isdnB2config(D4isdn)

isdnB2config --

ISDN data link layer parameters configuration structure

Synopsis

   #include <sys/types.h>
   #include <sys/scoisdn.h>
   
   typedef struct isdnBproto {
       ...
   

       struct isdnB2config {
        isdnByte_t     addrA;
        isdnByte_t     addrB;
        isdnModMode_t  moduloMode;
        isdnByte_t     windowSize;
   

       struct
       {
           void    *dummy; /* only with protocol 2, XID response */
       } xid;
       } B2config;
   

       ...
   } isdnBproto_t;

Description

The isdnB2config structure offers offers additional configuration information for the B2 protocol specified in isdnB2proto(D4isdn). isdnB2config is only used for B2 protocols 0, 2, and 3. The complete B-channel protocol information is defined by isdnBproto(D4isdn).

Parameters

The addrA, addrB, and xid parameters have different meanings and default values depending on the selected B2 protocol:

addrA

B2 protocol 0:: link Address A, default is 0x03
B2 protocol 2:: link Address, default is 0xC1
B2 protocol 3:: bit 0. '0' = automatic TEI (Terminal Endpoint Identifier) assignment procedure; '1' = fixed TEI. In this case, Bit7 - Bit1: TEI value.

addrB

B2 protocol 0:: link Address B, default is 0x01
B2 protocol 2:: not applicable
B2 protocol 3:: not applicable

moduloMode

mode of operation

   typedef isdnByte_t isdnModMode_t;

Valid values are:

BPROTO_MODE_NORM: normal operation (default)
BPROTO_MODE_EXTENDED: extended operation

windowSize

window size; default is 7

xid

B2 protocol 0:: not applicable
B2 protocol 2:: the content of the XID response that is sent when an XID command is received
B2 protocol 3:: not applicable

References

Intro(D4isdn), Intro(D7isdn)

``SCO ISDN adapter drivers'' in Developing MDI network adapter drivers