8571—Overview and specifications
322 NGT Transceiver System Technical Service Manual
Specifications
General
Environmental
Item Specification
Line loss Each line in a system can be up to 35 km (21.7 mi)
of 0.64 mm (0.03 in) PIUT (copper conductor)
NOTE
Telstra offers private lines with
guaranteed performance levels.
The system operates on standard grade lines Lines
and radio links must be duplex
Frequency response 400 Hz to 2.5 kHz ±3 dB
Noise Signal-to-noise better than 45 dB
(excludes line/radio link noise)
Signalling 1070 Hz and 1270 Hz FSK (part Bell 103) 550 baud
Revertive by command echo and verification
300 Hz control tone used with signalling and for
PTT
Power 11 to 16 V DC (12 V nom.) 200 mA, or
22 to 32 V DC (24 V nom.) 100 mA
AUSTEL permit number A91/19/0129
Rear panel connectors
Tcvr Control 8-way plug
Tcvr Audio 25-way D-type socket
DC Supply 4-way plug
Line—Option 2W 6-way 4-cct modular socket
Line—Option 4W 8-way plug
Operating temperature –30 to +50°C
(–22 to 122°F)
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