AT&T MERLIN LEGEND Communications System Release 2.0 Maintenance And Troubleshooting Manual page 203

Glossary
adjunct
Optional equipment used with the communications system such as an alerting
device that connects to a multiline telephone or to a telephone jack.
alternate mark inversion (AMI)
A line coding format in which a binary 1 is represented by a positive or
negative pulse, a binary 0 is represented by no line signal, and subsequent
binary 1's must alternate in polarity or there will be a bipolar violation. AMI is
used in the DS1 interface.
ANI
automatic number identification
ARS
Automatic Route Selection
ASCAP
American Society of Composers, Artists, and Producers
automatic number identification (ANI)
The process of automatically identifying a caller's billing number and
transmitting that number from the caller's local central office (CO) to another
point on or off the public network.
Glossary
GL-1