AMX TXC16 Plus Specifications download pdf (Page 105)

SG-2000 MANUAL 98

The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA

16.2 Short Haul Modems/Auto-Answer Devices

The second way to achieve remote control of the SG-2000 is to use a number of

telephone lines and a short haul modem. The configuration is basically the same

as the extension via telephone wiring, described above, but short haul modems

(1200 baud) are used to improve the reliability of the computer data which is

exchanged between the control head and the main radio unit.

The audio and PTT circuits may be extended using either separate wiring and a

voice-operated transmit telephone patch, such as the SGC TEL-TWO (SGC Part

Number: 52-75), and a separate DC loop for PTT control, or by installing three

pairs for audio: Two for receive, two for transmit, and a PTT pair. (Please see

AUTO-ANSWER DEVICES below.)

16.3 Line of Demarcation

SGC has found it important in all remote control installations involving the SG-

2000 and PRC-2250 series radios to make clear from the outset of design and

installation that the responsibility of SGC is to provide the highest quality radios

available. However, the responsibility of SGC does not extend to design of

computer networks, microwave networks, fiber optic systems, or telephone

systems which are used to control the radios unless specifically negotiated and

agreed to in advance.

The distinction is this: SGC and its world wide dealers are responsible for pro-

vision of equipment only and do not provide system design or warrant

operations beyond the specifications of the radio equipment. The lines of

demarcation (or "demark" in telephone company terminology) is as follows:

Remote Control: RS-232 (DIN-9) plug of SG-2000/PRC-2250

Remote Audio: J-301 rear panel of SG-2000/PRC-2250

Push to Talk: J-301 rear panel of SG-2000/PRC-2250

SGC is not responsible for providing integration with

networks, devices, and systems which are beyond demark.

SGC and its dealers do not provide system integration with complex networks.

Such services may be undertaken from time to time by either SGC or its dealers,

but arrangements to do so are always separate agreements from supply of radio

equipment.

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AMX TXC16 Plus Specifications Page 105