Call Forwarding To Pstn Gateway (Spa3102 And Spa8800) - Cisco SPA2102 Administration Manual

Configuring the PSTN (FXO) Gateway on the SPA3102
Call Scenarios
NOTE
Cisco Small Business ATA Administration Guide
HTTP Digest Authentication is one way to perform one-stage dialing of a VoIP-To-
PSTN call. The other way is with no authentication require. However, if the target
number is not specified in the Request-URI or the number matches the account
user-id of the PSTN Line, the call reverts to two-stage dialing.
Without Authentication (SPA3102 and SPA8800)
This scenario can also be implemented without authentication, using one-stage or
two-stage dialing, as in the HTTP Authentication case. The default VoIP caller dial
plan is used in this scenario. Authentication is performed when the method is none
or when the source IP address of the inbound INVITE matches one of the
patterns.

Call Forwarding to PSTN Gateway (SPA3102 and SPA8800)

This section describes a number of scenarios that forward calls to the PSTN
gateway. It includes the following topics:
•
“Forward-On-No-Answer to the PSTN Gateway” section on page 98
•
“Forward-All to the PSTN gateway” section on page 99
•
“Forward to a Particular PSTN Number” section on page 99
•
“Forward-On-Busy to PSTN Gateway or Number” section on page 99
On the SPA3102, you can configure Call Forward settings on the User page. On
SPA8800, the same parameters are set on the Phone page. For field descriptions,
see Call Forward Settings section.
Forward-On-No-Answer to the PSTN Gateway
In this scenario, Line 1 is configured to
The scenario is implemented by setting User 1 to forward to gw0 on no answer,
with
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
authenticated.
set to six seconds.
6
to the PSTN Gateway.
98