Vodavi Starplus Dhs/dhs-e Technical Manual

6-42System Applications
Numbering Plan (DHS-E Only)
The Installer can customize the Numbering Plan. The default Ranges for each Item are 1-
8. As each subsequent item is reviewed, the scrollable options available will be the one 
currently selected for that Item plus any unassigned codes. By default, 1, 2, 7 and 8 are 
used which leaves 3, 4, 5, and 6, plus the number currently assigned to that Item in the 
scroll list.
Default
By default, the DHS/DHS-E default settings of associated Numbering Plan data...

7
Maintenance/
Troubleshooting
The System troubleshooting procedures is a logical approach to fault identification,
analysis, and correction. The key system may generate symptoms of problems that
actually occur outside of the office environment. 

Introduction7-1
Introduction
Maintaining the STARPLUS® DHS/DHS-E™ digital telephone system is a combination of 
customer database changes, facilities and apparatus moves, adds and changes. These 
requirements are handled properly by practicing the techniques, illustrations and step-
by-step instructions listed in the previous sections of this manual.
When installed properly the DHS/DHS-E
 performs relatively maintenance-free. From time 
to time the digital telephone instruments may become dirty or dusty...

7-2CPU/Power LED
Table 7-1: Central Processor Unit (CPU)
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
No system operation
LC D te le pho ne s  
have no display
No LED’s lit at any 
telephonesCPU
Heartbeat/Power
LED Not LitNo AC input Check commercial AC outlet.
KSU Cord Verify that both ends of AC cord are plugged in.
Power On 
SwitchSwitch the KSU AC power switch to the ON 
position.
AC Fuse Inspect and replace KSU exterior AC input fuse.
DC Fuse Inspect and replace system DC output fuse.
No system...

CPU/Power LED7-3
Table 7-2: Key Telephone / SLT Telephones Dead
SYMPTOMDIAGNOSTIC 
AIDCAUSE CORRECTIVE ACTION
Telephones/station 
apparatus dead.CPU Heartbeat / 
Power LED LitShorted Station 
Pair(s)1. At MDF, remove cross connect (jumper) 
wires at the punch-down (66M1-50) block 
going to all affected stations.
2 Reconnect stations one by one verifying 
that each power up correctly.
Key Telephone Bad Key 
Te l e p h o n eWhen one is found that will not power up:
1. Disconnect the telephone at the user...

7-4CPU/Power LED
Table 7-3: Erratic Key Telephone Operation
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
Erratic operation:
LC D D is pl ay a nd  
LEDs
Faint data noise 
during background 
conversationDigital Volt/OHM 
meterCable distance is too 
long for gauge of 
cable used. 
Non-standard 
telephone cable 
being used or 
multiple digital 
stations fed from 
one common cable.If a key telephone is not receiving clear 
2B+D signal from KSU, test as follows:
†Test cable with a known good keyset.
†Check...

CPU/Power LED7-5
Table 7-5: Key Telephone (cannot hear)
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
Cannot hear 
(handset)Key Telephone Component Failure1. Verify MUTE is not lit.
2 Lift handset, ICM tone should be heard 
over the handset.
3 Press [SPKR] key, observe red LED and 
place handset on hook.
†If ICM tone is heard over the 
loudspeaker, but was not heard 
through the handset in Step 1, 
exchange handset assembly with 
another known working unit.
†If ICM tone is still not heard after...

7-6CPU/Power LED
Table 7-8: Static/Noise During Conversation
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
Static and/or noise 
can be heard during 
a conversationLogic of 
eliminationIf you can hear the static, is it on 
intercom handset to handset calls?
If yes, do you hear the static when you 
call any other ICM stations? (The problem 
may be the telephone called or calling 
you).
Station cable wiring If static on ICM and CO line calls, verify 
wall jack connection and MDF 
connections. Correct any...

CPU/Power LED7-7
Table 7-9: CO Line Problems
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
Lines on Hold, no 
one there.System 
ProgrammingIf the customer complains of seeing 
many holding lines, and when accessed 
no one is on the other end, calls may be 
left in an abandoned state.
Outside caller 
abandons callIf the serving Central Office ( Telco) 
provides disconnect supervision:
†The KSU should be programmed (on 
a per CO line basis) to recognize an 
abandoned call (default).
†When the outside...