xvi About this document
297-2521-106 Standard 23.01 March 2001
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Chapter 4, “Message structure and functions,” defines the purpose of
each of the mandatory information elements and other information
elements of messages; describes messages supported for PRI call
processing and their role in call processing. Included are detailed
definitions of Q.931 and Q.932 messages’ information elements
• Chapter 5, “Call control procedures,” describes the call control
procedures used to set up and take down PRI calls, including user or
network parameters.
• Chapter 6, “PRI interworking,” lists the interworking of PRI to various
agents, and describes enhanced digital recorded announcements and PRI
to ISUP interworking.
• Chapter 7, “Feature interaction,” describes the services and features
supported on the PRI interface, including RLP/ATP and Fraud Call
Interrupt.
• Chapter 8, “Dialable Wideband Service,” describes how Dialable
Wideband Service works, including hardware, translation and routing,
and datafilling.
• Chapter 9, “Datafill and subscription parameters,” provides information
on database correlation and describes interdependencies of tables and
datafill order; describes subscription parameter relationships, including
facility, service, and integrated access parameters.
• Chapter 10, “Service verification,” outlines the verification of the
various services and describes steps that guarantee services function
properly and steps to isolate problems.
• Chapter 11, “Engineering recommendations,” provides recommendations
to simplify the configuration and engineering of the ISDN digital trunk
controller PRI.
• Chapter 12, “DS-1 to DS-30 channel mapping,” provides tables that
show mapping of the DS-1 channel to the DS-30.
• Chapter 13, “ETSI PRI,” describes the differences between North
American PRI and European PRI functionality.
• Chapter 14, “NCAUUI” (Non Call Associated User to User
Information), describes the service that provides PRI users at the same
switch with user–to–user communication.
• Chapter 15, “NCAUUI (Two switch scenario),” provides a two switch
scenario of the activated NCAUUI feature.
• Chapter 16, “PRI Connected Number Transport,” describes the flow of
PRI Connected Number Transport across the network.
• Chapter 17, “PRI Progress Indicator Transport,” outlines the purpose of
the progress indicator and maps its location in relation to the originating
switch.
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