ADTRAN 1200270L1, Manual

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Chapter 2. Installation
2-8 DSU III ARdc User Manual 61200270L1-20
• Parity bit - Ignored
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
• Data bits - 7
• Parity bit - Odd
Command Structure
[SYN][SYN][STX][V.25 bis COMMAND][ETX]
Asynchronous Option
Character Format
• Start bit- 1
• Data bits- 7
• Parity bit- Even
• Stop bit- 1
Command Structure
[V.25 bis COMMAND][CR][LF]
Command Descriptions
The ADTRAN V.25 bis command set is a subset of the CCITT V.25 bis com-
mand set. In addition to the CCITT commands supported, ADTRAN has
added configuration commands for both local and remote DSUs. The
ADTRAN V.25 bis command set follows: