Welltech Dialogic SS7 Protocols ISUP - Manual (Page 9)

Dialogic ® SS7 Protocols ISUP Programmer's Manual Issue 15
9
About this Publication
1.1 Introduction
The ISUP module is a software implementation of the Signalling System
Number 7, ISDN User Part (ISUP). In addition to supporting major ISUP
variants such as ITU-T recommendations Q.761-Q.764, Q.767, ETSI standard
ETS 300 356-1, and ANSI T1.113 the ISUP module supports national variants
including German ISUP and Japanese TTC ISUP. It is also possible for the
user to customize existing variants by adding or deleting parameters. The
ISUP module supports, as a purchasable option, the BICC (Bearer
Independent Call Control) protocol which is treated as a variant in its own
right.
This document is the Programmer's Manual for the ISUP module. It is
intended for use by users developing their own application programs that will
interface with and use the functionality provided by the ISUP module.
The module uses the services provided by the Message Transfer Part (MTP) to
exchange signaling messages with remote signaling points. It supports a
number of both-way telephony circuits. The circuits can be divided into a
number of circuit groups; each group may be assigned different attributes
allowing the user considerable flexibility in the configuration of the module.
The ISUP module is event driven and uses standard structured messages for
inter-process communication. It is intended to be used in conjunction with
the MTP module either on hardware platforms or on user supplied hardware.
However, the software is portable and the well-defined message structure
and the independent nature of the module allows ISUP to be used with
alternative MTP implementations if required.
This manual gives an overview of the internal operation of the ISUP module
and defines the structure of all messages that can be sent to, or issued by,
the module. It also describes all the configuration parameters. Appendix B
on page 183 lists the ITU-T ISUP and the ANSI T1.113 ISUP messages and
parameters that are currently supported by the module.
1.2 Abbreviations
ANSI American National Standards Institute
BICC Bearer Independent Call Control
CIC Circuit Identification Code
DPC Destination Point Code
ISDN Integrated Services Digital Network
ISUP ISDN User Part
ITU International Telecommunication Union
MTP Message Transfer Part
OPC Originating Point Code
SS7 Signalling System Number 7