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Eicon Connections for Linux User’s Guide

page 79

Clear Request Packet Format

The format for a Clear Request Packet is shown below. Octets consist of bits numbered 7 to

0 where bit 0 is the low order bit and is transmitted first. Octets are consecutively numbered

starting from 1 and are transmitted in this order. The General Format Identifier can be coded

0001 for modulo 8 or to 0010 for modulo 128. See the CCITT X.25 Recommendation for details.

*Semi-octet of zeroes is present only if combined total digits in DTE address block is odd

The first three octets (up to and including Packet Type Identifier) are handled by the Eiconcard

X.25 Development Kit. The rest of the octets are built from information supplied by the

application program.

General Format ID Logical Channel Group

Logical Channel Number

Packet Type Identifier

0 0 0 1 0 0 1 1

Calling DTE Address Length Called DTE Address Length

Called DTE digit-1 ...

Callled DTE digit-n Calling DTE digit-1

Calling DTE digit-2 ...

Calling DTE digit-n 0* 0 0 0

Facility Length

Facilities

...

Call User Data

...

Clear Request Packet Format

Diagnostic Code

Clearing Cause

Bit

7 6 5 4 3 2 1 0

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 90 91

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Eicon Networks S52 Betriebsanweisung Seite 81