Telephone Adapters; Multi-Function Module - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Adapters
Installation and operation of these adapters, as well as planning for them, is
handled by AT&T.

Telephone Adapters

The adapters described below connect adjuncts to telephones.

Multi-Function Module

The Multi-Function Module (MFM) enables you to connect tip/ring (T/R) or
supplemental alert adjuncts to an MLX telephone. The MFM is a circuit board
that mounts inside the telephone. Adjuncts plug into a modular jack on the
MFM. The MFM is the only T/R adapter used with MLX telephones. You cannot
install an MFM in an MLX-20L telephone that is set up for QCC operation.
!
WARNING:
Only a qualified technician can install or repair an MFM. To eliminate the
risk of electrical shock, do not disassemble the MLX telephone.
T/R adjuncts operate independently of the MLX telephone. If the telephone is in
use, the adjunct can send and receive voice or data calls. An MFM
accommodates the following T/R adjuncts:
Answering machines
Fax machines
Modems
Credit card verification terminals
Cordless telephones
Single-line touch-tone telephones
Supplemental alerts (bells, chimes, horns, and strobes)
The MFM is shipped with a power supply that supports one MFM and one DSS.
When you connect two DSSs to a telephone, ask your AT&T representative
about getting a different power supply. With either type of power unit, the total
cord length cannot exceed 50 feet (15 m) from the telephone.
The MFM supports only touch-tone dialing and does not detect pulse dialing.
You cannot transfer or conference calls from a device connected to an MFM or
use the Hold or Pickup features.
System Components
3–33