ISDN_CONNECT.ISDN_REQ(D7isdn)

ISDN_CONNECT.ISDN_REQ -- ISDN outgoing physical connection request

Synopsis

   #include <sys/stream.h>
   #include <sys/mdi.h>
   #include <sys/types.h>
   #include <sys/scoisdn.h>
   
   typedef struct isdn_connect_req
   {
       isdnCtrlr_t       ctlr;
       isdnCIPvalue_t    cip;
       isdnCalledNbr_t   calledNbr;
       isdnCallingNbr_t  callingNbr;
       isdnCalledAdr_t   calledAddr;
       isdnCallingAdr_t  callingAddr;
       isdnBproto_t      bProto;
       isdnBC_t          bc;
       isdnLLC_t         llc;
       isdnHLC_t         hlc;
       isdnAddInfo_t     info;
   } isdn_connect_req_t;

Description

The ISDN_CONNECT.ISDN_REQ message consists of one M_PROTO(D7str) message block initiating the set-up of an outgoing physical connection. An application only has to offer the relevant parameters; that is, Controller, CIP value, B protocol and (usually) Called Party number. Every other structure can be empty (0 length); in this case, default values will be used for the remaining structures.

If an application offers Bearer Capability, Low Layer Compatibility, and/or High Layer Compatibility, the parameter will be used without checking the resulting combination.

Parameters

ctlr: Controller; see isdnCtrlr(D4isdn).
cip: Compatibility Information Profile; see isdnCIPvalue(D4isdn).
calledNbr: Called party number; see isdnCalledNbr(D4isdn).
callingNbr: Calling party number; see isdnCallingNbr(D4isdn).
calledAddr: Called party subaddress; see isdnCalledAdr(D4isdn).
callingAddr: Calling party subaddress; see isdnCallingAdr(D4isdn).
Bproto: B protocol to be used; see isdnBproto(D4isdn). The absence of a B protocol value (that is, coding as an empty structure) will result in the default protocol behavior: ISO 7776 (X.75) and window size 7. This selection gets overall connectivity with the benefits of HDLC error recovery. However, ISO 7776 deals with a default maximum data length of 128 octets, while the SCO ISDN implementation can handle at least 2048 octets, depending on the values of the ISDN_REGISTER ioctl called by an application.
bc: Bearer capability; see isdnBC(D4isdn).
llc: Low Layer Compatibility. See isdnLLC(D4isdn).
hlc: High Layer Compatibility. See isdnHLC(D4isdn).
info: Additional information elements; see isdnAddInfo(D4isdn).

References

Intro(D4isdn), Intro(D7isdn)

ISDN_CONNECT.ISDN_CONF(D7isdn), ISDN_CONNECT.ISDN_IND(D7isdn), ISDN_CONNECT.ISDN_RESP(D7isdn)

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