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Glossary
Glossary
AS Application Server. A logical entity serving a specific Routing Key. An example of an
AS is a virtual switch element handling all call processing for a unique range of PSTN
trunks, identified by an SS7 SIO/DPC/OPC/CIC_range. Another example is a virtual
database element, handling all HLR transactions for a particular SS7 DPC/OPC/
SCCP_SSN combination. The AS contains a set of one or more unique Application
Server Processes (ASPs), of which one or more is normally actively processing traffic.
Note that there is a 1:1 relationship between an AS and a Routing Key.
ASP Application Server Process. A process instance of an Application Server (AS). An ASP
serves as an active or backup process of an Application Server (for example, part of
a distributed virtual switch or database). Examples of ASPs are processes (or process
instances) of MGCs, IP SCPs or IP HLRs. An ASP contains an SCTP endpoint and may
be configured to process signaling traffic within more than one Application Server.
AIS Alarm Indication Signal
ANSI American National Standards Institute
BER Bit Error Rate
CCITT Consultative Committee on International Telegraphy and Telephony
CCS Common Channel Signaling
CIC Circuit Identification Code
CPU Central Processing Unit
DC Direct Current
DSC Digital Signaling Converter
DSR Data Set Ready
DTE Data Terminal Equipment
DTR Data Terminal Ready
FTP File Transfer Protocol
IETF Internet Engineering Task Force
IP Internet Protocol
ITU International Telecommunication Union
LIU Line Interface Unit
M2PA MTP 2 Peer to Peer Adaptation Layer
M3UA MTP3 User Adaptation Layer
MML Man-Machine Interface Language
MTP Message Transfer Part (of SS7 signaling)
PCM Pulse Code Modulation
PSU Power Supply Unit
RDC Remote Data Centre
SCTP Stream Control Transmission Protocol
SIGTRAN Signaling Transport
SS7 Signaling System Number 7
SSH Secure Shell
STP Signaling Transfer Point