# 4 SS7 Call Control for ISUP

Purpose

This chapter describes Dialogic support of Integrated Services Digital Network User Part (ISUP). The chapter includes information on several of the commonly used ISUP messages and provides details about ISUP segmentation and outgoing and incoming setup.

More Information

See the Appendix at the end of this book for tables of ISUP-supported messages, Field IDs for supported fields and restrictions on the implementation of ISUP messages.

In this section:

ISUP Introduction

ISUP Incoming Call Setup

ISUP Outgoing Call Setup

CIC Start-up Procedure

ISUP Segmentation

ISUP Continuity Check

ITU ISUP Continuity

ANSI ISUP Continuity

Circuit Status Query

Circuit Validation Test and Response

Call Modification Messages

SS7 CIC Blocking Procedures

CRM/CRA (ANSI)

MCP/PCP (ITU)

MPM/CCL/OPR

Suspend/Resume

UPT/UPA (ITU)

SS7 Customization with ISUP Messages

Modifying the Format of an ISUP Message

Important ISUP PPL Information

Overlap Call Digit Collection

Automatic Congestion Control

State Syncing on PPL Event Request for ANM

ISDN. Network architecture based on digital transmission, switching, and common channel signaling. Basic configurations include 2B+D called a Basic Rate Interface, and 23+D called a Primary Rate Interface. Outside North America, PRI is 30B+D.
See Integrated Services Digital Network User Part.