Adjuncts; Adapters - AT&T MERLIN LEGEND Installation & Maintenance Manual

System Description

Adjuncts

Adjuncts are pieces of equipment that connect directly to the CU
or to a telephone through an adapter (see "Adapters" below).
Answering machines, credit card verification terminals, and
external alerts are examples of adjuncts. For more information on
adjuncts, see Appendix B.

Adapters

Adapters enable a proper connection of equipment or, in the
case of the channel service unit (CSU), of a DS1 facility to the
CSU. Some adapters connect directly to the CU (system
adapters) while others connect to telephones (telephone
adapters). See Chapters 3 and 6 for the installation procedures
for these adapters:
system adapters
ESF T1 CSU
551 T1 L1 CSU
Universal Paging Access Module (UPAM)
telephone adapters
Multi-Function Module (MFM) for digital telephones
General Purpose Adapter (GPA) for analog telephones
ISDN 7500B Data Module for connecting digital data
equipment either directly to the CU or to an MLX
telephone (for simultaneous voice and data transmission)
modem for connecting digital equipment, such as a
personal computer (PC), to a tip/ring (T/R) interface
Supplemental Alert Adapter (SAA) for connecting alerts
(such as horns or strobes) to an analog multiline telephone
1-34 Adjuncts and Adapters