Sdlc 'Test' Frame - IBM 3725 Manual

(
(
(
.(
.(
(
(
(
(
(
·(
·(
c
c
f
SDLC 'Test' Frame
The format of the SDLC 'Test' frame is shown below. Refer to IBM Synchronous
Data Link Control, General Information manual, GA27-3093 for further
information on SDLC.
Flag Address Control
X'7E' X'F3'
SDLC FRAME - - - - - - - - - - -..
~1
Frame Check Sequence
(2 bytes)
INFORMATION
Flag
X'7E'
(variable length in multiples of 8 bits)
Notes:
1. The address field contains the address of the responder to which the test
frame is sent.
2. The information field can be either of the default patterns, or the personal
pattern. The personal pattern may be null.
3. The frame reflected back by the responder should be identical to the frame
sent by the responder.
Chapter 1. Introduction
1-3