SIP User's Manual 316 Document #: LTRT-83310
Mediant 600 & Mediant 1000
18.5.2.12 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 is enabled for all calls, using the EnableFXODoubleAnswer parameter.
Notes:
• This feature is applicable only to FXO interfaces.
• To support this feature, ensure that automatic dialing has not been
configured for the FXO ports.
• Ensure that the PSTN side is configured to identify this double-answer
signal.
18.5.3 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. In addition, for each BRI endpoint, the following optional configurations can 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
Registration Status' on page 521.
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:
• To use this table for routing of IP-to-Tel calls to specific BRI channels,
the Channel Select Mode in the Trunk Group Settings must be set to
'Select Trunk by ISDN Supplementary Services Table' (see 'Configuring
Trunk Group Settings' on page 253).
• You can also configure this table using the ISDNSuppServ ini file table
parameter (see 'Configuration Parameters Reference' on page 541).
• 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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