S e c t i o n 5 - M a i n t e n a n c e
81
Repair Procedures
On site repair is limited to replacement of system option boards or the main board.
The boards which may be replaced by a trained and competent installation engineer are:
Main 206/208 board
0+2, 1+2 & 2+2 expansion cards
Fax / voice card
V24 card
ISDN card
CLI detector card
Meter Pulse detector card.
Telephone repair on site is limited to replacement of handsets, line cords, and handset cords.
Problem Solving
Green LED not on
Check mains fuse and power connection. Led should flash 10 seconds after power up. It will light
steadily after the pin code is set. If power is ok then check that the system EPROM is correctly fitted.
If not then replace, ensuring that the pins are all seated correctly. If green LED does not flash then
check the system voltages on the test pins labelled SK37 on 206 and SK33 on 208 located between
the music on hold jack and the RJ11 connector (if fitted). If any of the 24, 12, 6 or 5 volt rails are low
then power the system down, remove all option cards and phones to establish if one is faulty before
powering back up. If a faulty expansion card or terminal is not found and if the power is not restored
on the test pins then return the unit to the dealer.
No dial tone when you access an external line
Check that PSTN dial tone is on the exchange line by connecting directly to the line at the master
socket.
Check that class of service 5 is not assigned to the extension. Check that dial tone is given when you
select a B channel directly on an ISDN terminal connected to the S bus. If not make sure the ISDN
bus is not set for data calls only, without dial tone. If the analogue line is not connected and if you are
using ISDN then make sure you have programmed the system to select ISDN channels first.
Extension is not ringing on incoming exchange line calls
Check that the correct ringing assignment has been made. Default is that all extensions ring on
incoming calls. If there is an interrupted dial tone then Do Not Disturb, Internal Diversion or
External Call Forwarding may be active.
For terminals check that the Line 1 lamp is not flashing, if so re-connect the terminal to re-
program. On the 208 system remember that terminals will not work correctly on power fail
extensions 11 and 12.
If the extension is a SLT then enter *750 EXT # at the extension where EXT is the extension
number to ensure it is not incorrectly programmed as a terminal.
Check the ringer is switched on, on each SLT.
Outgoing calls do not get through
Check that the line or host PABX extension is set for tone (DTMF) dialling if the extension you are
using is DTMF. If the external line is pulse signalling then the extension must be pulse mode and
vice versa. Check also that call barring class 5 (no outgoing calls allowed) is not assigned.
