Communications Set-Up Parameters; Modem Protocol - Digital Equipment Rainbow 100 Technical Manual

2.6.2 Communications Set-Up Parameters
You can change the following communications parameters on the Rainbow 100 computer:
•
Data bits per character
•
Parity
•
Transmit speed (baud rate)
•
Receive speed (baud rate)
•
Protocol
•
Auto-XON/XOFF
•
Transmit break
•
Modem stop bits
•
Received character parity
•
Disconnect delay
•
Disconnect character use
Refer to Paragraph 2.4 for directions on setting these parameters.
2.6.3 Modem Protocol
The Rainbow 100 computer uses a full-duplex modem. A full-duplex modem transmits and receives
characters at the same time.
The rules for communications, the signals used, and how the signals are interpreted all form the communi-
cations protocol. In the Rainbow 100 computer you can select one of three communications protocols,
listed in Table 2-6.
Selection
FDXA
FDXB
FDXC
Table 2-6 Communications Protocols
Description
Full-duplex with no modem control
(data leads only)
Full-duplex with modem control
Asymmetrical full-duplex with
modem control
2-23
Usual Application
Full-duplex communications with direct
connection to a remote computer or with a
modem that does not use modem control
signals.
Full-duplex communications with a
modem that uses modem control signals.
Full-duplex communications with a half-
duplex modem using the secondary chan-
nel. FDXC requires a special cable.