Erratic Key Telephone Operation; Key Telephone (Cannot Be Heard) - STARPLUS DHS-L Technical Manual

6-6
Chapter 6 - Maintenance/Troubleshooting
Symptom
Erratic operation:
LCD Display and
LEDs
Faint data noise
during background
conversation
Symptom
Other party cannot
hear you. (handset)
Table 6-3: Erratic Key Telephone Operation
Diagnostic Aid
Digital Volt/OHM Cable distance is too
meter long for gauge of
cable used.
Non-standard
telephone cable
being used or
multiple digital
stations fed from
one common cable.
Table 6-4: Key Telephone (cannot be heard)
Diagnostic Aid
Key Telephone Component failure
(other station)
Cause
If a key telephone is not receiving clear
2B+D signal from KSU, test as follows:
Test cable with a known good keyset.
Check wiring, cables, and connectors.
Replace card.
Check AC voltage.
Cause
1. Verify MUTE Btn LED is not lit.
2. Lift handset, dial another station. Talk.
3. Replace handset assembly and repeat
Step 1.
4. Replace handset cord and repeat
Step 1.
5. If still no transmit, the key telephone
will need to be replaced.
System D iagnosti cs
Corrective Action
Corrective Action