From: [email-masked]
Date: Tue, 8 Mar 94 12:21:49 +0100

Basic Conversation and OSI TP

We detected an unclear intem in the CPI-C 2.0 document
concering Basic Conversation and OSI TP.

If a program uses basic conversation a buffer sended by Send_Data
may typically have the following structure:

  +--+------------+--+-----------------+
  !LL! Text       !LL! Text            !
  +--+------------+--+-----------------+

A program sends this buffer using Send_Data (..., buffer, send_length, ...)
where 
	buffer          is the address of the buffer
	send_length     is the lenght of the buffer

If we want to implement basic conversation with OSI TP there are
2 possibilities:

1  The CRM sends this buffer using one UD-TRANSFER-request.
   The LL fields are carried as part of the octet string.

2  The CRM sends this buffer using two UD-TRANSFER-requests.
   The LL fields are mapped to the length parameter of the
   UD-TRANSFER-request.

The CPI-C 2.0 document has to describe which implementation is the
true one. Otherwise it may happen, that CPI-C programs using Libraries
from different companies cannot work together.

Regards
Peter Binninger

-----------------------------------------------------------------------------
Peter Binninger                         Voice: (+49) 7531-87-4758
Computer Gesellschaft Konstanz mbH      Fax:   (+49) 7531-87-4888
(Siemens Nixdorf Informationssysteme)   Email: [email-masked]
Max-Stromeyer-Strasse 116
78467 Konstanz
Germany