DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-483DID-TRK (Direct Inward Dial Trunk)
9
DID-TRK (Direct Inward Dial Trunk)
NOTE:
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
DEFINITY.
Enterprise Communications Server Release 5.4 Administration and Feature
Description
, 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.
Direct Inward Dial trunks connect the switch to the CO, and allow outside parties
to call directly to an extension in the system. DID trunk circuit packs support
eight incoming-only ports. Each port provides an interface between the 2-wire
analog CO line and the 4-wire TDM bus on the switch.
DID Trunk Operation
The DID port receives three to five digits from the CO that are used to directly
connect an outside caller to the called station without assistance from an
attendant. For each call, the CO switch signals the system by opening and
closing individual DID loops (one of the eight ports), causing the starting or
stopping of loop current.
DID Trunk Testing
The system uses four tests of on-board circuitry to diagnose the health of the
trunk. These are described in the following sections. Additionally, in-line testing
which can generate errors, is performed while a call is in progress. See the Error
Log table for a description of these errors. These errors may be reproduced by
placing a call on the trunk and checking the Hardware Error Log.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run
1
1. UU is the universal cabinet number (1 for PPN, 2 -44 for EPNs). C is the carrier designation
(A, B, C, D, or E). SS is the number of the slot in which the circuit pack resides (01 to 21). pp
is the two digit port number (01, 02, ...).
Full Name of MO
DID-TRK 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
UUCSSpp
l DID Trunk
DID-TRK MINOR test port
UUCSSpp
l DID Trunk
DID-TRK WARNING None DID Trunk
