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Configuring ISDN ports settings (non-leased
line mode)
These settings affect the per-port ISDN configuration of the ISDN gateway. Use these settings to
configure ISDN ports to the requirements of your ISDN network. To access these settings, go to
Settings > ISDN ports.
Note that some ISDN configuration must be done on a blade-wide basis; see
ISDN
settings.
Refer to the table below for assistance with configuring the ISDN ports settings. After making changes
to any port, click Apply changes. If you select a different port before clicking Apply changes, then
any changes will be lost.
Port settings
Field
Field description
Enabled
Whether this port may be used to make
and receive ISDN calls.
Overlap
Specify the number of digits that a caller
receiving
will dial before the ISDN gateway will
number
apply the dial plan and make the IP part
length
of the call.
When the ISDN gateway has received
that number of dialed digits, it will
connect the call immediately.
If you do not want to use overlap
receiving, enter 0 to disable this feature.
Directory
The directory number of this ISDN port.
Number (DN)
Cisco TelePresence ISDN Gateways v2.0 Online help (Printable format)
Configuring ISDN ports settings (non-leased line mode)
Usage tips
Overlap receiving ensures that the ISDN
gateway waits for all dialed digits before
connecting the call. To use overlap
receiving, it must be supported by your
ISDN infrastructure.
When overlap receiving is enabled, the
ISDN gateway can collect a series of
dialed digits sent from an endpoint
before it starts the IP leg of the call.
Overlap receiving is configured on an
individual PRI port basis.
Note that this setting is not available
when the ISDN gateway is operating in
leased line mode.
Enter the phone number of this port, as
assigned by your ISDN network
provider. In many applications, all ISDN
ports will share a common directory
number; this is referred to as the ports
being part of a hunt group. Incoming
calls may arrive at any one of the ports
with a shared directory number.
Note that when receiving an incoming
ISDN call, the gateway advertises the
directory numbers of the ports selected
in the dial plan. If no directory number is
specified, it assumes the directory
number of the nearest lower-numbered
port. If no ports have a specified
directory number, the calling endpoint
will be instructed to use the same
number to place subsequent calls as it
used to make the first call.
Configuring general
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