5
ASYNC SHM-NPR
1. Specifications
Transmission Mode
— Asynchronous, full or
half duplex
Transmission Line
— 4-wire unconditioned
telephone line (two twisted pairs)
Data Rates
— Up to 19,200 bps
Transmission Level
— -6 dBm
Transmission Controls
— DCD (Circuit 109) turns
on after recognizing the receive signal from the
line; CTS (Circuit 106) turns on 1 or 12 msec
(selectable) after the terminal raises RTS
(Circuit 105)
NOTE
To ensure proper operation, the equipment connected to
the SHM-NPR should provide at least one of the following
signals: RTS (Circuit 105) or DTR (Circuit 108.2).
Transmission Range
— 2 miles (3.2 km) on 24 AWG
wire at all speeds up to 19,200
