Denial Of Collect Calls - AudioCodes Mediant 800B User Manual

25.13 Denial of Collect Calls

You can configure the device to reject (disconnect) incoming Tel-to-IP collect calls and to
signal this denial to the PSTN. This capability is required, for example, in the Brazilian
telecommunication system to deny collect calls. When this feature is enabled upon
rejecting the incoming call, the device sends a sequence of signals to the PSTN. This
consists of an off-hook, an on-hook after one second, and then an off-hook after two
seconds. In other words, this is in effect, a double-answer sequence.
This feature can be enabled for all calls, using the EnableFXODoubleAnswer "global"
parameter, or it can be enabled for specific calls, by enabling this feature in a Tel Profile.
Notes:
25.14 Configuring ISDN Supplementary Services
The ISDN Supp Services Table page allows you to configure supplementary services for
Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) phones connected
to the device. This feature enables the device to route IP-to-Tel calls (including voice and
fax) to specific BRI ports (channels).
This table allows you to define BRI phone extension numbers per BRI port pertaining to a
specific BRI module. Therefore, this offers support for point-to-multipoint configuration of
several phone numbers per BRI channel. Up to eight phone numbers can be defined per
BRI trunk. For each BRI endpoint, the following optional configurations can also be defined:

User ID and password - for registering the BRI endpoint to a third-party softswitch for
authentication and/or billing. For viewing BRI registration status, see 'Viewing
Endpoint Registration Status' on page 587.
 Caller ID name - for displaying the BRI endpoint's caller ID to a dialed destination, if
enabled (i.e., "Presentation" is not restricted)

Caller ID presentation or restriction

Enable/disable sending caller ID to BRI endpoints
Notes:
User's Manual

This feature is applicable only to FXO interfaces.

If automatic dialing is also configured for an FXO port enabled with
Denial of Collect Calls, the FXO line does not answer the incoming call
(ringing) until a SIP 200 OK is received from the remote destination.
When a 200 OK is received, a double answer is sent from the FXO line.

Ensure that the PSTN side is configured to identify this double-answer
signal.

To use this table for routing of IP-to-Tel calls to specific BRI channels,
the Channel Select Mode in the Hunt Group Settings must be set to
'Select Trunk by ISDN Supplementary Services Table' (see 'Configuring
Hunt Group Settings' on page 295).

The ISDN Supp Services table can also be configure using the table ini
file parameter, ISDNSuppServ.

To allow the end-user to hear a dial tone when picking up the BRI phone,
it is recommended to set the Progress Indicator in the Setup Ack bit
(0x10000=65536). Therefore, the recommended value is 0x10000 + 0
x1000 = 65536 + 4096 = 69632 (i.e., set the ISDNInCallsBehavior
parameter to 69632).
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Mediant 800B GW & E-SBC
Document #: LTRT-10274