Lucent Technologies SLC ConnectReach User & Service Manual page 519

Glossary
10Base-T — A widely used standard for Ethernet networks and T1 services using twisted-pair wiring as
the physical medium.
A
Address Digits — The digits that specify the destination (or source) of a call, such as dial tone
multifrequency (DTMF), multifrequency (MF), and pulse.
AIS — Alarm Indication Signal. Sometimes called a blue alarm or blue signal. In T1, the AIS indicates to
the far end of the line that the near end has detected a transmission fault at the far end. The AIS sends
ones in all bits of all time slots.
AMI — Alternate Mark Inversion. Digital transmission requires that each consecutive pulse be transmitted
at opposite polarity or voltage.
ANI — Automatic Number Identification. Imbedded in the phone call is a series of digits that tell you the
phone number of the phone calling you. This identification could be used to search a database for
customer information.
Answer Supervision — A means by which a private branch exchange (PBX) tells a central office (CO)
that an incoming call has been answered.
AOR — Addressable Office Repeater.
ARP — Address Resolution Protocol. A basic level protocol within the transport control protocol/Internet
protocol (TCP/IP) group that "maps" IP addresses to Ethernet addresses.
ATM — Asynchronous Transfer Mode. A high-speed connection-oriented multiplexing and switching
method utilizing fixed-length cells to support multiple types of traffic. It is asynchronous in the sense that it
is not time dependent.
GL-1
Issue 4 June 2002