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Configuring an ISDN Interface to Screen Incoming Calls
By default, an ISDN interface is configured to accept all incoming calls. If multiple
devices are connected to the same ISDN line, you can configure an ISDN interface
to screen incoming calls based on the incoming called number.
You can specify the incoming called numbers that an ISDN interface accepts. You
can use the
reject
connected to an ISDN line, and you want the incoming called number rejected on a
second ISDN device connected to the same ISDN line. For example, if the first ISDN
device has the called number 4085321901, you can configure the called number
4085321901 with the
When an incoming ISDN call is received, the Services Router matches the incoming
called number against the called numbers configured on its ISDN interfaces. If an
exact match is not found, or if the called number is configured with the
the incoming call is ignored. Each ISDN interface accepts only the calls whose called
number are configured on it.
To specify that an incoming called number be rejected by the interface, include the
incoming-called-number
br-pim/0/port isdn-options]
You can configure up to 30 incoming called numbers.
Configuring ISDN Logical Interface Properties
You configure ISDN services interface properties at the logical unit level.
The dialer interface,
backup ISDN connection. The interface can be configured in two modes:
—Northern Telecom DMS-100
ntdms100
ntt
—NTT Group switch for Japan
—When the Terminal Endpoint Identifier (TEI) negotiates with the ISDN
tei-option
provider. Specify first-call (activation does not occur until the call setup is sent)
or power-up (activation occurs when the Services Router is powered on). The
default value is power-up.
—Q.931-specific timer for T310, in seconds. Specify the number of seconds
t310
from 1 through 65536. The default value is 10 seconds.
reject
option to specify a number that the ISDN interface can ignore. The
option is useful when an incoming called number is specified on one device
reject
statement with the
hierarchy level:
[edit interfaces br-pim/0/port isdn-options]
incoming-called-number number reject;
, is a logical interface for configuring dialing properties for a
dln
Multilink mode using
multilink-ppp
router supports B-channel bundling (two B-channels connected to provide a
128-Kbps connection) and runs Multilink Point-to-Point Protocol (MLPPP). When
the dialer interface (
dln
) is in multilink mode, the value of
149. However, you can only configure one dialer interface with
Chapter 60: Configuring ISDN Interfaces
option on the second ISDN device.
reject
option at the
encapsulation. This mode is used when the
Configuring an ISDN Interface to Screen Incoming Calls
option,
reject
[edit interfaces
is from 0 through
n
multilink-ppp
875
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