway 2, but use the given port, user-id, and
password, and no pstn.cisco.com:5061, and
with user-id = “Alex Bell” and pwd = bell_pwd,
and disable NAT mapping