ACC HDLC/LAP-B (ABM) User's Guide

Protocol Specific Configuration
Port-Definition
Chapter 446
Port-Definition
On 8-port cards, the port must be defined as operating in SDLC mode.
The ACC cards may use either an external (modem supplied) clock, or an
internal (card supplied) clock. With an external (modem supplied) clock,
the speed is for documentation purposes only, and will not be used by the
ZCOM system.
The clock multiplier should be x1, and the encoding mode would
normally be NRZ (although NRZI may be used).
A sample Port-Definition is as follows:
Port 01:04 RS232 57600 Ext SDLC x1 NRZ
Refer to the section on the TTGEN utility in the ACC Utilities Reference
Guide for more information on specifying the port and subchannel
parameters.