DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-1090TIE-DS1 (DS1 Tie Trunk)
3
TIE-DS1 (DS1 Tie Trunk)
The DS1 tie trunk provides both voice and data inter-PBX communication. A 24
channel DS1 Interface circuit pack can supp ort up to 24 digital tie tr unks through
a 1.544 Mbps DS1 link. A 32 channel DS1 Interfac e circuit pack c an support up
to 30 digital tie trunks through a 2.04 8 Mbps DS1 link. DS1 Interface circuit p acks
are described in DS1-BD. DS1 Tie Trunks are used widely in the DCS and Central
Attendant Service (CAS) features of the system.
A DS1 tie trunk can also be used as an ac cess endpoint whic h is a non-signaling
channel with a bandwid th of voice-grade-d ata, 56K-data or 64K-data.
DS1 tie trunk maintenance provides a strateg y to maintain a DS1 tie trunk via a
port on the DS1 Interface circuit p ack. The maintenance strategy covers logging
DS1 tie trunk hardware errors, running tests for trunk initialization, p eriodic and
scheduled maintenanc e, system technician-d emanded tests, and alarm
escalation and resolution. Three different trunk servic e states are specified in the
DS1 tie trunk maintenance. They are:
out-of-service
in which the trunk is in a
deactivated state and cannot be used for ei ther incoming or outgoing calls;
in-service
in which the trunk is in an activated state and can be used for both
incoming and outg oing calls;

disconnect

(ready-for-service) in which the trunk is
in an activated state but c an only be used for an inc oming call. If the DS1
Interface circuit p ack is out-of-service, all trunks on the DS1 Interface circuit pac k
are placed into out-of-servic e state, and a Warning alarm is raised .
MO Name (in
Alarm Log)
Alarm
Level InitialCommand to Run Full Name of MO
TIE-DS11
1. For additional repair information, see also DS1-BD (DS1 Interface Circuit Pack)
Maintenance docum entation.
MAJOR2
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 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