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MERLIN LEGEND Communications System Release 5.0
System Manager’s Guide
555-650-118
Issue 1
June 1997
System Components
Page 3-34Adapters
3
Telephone Adapters 3
The adapters described below connect adjuncts to telephones.
Multi-Function Module 3
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 Lucent Technologies
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.
The MFM uses one of the two channels when it is active. A channel carries a
voice or data call between the system and the extension. This means you cannot
use Voice Announce and Speakerphone Paging when an adjunct (such as a fax
machine) and an MLX telephone are in use at the same time. When Voice
Announce is in use, a person calling an MFM extension gets a busy signal; a
person attempting to call out from an adjunct extension with an MFM does not get
a dial tone. Also, an adjunct connected by an MFM cannot provide a switchhook
flash.