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Advanced Options for Voice Services
Configuring Dial Plans
Cisco SPA232D Administration Guide 225
C
The caller calls Line 1 and if Line 1 is not picked up after six seconds, the PSTN
Line picks up the call and the call reverts to a PSTN-Gateway call, as described
above. In this case, HTTP authentication is not allowed because Line 1 does not
authenticate inbound INVITE requests. If you need to authenticate the VoIP caller in
this case, you must select the PIN authentication method, or else the caller is
not
authenticated.
NOTE If the PSTN Line is busy at the moment of the forward, it does not answer the VoIP
call. The call forward rule is ignored and Line 1 continues to ring.
Forward-All to the PSTN gateway
In this scenario, Line 1 is configured with
Cfwd All Dest
parameter to the PSTN
gateway.This scenario is the same the previous case, except the FXO picks up the
Line 1 call immediately.
If the PSTN Line is busy at the moment of the call, the PSTN Line does not pick up
the call, the call forward rule is ignored, and Line 1 continues to ring.
Forward to a Particular PSTN Number
In this scenario, the forward destination is set to <
target-number>@gw0
>. This is
the same as in the previous examples, except that the ATA device automatically
dials the given target number on the PSTN line right after it answers the VoIP call
leg. This is a special case of one-stage dialing where the target number is
specified in the configuration. The caller is not authenticated in this case
regardless of the authentication method. However, the caller is still limited by the
VoIP Caller ID Pattern
parameter
Forward-On-Busy to PSTN Gateway or Number
This scenario is similar to the previous cases of call forwarding to gw0, but this
applies when Line 1 is active.
Configuring Dial Plans
Dial plans determine how dialed digits are interpreted and transmitted. They also
determine whether the dialed number is accepted or rejected. You can use a dial
plan to facilitate dialing or to block certain types of calls such as long distance or
international. This section includes information that you need to understand dial
plans, as well as procedures for configuring your own dial plans.