Cisco Small Business Pro SPA3102 Administration Manual page 98

Configuring the PSTN (FXO) Gateway on the SPA3102
How VoIP-To-PSTN Calls Work
NOTE
ATA Administration Guide
If the FXO port is currently in use (off-hook) or the PSTN line is being used by
another extension, the ATA device replies to the INVITE with a 503 response.
Otherwise, it compares the <
PSTN Line. If they are the same, the ATA device interprets this as a request for
two-stage dialing (see the
different, the ATA device processes the <
Dial Plan
corresponding <
If dial plan processing fails, the ATA device replies with a 403 response.
Otherwise, it replies with a 200 and at the same time takes the FXO port off hook
and dials the target number returned after processing the dial plan.
User ID parameter
If the
be disabled for the PSTN Line.
If HTTP Digest Authentication is enabled, the ATA device challenges the INVITE
with a 401 response if it does not have a valid Authorization header. The
Authorization header should include a <
one of eight VoIP user accounts that can be configured on the ATA device. The
credentials are computed based on the corresponding password using Message
Digest 5 (MD5). The <
stored on the ATA device. Each VoIP user account contains the information listed
below.
Table 1 Authentication Parameters
Parameter Web
Page
User ID 1/2/ PSTN
3/4/5/6/7/8 Line
Password 1/ PSTN
2/3/4/5/6/7/ Line
8
User 1/2/3/ PSTN
4/5/6/7/8 Line
DP
Dialed-Number
"Two-Stage Dialing" section on page
Dialed-Number
>.
on the PSTN Line is blank, the
User ID
User ID
n> parameter must match one of the VoIP accounts
Description
The username value.
The password value.
Specifies the dial plan to be used for
this VoIP user. If 0, dial plan
processing is disabled; the given
target number is dialed to the PSTN
as is.
User ID
> with the parameter of the
97). If they are
> using the
Register
parameter should
n> parameter, where n refers to
Values
31-character string
31-character string
Choice of 0-8
6
96