File 71-10 Page 4
OPERATING INSTRUCTIONS
POWER
This equipment is usually powered from its own internal D Cells. These must be alkaline
cells, such as 'DURACELL DB2'
This equipment can also be powered from an external DC supply. There is a 3 position switch
on the rear panel marked 'EXT-OFF-BATT' . If operated in the external position while the
external supply is plugged in and present, the equipment will operate from the external supply
until it fails, when the batteries will take over automatically without losing the line.
To turn on the box select Battery or External. After a few seconds the power light will come
on. If it flashes, the batteries are low and should be replaced. The unit will work for about a
further half hour after the power light starts to flash.
To change the batteries use a coin to open the battery container on the left hand side of the
box. Replace all 3 batteries ensuring that the positive ends ( the end with the small cap) are
pointing out of the box.
CONNECTION TO ISDN2 LINE
Supplied with the equipment is a lead with an identical plug on both ends. One end must be
plugged into the ISDN connector on the rear panel of the equipment and the other end must
be plugged into an ISDN2 circuit.
TO ANSWER AN INCOMING CALL
This equipment can be set to automatically answer incoming calls or to wait for you to press
the answer button. ( See Software Configurations)
If it is configured to be manually answered an incoming call will cause the 'ISDN LINE' light
to flash and ringing to be heard in the headphones and possibly in the front panel sounder. To
answer momentarily press the answer button. Instantly the 'ISDN LINE' light should go
steady and after a few seconds the 'CODEC OK' lamp should light.
It should now be possible to talk to and hear the studio.
DIALING
To dial the studio first press and hold the 'HOLD TO DIAL' switch. Then dial the number
required. Then release the 'HOLD TO DIAL' switch. It is the action of releasing the 'HOLD
TO DIAL' switch that tells the box that your number is complete and can be sent to line.
When the switch is released 'ringing tone' will be heard in the headphones. If the connection
is successful the ISDN LINE Lamp will light. If not successful the 'ringing tone' will change
to 'number unobtainable' or 'engaged' tones.
After the connection has been made, the 'CODEC OK' light should turn on. This will only
happen if the called studio has a compatible codec.
DIALING A SUB-ADDRESS
Proceed as for dialing. Before releasing the 'HOLD TO DIAL' switch, press '#' followed by
the required sub-address. This equipment can only use '*', '#' and numeric characters for a
sub-address.
