Two-Stage Dialing - Linksys SPA1001 Administrator User Manual

Chapter 4 Configuring the PSTN Gateway (FXO)
Table 1-27 VoIP User Account Information
Parameter
User ID
1/2/3/4/5/6/7/
8
Password
1/2/3/4/5/6/7/
8
User
1/2/3/4/5/6/7/
8 DP
If Authentication is disabled, a default dial plan is used for all unknown VoIP users.
Note

Two-Stage Dialing

In two-stage dialing, the SPA3102 takes the FXO port off-hook but does not automatically dial any digits
after accepting the call. To invoke two-stage dialing, the VoIP caller should INVITE the PSTN Line
without the user-id in the Request-URI or with a user-id that matches exactly the <User ID n> of the
PSTN Line. A different user-id in the Request-URI is treated as a request for one-stage dialing if
one-stage dialing is enabled, or dropped by the SPA3102 (as if no user-id is given) if one-stage dialing
is disabled.
If Authentication is disabled, a default dial plan is assigned to all VoIP callers.
Note
HTTP Digest Authentication can be also used for two-stage dialing, as in one-stage dialing. If using
HTTP Digest Authentication or Authentication is disabled, the VoIP caller should hear the PSTN dial
tone right after the call is answered (by a SIP 200 response).
If PIN Authentication is enabled, the VoIP caller is prompted to enter a PIN number after the SPA3102
answers the call. The PIN number must end with a # key. The inter-PIN-digit timeout is 10 seconds (not
configurable). Up to eight VoIP caller PIN numbers can be configured on the SPA3102. A dial plan can
be selected for each PIN number. If the caller enters a wrong PIN or the SPA3102 times out waiting for
more PIN digits, the SPA3102 tears down the call immediately with a BYE request.
When the source address of the INVITE is 127.0.0.1, authentication is automatically disabled because
Note
this is a call by the local user. This applies to both one-stage and two-stage dialing.
Table 1-28
Document Version 3.1
Group Description
PSTN The username value.
Line
PSTN The password value.
Line
PSTN Specifies the dial plan to be used for this VoIP
Line user. If 0, dial plan processing is disabled; the
given target number is dialed to the PSTN as is.
lists the parameters used in two-stage dialing.
How VoIP-To-PSTN Calls Work
Values
31-character string
31-character string
Choice of 0-8
Linksys ATA Administrator Guide
4-3