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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-733ISDN-TRK (DS1 ISDN Trunk)
3
ISDN-TRK (DS1 ISDN Trunk)
A DS1 ISDN Trunk is known as a B-channel. It is a 64 kbps Bearer channel that
can be used to transmit digital traffic, be it voice or data. These trunks use a
separate channel for signaling (for example, for call setup); this mode of
operation is known as out-of-band signaling, as opposed to in-band, robbed-bit
signaling, where the signaling traffic flows over the same channel as the voice or
data traffic. The separate signaling channel is called a D-channel in ISDN
terminology, and it carries all the call control signaling messages for the DS1
ISDN Trunk B-channels. The D-channel for these B-channels is an ISDN-PRI
(Primary Rate Interface) Signaling Link Port (ISDN-LNK/ISDN-PLK).
On 24-channel interfaces, any of the first 23 ports on the DS1/UDS1 interface
circuit pack can be a B-channel. The 24th port may be used as a B-channel or as
a D-channel depending on the type of ISDN-PRI Signaling Group (ISDN-SGR) to
which it belongs.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run Full Name of MO
ISDN-TRK
1
1. For additional repair information, refer to the "DS1-BD (DS1 Interface Circuit Pack)"
maintenance object.
MAJOR
2
2. A MAJOR alarm on a trunk indicates that alarms on these trunks are not downgraded by the
set options command and that at least 75 percent of the trunks in this trunk group are
alarmed.
test port PCSSpp l DS1 ISDN Trunk
ISDN-TRK MINOR test port PCSSpp l DS1 ISDN Trunk
ISDN-TRK WARNING test port PCSSpp sh DS1 ISDN Trunk