Specification Number AP13-09 Issue Number 7 Date 5/8/98
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POWER
These units are normally battery operated :-
Internal Batt Type
3 off D size Alkaline Cells
Batt Life
The battery life is codec dependent. Approximate figures are :-
G722 Codec More than 10 Hours
APTX Codec 10 Hours
Dual Codec 8 Hours
MPEG Codec 6 Hours
Provision is also made for an external DC supply :-
Ext. DC Connector
2.5mm Mates with RS 486-634
Ext. DC Volts
6 to 9 volts DC (Sleeve is -ve)
ISDN CIRCUIT
Line
Uses 1 off ISDN2 B Channel at 64kbit/s
Connector
RJ45
Standards
This equipment operates correctly with ISDN2 circuits which
meet any one of the following specs:-
ETSI Euro ISDN (Net 3)
BTNR 191
I 420
CODECS
Option 1
G722 Locking by Statistical Analyses
Option 2
APTX100
Option 3
Dual Codec (APTX & G722)
This codec automatically detects the system in use at the other
end of the ISDN link and sets itself to agree. No operator action
is required.
Option 4
ISO/MPEG Layer 2
This codec first sends MPEG code at a 24KHz sample rate.
After approximately 2 secs it
sends G722 code instead. If, at any time, it receives G722 code
or MPEG code at 48, 32, 24 or 16 KHz sample rate it will
automatically start sending the same code at the same sample
rate. It is possible to force this codec to operate in any
particular mode by dialing special codes.
Line Up
Max digital code = +14dBu
SW56 OPERATION
This X version of the GSGC4 or 5 will operate as the ISDN end
of a circuit whose other end is operating on a switched 56
service. This unit will not operate if connected directly to a
switched 56 exchange.
