255-700-025
3-37
PacketStar
™
Access Concentrator 60 User Guide
, Issue 1
Release 6.3.0
Chapter 3 System Features
AC 60 Software Features
allows on-demand allocation of bandwidth and connection resources. The
signaling protocol supports the following basic functions at the UNI interface:
Call States
Call states exist on both the user side and the network side of the transaction.
Call states define which messages can be accepted by the user or the network
entity, and how they are expected to react to those messages. As the user or
network entity moves from call state to call state, the call switching process is
accomplished.
In cases where the calling party is the user, and the called party is across the
network, the UNI at the Access Concentrator port presents a user-side
interface (UNI) to the user. The Access Concentrator port receives these user-
side messages from the user and based on resource availability, route
determination, and other network factors, presents a network-side (NNI or
IISP) interface to the called party or the network-side Access Concentrator
Feature
Description
Connection/Call Setup
Origination/establishment of a call.
Connection/Call Request
Request of resources for connectivity to a
certain destination. The Information Ele-
ment (IE) field contains resource informa-
tion, that is, PCR, SCR, MBS, QoS class,
and so on.
Connection/Call Answer
Allows the destination party to respond to a
request with VPI/VCI and other informa-
tion related to the connection/call.
Connection/Call Clearing
Provides the information associated for
removing the call/connection request. This
includes: 1) calls removed because there
weren’t enough resources to meet the call
request, or 2) connections removed due to
call disconnect requests from either party,
or 3) calls removed due to link and other
network failures.
Reason for Clearing
Allows the clearing party to indicate the
cause for initiating its removal from a con-
nection/call.
Содержание PacketStar AC 60
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