DCB V.23 Panduan Memulai Cepat - Halaman 2

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DESCRIPTION

The V.23 modem operates at 0 to 1200 bps asynchronous, with FSK

modulation. It uses the latest DSP modem circuitry to insure

excellent performance and future availability. It has 900 hz soft

carrier turn off for multidrop applications and an anti-streaming

option. Standalone and PC half card configurations are available.

The PC card uses the internal ISA bus for power and ground. The PC

card fits into a 20 slot rack mount chassis that is only 7" high. The

phone line connector is an RJ-11 for 2 wire or 4-wire leased line

operation. Transmit is on positions 3 and 4, receive 2 and 5 of the 6

position jack. For 2-wire operation, a special cable configuration is

required (see Section 5).

The modem has DIP switch controls for reset, anti-streaming, phase

equalizer, constant or controlled carrier, soft carrier turn-off, 2-wire

or 4-wire line, transmit level and loopback. The modem also has a

pushbutton switch for local digital loopback. The DIP switches are

accessible from the front of the modem. A pushbutton loopback

switch is located on the rear of the unit.

V.23 ASYNC MODEM

POWER

TXD

RXD

RTS

CTS

DCD

TEST

TERMINAL

TELCO

POWER

LOOP

12VDC