ACC HDLC-NRM (SDLC) User's Guide

Overview
Supported Devices
Chapter 1 15
Supported Devices
The HDLC-NRM (SDLC) protocol implementation supports either
primary or secondary stations conforming to the above published
standards. Both point-to-point and multipoint configurations are
supported.
Modes of Operation
The HDLC-NRM (SDLC) implementation supports two normal response
modes of transmission:
• Two Way Simultaneous (TWS) transmission
• Two Way Alternate (TWA) transmission
Within TWA mode, both half duplex and full duplex options are
supported.
There is also a restricted implementation of SDLC Loop Mode operation
(see Appendix B).
Data Rates
The HDLC-NRM (SDLC) protocol product is qualified for use at line
speeds from 4800 bits per second to 19,200 bits per second. When the
HDLC-NRM (SDLC) protocol is used on an interface in a mode where
there is only a single primary or secondary broadcast terminal
configured on a line, the operation of the protocol is supported at speeds
up to 64,000 bits per second.