Speech Path System Fault - Fault Related To Speech - NEC Univerge SV8500 Operation And Maintenance Manual

4.5.2

Speech Path System Fault - Fault Related to Speech

Faulty Situation:
• Fault related to speech such as noise, one-way speech, no-speed, etc. occurs.
• Even if dialing is made, Dial Tone (DT) does not stop.
• [1-C] Both TSW Write Failure
• [1-D] TSW Write Failure
<<For Dual Configuration>>
(1) Check to see if fault occurs by replacing TSW circuit cards one by one.
(a) Replace the TSW circuit card by referring to
Circuit Card.
(b) Place the TSW circuit card in ACT mode. Refer to
(c) Check to see if a station-to-station connection can be set up and identify a TSW circuit card responsi-
ble for the fault.
(d) Perform the above check by extracting the TSW circuit cards individually.
(2) Check to see if fault occurs by replacing MUX circuit cards one by one.
(a) Replace the MUX circuit card by referring to
Card.
(b) Place the MUX circuit card to ACT mode. Refer to
(c) Check to see if a station-to-station connection can be set up and identify a circuit card responsible for
the fault.
(d) Perform the above check by extracting the MUX circuit cards individually
CHAPTER 5 Operation Procedure for System with PIR
Replacement Procedure of TSW (Time Division Switch)
Changeover of CPU/TSW/PLO
Replacement Procedure of MUX (Multiplexer) Circuit
How to Control Switching
– 631 –
in Chapter 2.
Block.