more topics Multi-Function Module Feature

Description

The Multi-Function Module (MFM) is an optional adapter installed inside an MLX telephone and used for connecting tip/ring or external alert devices. The MFM operates on one of the two communications channels assigned to the telephone; therefore, calls can be made to and from the device independently of the telephone. The communications channel is also used for the Voice Announce feature. Because of this, when a call is active at both the MLX telephone and the MFM device, the Voice Announce feature cannot be used to reach the MLX telephone user. Conversely, if the Voice Announce feature is being used to reach the MLX telephone user, calls cannot be made from the device connected to the MFM. In addition, if the Voice Announce feature is being used at the same time that a call is received at the MFM extension number, the caller hears ringing, and the device rings if it can. But the call to the MFM extension number cannot be answered until one of the communications channels is free (the MLX telephone user hangs up or the person calling the MLX telephone user hangs up).

Although each MLX extension jack used to connect an MLX telephone is assigned only one logical ID, the system automatically assigns two extension numbers--one for the MLX telephone and one for the device connected to the MFM. Both extension numbers are assigned to the jack, whether or not an MFM is connected. Because a separate extension number is assigned, features and line/trunk access can be assigned to the MFM independently of the MLX telephone. See System Renumbering for details on specific extension numbers assigned.

The ringing patterns for devices connected to an MFM are similar to those of an MLX telephone for inside calls: two rings for outside calls; a ring and two beeps for priority ring or transfer return.

A switch on the MFM can be set for either of the following operations:

• Tip/ring interface
• Supplemental Alert Adapter (SAA)

Topics
	Description
	Tip/Ring Interface Supplemental Alert Adapter Programming Requirements
	At a Glance
	Considerations & Constraints
	Mode Differences
	Telephone Differences
	Feature Interactions