3Com CommWorks 5210, User Manual

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C
G
LOSSARY
This appendix lists acronyms and terminology used in the CommWorks VoIP
application.
A-Link Access link. SS7 Signaling link used to connect the Signaling Transfer Point (STP)
and Signaling Switch Point (SSP).
ACF Admission Confirm—This is a call flow message.
AMI Alternate Mark Inversion—A line encoding scheme for transmitting data bits over
T1 and E1transmission systems.
ANI Automatic Number Identification—The billing number of the person making the
phone call. ANI allows the calling party to be billed without having to enter a PIN.
ARJ Admission Reject—This is a call flow message.
ARQ Admission Request—This is a call flow message.
AIS Alarm Indication Signal—Formerly referred to as a ‘blue alarm’ or ‘blue signal’.
This is a signal that is created when a maintenance alarm indication has been
activated. This signal is transmitted downstream informing that an upstream
failure has been detected.
AS Autonomous System—An independent system.
AUX Auxiliary—Backup or acting as a redundancy on the system.
B8ZS Binary Eight Zero Code Suppression—Line-code type, used on T1 and E1 circuits. A
special code replaces any eight consecutive zeros that are sent over the link. This
code is then interpreted at the remote end of the connection. This technique
guarantees ones density independent of the data stream. Sometimes this is
referred to as bipolar 8-zero substitution.
BHCA Busy Hour Call Attempts—The number of calls attempted within 60 minutes
during the busiest times during the day.
CC Country Code—When calling outside of the country, the called number consists of
the country code, identifying the country where the person to be called resides
and a NSN (National Significant Number). The code of the country is the first three
digits dialed.
CCS Common Channel Signal—This is a Bellcore definition: A network architecture
which uses Signalling System 7 (SS7) protocol for the exchange of information
between telecommunications nodes and networks on an out-of-band basis.