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 fields are 
listed below:
†STATION = 1
†GROUP TYPE =
 Hunt
†CO LINE =
 7
†CO LINE GROUP =
 2
†HUNT GROUP =
 8
Programmable Range
The programmable range values for the DHS/DHS-E Numbering Plan are listed below:
†STATION = 1-6
†CO LINE = 1-8
†CO LINE GROUP = 1-8
†HUNT GROUP = 1-8
Use this feature only at initial installation. Changing this feature after initial installation 
requires the reprogramming of flexible buttons. Use of the leading digit 7 for stations or 
groups may cause conflicts with AVP/Dispatch Voice Mail. 
						

							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 and require 
cleaning. We suggest the use of a clean, dry cotton (or other soft, absorbent) cloth to 
wipe the instrument clean. Use of chemicals to clean the telephone plastics is NOT 
recommended since some chemicals can cause permanent damage to the telephone 
finish. If deep soiling conditions exist for the telephone to be cleaned, use of specialized 
telephony cleaning solutions may give satisfactory results. When trying any cleaner for 
the first time we suggest that it be applied to the telephone instrument underside in a 
small sample area to assure that the desired results are obtained before proceeding.
Problems such as system restarts (from temporary AC power interruption), fading (from 
the long distance carrier), or dropped calls (caused by internal user randomly pressing 
holding CO Line buttons) all are common situations that are not the result of a system 
component or software failure.
The System Troubleshooting Section attempts to provide the service technician with 
some quick, and reliable, tools to diagnose installation related or service related problem 
reports.
KSU
Component failures at the KSU are limited to power distribution (fuses), improper or 
shorted wiring, CO or station interface failure, or auxiliary circuit problems.
CPU/Power LED
The CPU/Power heartbeat LED is located on the front of the DHS
 KSU adjacent to the 
power switch, and on the Right Side of the KSU panel of the DHS-E
. If the AC input and DC 
output power circuits are operating, the LED will be on steady. If the CPU is running, not 
locked up or failed, the LED should be flashing at a fast rate. The Initialization switch 
should be in the right (ON) position. 
						

							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 operation
LCD telephones may 
have data frozen on 
displays
No LED’s lit at any 
telephones or 
intermittent
CPU is locked upCPU
Heartbeat/Power
LED LitInitialization 
Switch1. Verify initialization switch operated to the 
ON position.
†If the Initialization switch is not in the ON 
position at the time the KSU is powered, the 
Power Up Initialization sequence at the end 
of Chapters 2 and 3 should be followed.
†If the system was properly initialized, 
proceed to step 2.
2 Power down/up and observe system 
recovery. ( The system power should remain off 
for a least 5 seconds for this test). If no 
heartbeat is seen proceed to step 3.
3 Power down, remove KSU cover, detach all 
station cabling (25 pairs), and power up. (The 
system power should remain off for a least 5 
seconds for this test). If no heartbeat is seen 
proceed to step 4.
4 Power down, inspect for the following: 
†Loose or unplugged 3x8 Expansion Module, 
6 Port CO Module or Option Module ribbon 
cables.
†Improperly aligned ribbon cables.
†Improper installation of the system software 
EPROM, located in socket U9 CPU Module.
EMERGENCY ACTION
Since the unique battery protected 
customer database will be erased 
and the system will boot up with 
default programming.1. Operate the initialization switch to the OFF 
position.
2 Return the initialization switch to the ON 
position.
3 IF CPU/POWER LED is still not flashing, 
replace the KSU.
4 Initialize and test according to the Power Up 
Initialization sequence. 
						

