V.25 Bis Commands; Sdlc Option; Character Format; Command Structure - ADTRAN DSU III AR User Manual

V.25 Bis Commands

When configured for the V.25 bis option, the DSU III AR accepts in-
band dialing and configuration commands from both synchronous
and asynchronous DTE ports.
The V.25 bis option supports the following protocols:
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•
•

SDLC Option

Character Format

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•

Command Structure

[F][A][C][V.25 bis COMMAND][FCS][F]
The address field [A] is FFH. The control field [C] is set to 13H
except for cases of multi-frame responses. For this case, the control
field is set to 03H in all but the last frame. The 03H in the control
field indicates that other frames are to follow while the 13H in the
control field indicates the final frame.

Bi-Sync Option

Character Format
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•
Command Structure
[SYN][SYN][STX][V.25 bis COMMAND][ETX]
61202011L1-1
SDLC (Synchronous Data Link Control)
BI-SYNC
ASYNCHRONOUS
Data bits - 8
Parity bit - Ignored
Data bits - 7
Parity bit - Odd
DSU III AR User Manual
Chapter 4. Configuration Overview
4-7