TIE-DS1 (DS1 Tie Trunk)

TIE-DS1 (DS1 Tie Trunk)

Table 79. TIE-DS1 (DS1 TIE TRUNK)

MO Name (in Alarm Log)

Alarm Level

Initial Command to Run

Full Name of MO

TIE-DS1*

MAJOR**

test trunk grp/mbr l

DS1 Tie Trunk

TIE-DS1

MINOR

test trunk grp/mbr l

DS1 Tie Trunk

TIE-DS1

WARNING

test trunk grp/mbr

DS1 Tie Trunk

*See DS1-MM documentation if the tie trunk is on a MM710 Media Module Media Module.

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% of the trunks in this trunk group are alarmed.

Table 79. TIE-DS1 (DS1 TIE TRUNK)
MO Name (in Alarm Log)	Alarm Level	Initial Command to Run	Full Name of MO
TIE-DS1*	MAJOR**	test trunk grp/mbr l	DS1 Tie Trunk
TIE-DS1	MINOR	test trunk grp/mbr l	DS1 Tie Trunk
TIE-DS1	WARNING	test trunk grp/mbr	DS1 Tie Trunk
*See DS1-MM documentation if the tie trunk is on a MM710 Media Module Media Module.
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% of the trunks in this trunk group are alarmed.

Many trunk problems are caused by incorrect settings of parameters on the trunk group administration form. Settings must be compatible with the local environment and with parameter settings on the far-end. Refer to Administration Manual, for information on how to administer trunks. The Application Notes section of that book shows the correct settings for administrable timers and other parameters on a country-by-country basis.

The DS1 tie trunk provides both voice and data communications between two PBX switches. There are two types of DS1 interfaces:

24 DS0 channels on a 1.544 Mbps link
31 DS0 channels + 1 framing channel on a 2.048 Mbps link

DS1 Tie Trunks are used widely in the Distributed Communications System (DCS) and Central Attendant Service (CAS) system features.

A DS1 tie trunk can also be used as an access endpoint which is a non-signaling channel with bandwidth for voice-grade data, 56 Kbps data or 64 Kbps data.

DS1 tie trunk maintenance provides a strategy to maintain a DS1 tie trunk via a port on the MM710 Interface Media Modules.

The DS1 tie trunk maintenance strategy covers logging DS1 tie trunk hardware errors, running tests for trunk initialization, periodic and scheduled maintenance, system technician-demanded tests, and alarm escalation and resolution. Three different trunk service states are specified in DS1 tie trunk maintenance:


Out-of-service	The trunk is deactivated and cannot be used for incoming or outgoing calls.
In-service	The trunk is activated and can be used for both incoming and outgoing calls.
Disconnect (ready-for-service)	The trunk is in an activated state but can only be used for an incoming call.

If the DS1 Interface Media Module is out of service, then all trunks on the DS1 Interface Media Module are also placed into the out-of-service state and a Warning alarm is raised.