File 71-10 Page 3
INSTALLATION
INFORMATION
ISDN INSTALLATION
To install this equipment refer to drawing A2-12812. It is only necessary to:-
1)
Plug in the ISDN cable (RJ45) from the mixer to the BT ISDN point.
2)
Plug in the Mains PSU (if required) from the rear of the mixer to a standard
13amp mains socket.
3)
Plug in the 1 or 2 Headsets into the connectors on the front of the mixer.
X21 INSTALLATION
Please ignore this section if you are only using the equipment on ISDN.
There is a rear panel X21 interface to permit the connection of an external terminal adapter or
any other compatible data circuit such as a satellite. The X21 connector is a 15pin D fixed
socket with the following standard pinout:-
Pin 1 =
Shield
Pin 2 =
Transmit data (leg A)
Pin 3=
Control (leg A)
Pin 4 =
Receive data (leg A)
Pin 5 =
Indicate (leg A)
Pin 6 =
Element timing (leg A)
Pin 7=
Byte timing A Input (Optional Negative frame pulse)
Pin 8=
Signal Ground
Pin 9=
Transmit data B Output (Data from Codec)
Pin 10=
Control B Output (Pulse high when 'Hang-up' pressed)
Pin 11=
Receive data B Input (Data to Codec)
Pin 12=
Indicate B Input (Low enables X21)
Pin 13=
Element timing B Input (Data latched on low to high transition)
Pin 14=
Byte timing B Input (Optional Positive frame pulse)
Pin 15=
No Connection
This interface will only operate at 64Kbits/sec. It is not suitable for use at 56Kbits/sec.The
equipment will operate if both the ISDN and the X21 ports are connected. Under these
circumstances the first incoming call will be accepted by the equipment. If a subsequent call
comes in on the other circuit while the box is on line, the ISDN led is made to flash.
