Specifications

SQ: 8-4
RS3: Service Quick Reference Guide
PeerWay Interface
EIA Options
EIA Option
Description
CTS SCI configured as a m odem:
When DTR (pin 20) is asserted by the host, the SCI can transmit.
SCI configured as a terminal:
When DCD (pin 8) is asserted by the host, the SCI can transmit.
MODEM SCI configured as a terminal:
The SCI monitors the modem Carrier Detect (CD) signal to
determine when the host has called in.
When DTR (pin 20) is asserted by the S CI, the modem answers the
phone and establishes the carrier.
When DTR is dropped by the SCI, the modem hangs up the line.
Unless dropped to hang up the line, this pin remains asserted once
software i nitialization i s complete.
DCD (pin 8) is asserted by the modem to inform the SCI that the
data carrier is detected.
NONE No EIA option is selected.