File AP72-03 issue 3
GENERAL INFORMATION
GSGC6
This unit is a 1U subrack designed to provide ISDN facilities in a studio, it contains a
terminal adapter, a mains power supply, some control electronics and space for 1 or 2 codec
type cards.
The terminal. adapter is a 'Dataflex' IM90 module. This is a twin unit capable of dealing with
both B channels of an ISDN 2 circuit at the same time. If the GSGC6 is fitted with 2 codec
cards it can be considered as two completely independent units. These are known as PORT 1
and PORT 2. The front panel (See drawing number A2-12822) has LEDs to show the state of
port 1 and port 2.
There are three ways of controlling a GSGC6:-
First, it is possible to use the unit with very little extra equipment. The GSGC6 can be
set to auto-answer incoming calls. It is also possible to store two numbers, one in port
1 and one in port port 2. Either number will be automatically dialled if the
corresponding DC loop is made on a rear panel connector
Second, it is possible to remote control it from a computer terminal using the 2 off
RS232 connectors fitted on the rear panel. The command language used, is listed later
in this book.
Finally we manufacture a dedicated controller type GSGC7 .
GSGC7
This unit has been specifically developed to control the GSGC6. Our drawing number A4-
12866 shows the general facilities. It would normally be positioned in a studio control room
and remote control the GSGC6 which would be located in an apparatus room.
Used to originate and answer calls , it contains a dial, a display, and some LEDs. These LEDs
indicate the state of the ISDN line and the Codec
Up to 30 ISDN numbers can be held in non volatile store. These can be given names as well
as numbers to help the operator.
If the GSGC6 is fitted with two codecs, it is preferable to have two GSGC7s. These can then
be used simultaneously in two different studios producing two totally independent
programmes.
