I. SDLC/HDLC Protocol
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I.I. SDLC/HDLC Protocol
SDLC/HDLC Protocol
SDLC/HDLC Protocol
SDLC/HDLC Protocol
SDLC/HDLC Protocol
Introduction ................................................................................................................................ I-1
Product Application ................................................................................................................. I-1
SDLC/HDLC Overview .......................................................................................................... I-2
Performance Guidelines ........................................................................................................... I-4
Exceptions ................................................................................................................................... I-4
Multiplexer Configuration ....................................................................................................... I-4
Channel Parameters ......................................................................................................... I-5
Channel Type ........................................................................................................... I-10
Clock Source ............................................................................................................. I-11
Data Encoding ......................................................................................................... I-13
Channel Speed .......................................................................................................... I-14
Idle Character ........................................................................................................... I-16
EIA Signal Propagation ......................................................................................... I-17
CTS-RTS .................................................................................................................... I-18
Max Block ................................................................................................................. I-20
Flow Control ............................................................................................................. I-21
Channel Statistics .................................................................................................... I-22
Channel Status (CHNL STATUS) ......................................................................................... I-24
General System Requirements ................................................................................................ I-24
Cyclic Redundancy Check .............................................................................................. I-24
Frame Abort ...................................................................................................................... I-24
Erroneous CRC ................................................................................................................. I-24
Error Conditions in the Multiplexer ...................................................................................... I-25
Receiver Overrun .............................................................................................................. I-25
No Buffer Available (for Output on Link) ................................................................. I-25
Transmission Underrun .................................................................................................. I-25
Recommendations ..................................................................................................................... I-25
This appendix defines the requirements for enhancing the capability of the 3028
Turbo (CTS 2031 Turbo)
Multiplexer to provide support for bit-oriented synchro-
nous protocols (SDLC/HDLC) on some or all of the channels
INTRODUCTION
INTRODUCTION
INTRODUCTION
INTRODUCTION
INTRODUCTION
The SDLC/HDLC protocol permits multiplexing of bit-oriented synchronous data
from selected channels on a demand basis across a high-speed composite link
between two multiplexers onto corresponding remote channels. The multiplexers
operate transparently (with the exceptions noted in the Error Conditions in the
Multiplexer section) to connect SDLC/HDLC stations. The multiplexers are not
sensitive to any of the SDLC/HDLC procedural or high-level protocol features
(such as SNA), but certain anomalies may arise due to data loss.
Figure I-2 identifies the EIA signals for the SDLC/HDLC Channel.
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APPLICATION
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