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ISDN Layer 3 (Q.931) Call Control

Description: OpenSS7 Project Manual Pages ISDN Stack


ISDN

Section: The OpenSS7 Project Devices (4)
Updated: Sat, 20 Dec 2008 14:25:11 GMT
Index Return to Main Contents

NAME

isdn, q931 - Integrated Services Digital Network (ISDN) Driver

SYNOPSIS

#include <ss7/cci.h>
#include <ss7/isdni.h>
#include <ss7/isdni_ioctl.h>

int isdn_stream = open(device, flag);

DESCRIPTION

ISDN
is an implementation of the Integrated Services Digital Network (ISDN) Layer 3 as defined in ITU-T Recommendation Q.931. ISDN provides call control of telephone calls over the ISDN. ISDN uses the services of the Q.921 Data Link (see dl(4)) or ISDN Q.931 User Adaptation Layer (see iua(4)) to transfer packets.

ISDN is implemented as a STREAMS(4) multiplexing driver. dl(4) or iua(4) streams are linked under the ISDN multiplexing driver using the I_LINK or I_PLINK commands of streamio(7), to provide data link services to ISDN. Once linked, the streams are configured using isdn_ioctl(4) IO controls. This function is normally performed by the ISDN Configuration Daemon, isdnconfd(8). See also, isdn(8).

ISDN provides the stream types listed below. To select a stream type, the device argument to the open(2) call can be selected from the following:

/dev/isdn
This device provides the ISDN protocol service interface using the CC-primitives of the Call Control Interface (CCI) described in cci(7), as interpreted for use with ISDN as described in cci_isdn(7). This interface is suitable for use with other SS7 modules and drivers, as well as with the cframe(3) library using the OpenSwitch call framework.

NOTICES

Unlike other SS7 protocol modules and drivers providing transport services, ISDN does not provide a sockets(3) interface. This is because the special needs of call control are divorced from the sockets paradigm.

IOCTLS

All interfaces support a set of management IO controls using ioctl(2) and I_STR commands to the streamio(7) system calls on the isdn_stream file descriptor. These management IO controls are documented in isdn_ioctl(4).

FILES

<ss7/cci.h>, <ss7/isdni.h>, <ss7/isdni_ioctl.h>, <ss7/cframe_isdn.h>.

DEVICES

/dev/isdn.

SEE ALSO

ISDN(4), isdnconfd(8), cci(7), cci_isdn(7), isdni(7), isdn_ioctl(4), cframe(3).

VERSIONS

The ISDN interface is specific to the OpenSS7 ISDN stack. This is Version 2 of the interface.

CCI interfaces are consisten with CCI Revision 0.8.2.

REFERENCES

[1]
ITU-T Recommendation Q.931, Digital Subscriber Signalling System No. 1 --- ISDN User-Network Interface Layer 3 Specification for Basic Call Control, March 1993, (Geneva), ITU, ITU-T Telecommunication Standardization Sector of ITU. (Previously "CCITT Recommendation") <http://www.itu.int/rec/T-REC-Q.931/>
[2]
ITU-T Recommendation Q.932, Digital Subscriber Signalling System No. 1 --- Generic Procedures for the Control of ISDN Supplementary Services, March 1993, (Geneva), ITU, ITU-T Telecommunication Standardization Sector of ITU. (Previously "CCITT Recommendation") <http://www.itu.int/rec/T-REC-Q.932/>

TRADEMARKS

OpenSS7tm
is a trademark of OpenSS7 Corporation.
Linux®
is a registered trademark of Linus Torvalds.
UNIX®
is a registered trademark of The Open Group.
Solaris®
is a registered trademark of Sun Microsystems.

Other trademarks are the property of their respective owners.

IDENTIFICATION

The OpenSS7 Project: Package OpenSS7 version 0.9.2 released Sat, 20 Dec 2008 14:25:11 GMT.

Copyright©1997-2008OpenSS7 Corp.
All Rights Reserved.
(See roff source for permission notice.)



Index

NAME
SYNOPSIS
DESCRIPTION
NOTICES
IOCTLS
FILES
DEVICES
SEE ALSO
VERSIONS
REFERENCES
TRADEMARKS
IDENTIFICATION

This document was created by man2html, using the manual pages.
Time: 14:25:11 GMT, December 20, 2008
OpenSS7
SS7 for the
Common Man
Home Top Index FirstPrev Next Last More Download Info FAQ Mail  Home -> Documentation -> Man Pages -> ISDN Stack -> ISDN Q.931
Last modified: Sun, 05 Mar 2006 08:34:16 GMT
© Copyright 1997-2007 OpenSS7 Corporation All Rights Reserved.