I n s t a l l a t i o n & P r o g r a m m i n g M a n u a l
82
Other ISDN equipment will not work with the telephone system
Check the polarity of the connectors on the MDF to Figure 4-13 on page 73. Ensure that your
ISDN access is configured as 'Point to Multipoint', your network operator will provide this
information with the ISDN line. Also, check the polarity of the ISDN transmit pair on the MDF, if
reversed it may cause the system to work correctly on its own, but not in parallel with other devices.
The transmit pair are labelled Tx+ and TX- on the MDF CO connectors.
Cannot carry out system programming
System programming is possible only from the master extensions – 12 on 206 and 13 on 208 system.
Also, if the PC program is running is will have programming control and the system will block
attempts to program. Select the ‘Control’ button on the monitor screen in the PC program to release
programming control. It is now possible to program from the master extension.
The phone rings back when the handset is replaced
The hook switch contacts may be bouncing and simulating a hook-flash before hanging up properly.
Try setting the extension as DTMF only and programming the recall time window to eliminate the
problem. See ‘DTMF Extensions’ on page 45 for programming details.
Music on hold is not audible
Dial the code *9 PIN 151 # at the master extension to enable external music through the music jack.
Also, ensure the music volume is playing at a loud enough level. Code *9 PIN 150# cancels this and
the system operates with a hold tone.
Unable to transfer calls to an extension
Check that the extension involved has not been assigned call barring class 5, which prevents transfer
of exchange line calls to the extension from another extension with a different class of service. Check
that if an Executive or Standard Terminal had been used previously that the correct setting was then
entered for single line telephone operation. Press *7 50 extension # and ring the extension from
another phone to check this.
Check that the time break button (R) on the telephone is set correctly, 100ms for Australia, 600ms
for New Zealand.
There are ‘silent’ calls on extensions
Incoming callers who are trying to send a fax are not pressing the START button after the tone or
message and the fax switching has timed out and caused a general call. Check that the recorded
message gives a clear instruction. Also, some older fax machines may not send CNG tone and this
causes ‘silent’ incoming fax calls which need to be transferred manually to the fax machine. NOTE:
This is not a limitation of the telephone system.
External call forwarding / trunk-trunk transfer breaks down
This is because there is a time limit of 30 seconds allowed for external call forwarding and trunk-
trunk transfer. A warning tone will be heard 10 and 5 seconds before this happens, either user may
extend the call by pressing digits 1 to 9, to increase the call time in multiples of 30 seconds. E.g.
pressing '4' will increase the call length by 2 minutes before it is cut off.
PC program or printer do not operate
Verify that the PC and printer are correctly wired – see page 73. The printer must be a serial printer
(4800 baud setting). To send the data to a printer enter *8 251# at the master extension. To connect
to a PC dial *8 250# at extension 13. Check that there is no COM port conflict with other devices
such as modems on the PC. The default pin code for the PC program is 7373 and the menu allows
you to select a COM port setting under the GENERAL PARAMETERS menu choice, selecting
then FACTORY DEFAULT when prompted.
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