– 604 –
CHAPTER 5 Operation Procedure for System with PIR
3.2 TRUNK FAULT
This paragraph explains the fault repair procedure when a fault, shown in Table 5-3, has occurred to a spe-
cific trunk.
3.2.1 Check Point
When repairing a trunk fault, consider the following items:
(1) Check alarm lamps on trunk circuit cards.
(2) When an outgoing call cannot be originated to a specific trunk or when an incoming call cannot be
terminated from a specific trunk, check Tenant Restriction Data (assigned via ATNR command) and Route
Restriction Data (assigned via ARSC command).
(3) Three-Way Conference Trunk (CFT) is on the MUX (PH-PC36) circuit cards. If a three-way conference
call cannot be established, check the MUX cards.
(4) If the present timing for supervising the trunk/sender status is considered responsible for the fault, change
the timing. The specifications for timings that can be changed with respect to trunks and senders are shown
in Table 5-4 and Table 5-5.
Table 5-3 Trunk Fault Situation
TRUNK FAULTY SITUATION REFERENCE SECTION
ORT No connection can be set up.
PB/DP signals are erroneously received or cannot be received.
Section 3.2.3, Trunk (ORT, SND,
CFT) Fault
SND No connections can be set up.
PB/DP signals are erroneously sent out or cannot be sent out.
CFT No connections can be set up.
No three-way calling can be made.
Noise gets in an established connection.
COT
TLT
DTI
No connections can be set up.
A connection results in no speech.
Noise gets in an established connection.
Section 3.2.4, Trunk (COT, TLT,
DTI) Fault
MG
No connections can be set up.
A connection results in no speech.
Noise gets in an established connection.
Refer to the Installation and startup
procedure of MG (Media Gateway)
in Peripheral Equipment Manual.
To Next Page
Loading...
