HDLC-Frame Protocol User's Guide (February 2004)

Protocol Specific Configuration
Port Definitions
Chapter 4 29
Port Definitions
The ports used must be defined as operating in SDLC mode. They may be
defined with either an external (modem supplied) clock, or an internal
(Card supplied) clock. With an external clock, the speed is for
documentation purposes only, and is not used by the ZCOM system.
The clock multiplier should be x1, and the encoding mode may be NRZ or
NRZI.
A sample port definition is as follows:
Port 01:4 9600 Ext SDLC x1 NRZ
Refer to the ACC Utilities Reference Guide Section on ttgen for more
information on the port definition.