Black Box ME801-C, Руководство пользователя

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6
SHORT-HAUL MODEM-B SYNC (SHM-B SYNC)
User Controls — (1) Front-mounted pushbutton to turn
loopback ON and OFF;
(6) Internal pairs of jumper posts for setting
the data rate;
(3) Internal pairs of jumper posts for setting
CTS delay
Indicators — (2)Front-mounted bicolor LEDs for transmit
status and receive status; these light green
for a “low” logic level (–3 to –25 V) or red
for a “high” logic level (+3 to +25 V)
Connectors — RS-232: (1) Rear-mounted DB25 female;
Line: (1) Internal 4-position screw-terminal
block
Leads/Signals
Supported —
RS-232: Transmit Data (TD), Receive Data
(RD), Request to Send (RTS), Clear to
Send (CTS), Data Set Ready (DSR), Signal
Ground (SGND), Carrier Detect (CD),
Transmit Clock (TC), Receive Clock (RC),
and Data Terminal Ready (DTR)—
Pins 1 through 8, 15, 17, and 20
respectively;
Line: TX+, TX–, RX+, and RX–