							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 
location.
2replace with a known working telephone.
†If the new station power up is normal, 
replace the first connected key telephone.
†If the new station also does not power up, 
follow the remaining steps for the 
individual station.
†If none power up; remove all cross connect 
wiring that run between the 3x8 Module 
66 block and the station cable 66 block.
3 Connect one station directly to the 3x8 
Module 66 block station pair.
Shorted station 
cableIf the key telephone power up is normal: 
inspect, repair or replace the station cable.
Shorted KSU-MDF 
cableIf the key telephone does not power up: 
inspect, repair or replace the 25 pair cable 
from the 3x8 Module to the MDF.
Once the 25 pair cable from the 3x8 Module to 
the MDF is inspected, repaired or replaced; 
connect the known working telephone directly 
to the 3x8 Module 66 block station pair.
3x8 Module 
ribbon cable not 
properly aligned 
during installationIf the telephone still will not properly power 
up, power down the system and inspect the 
3x8 Module ribbon cable for properly aligned 
installation. If any problem exists here correct 
it and power up the system.
3x8 Module bad  If no problems can be found at the ribbon 
cable connector, replace the 3x8 Module.
CPU Module bad  If the problem persists, replace the KSU.
The key telephones use only one twisted cable pair for power, data control and voice 
communications. There are no fuses for station interface protection. Instead, a current sensing 
poly-switch limits excessive current going to each station. If a station cable pair is shorted or a 
telephone’s DC power supply is damaged, the poly-switch will temporarily
 open to protect the 
KSU 3x8 Module circuitry. 
						

							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 wiring, cables, and connectors.
†Replace card.
†Check AC voltage.
Table 7-4: Key Telephone (cannot be heard)
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
Other party cannot 
hear you. (handset)Key Telephone 
(other station)Component failure1. 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. 
						

							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 
repeating the test in Step 1, replace 
the coiled handset cord. If the cord is 
defective, the original handset is 
probably okay.
†If ICM dial tone still cannot be heard, 
replace key telephone.
Table 7-6: Speakerphone (cannot be heard
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
Other party cannot 
hear you on your 
speaker phoneKey telephone 
(other station)Connections, 
component failures1. Verify MUTE is not lit.
2 Press [SPKR] and listen for tone over 
the speaker. 
3 Call a known good working station. 
( The distant party should be using the 
handset). 
4 If the other party cannot hear you, lift 
handset and verify proper handset 
operation.
Table 7-7: No Sound From Speaker
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
No sound over 
speakerKey telephone Connections, 
component failure1. Press [SPEAKER] button (red LED).
2 If you can hear ICM tone over the 
handset, but not the speaker, replace 
the key telephone. 
						

							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 problems 
found.
Bad component If noise persists, replace handset cord.
Telco problem
†If static only on outside CO calls, do 
other stations hear similar static 
noise?
†If other stations hear static, is it only 
on one CO line? Which one?
†If on several CO lines, the Telco may 
have a wet cable. Disconnect the CO 
line from the KSU, and using a dial test 
handset (buttset), place a call and 
listen for static. If noise is present, 
contact the Telco.
KSU-MDF wiring If noise is present only when the KSU is 
connected to the CO lines, inspect, 
repair or replace the CO line feeder 
cables that plug into the KSU interface 
modules (3x8 and 6-Port CO).
Possible module 
problem
†If noise is still present on a certain CO 
line, and CO incoming line cord has 
been exchanged, move this cord (CO 
line) to another KSU line position. If 
noise is now removed on the new CO 
line interface, something is bad with 
the KSU input jack.
†Call Customer Service. 
						

							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 holding party 
hangs up, the CO line interface 
detects change in CO voltage for the 
associated line.
†The KSU then removes the inside 
Hold indication at all telephones and 
restores the line to idle.
User error Auto Hold Allow may be enabled at a 
station that is unsure of the proper 
operation of this feature.
†If so, insure that inside users do not 
accidentally place calls on Hold while 
skipping from one CO line to 
another, refer to the Key telephone 
User Guide.
†By programming Auto Hold Deny 
(code F94) at the abusing stations, 
incoming CO lines will not be 
accidentally placed on Hold.
Table 7-10: Lines Stay Busy
SYMPTOM DIAGNOSTIC AID CAUSE CORRECTIVE ACTION
Lines sometimes 
show busy even 
though no one else 
is in the office, or no 
one is using the line.System 
ProgrammingCustomer confusion 
or Programming 
errorVerify CO line programming for DISA, 
External Call Forwarding, and Day/Nite 
Service.
( The system will hold up certain trunk-
to-trunk calls until a forced disconnect 
interval time is reached.)