AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 46

Control Unit
Jacks for Digital/ISDN
(MLX) Telephones
Use the instructions in the Data Guide
to plan connections for digital data
equipment.
The system assigns individual extension numbers to each of the jacks for either
the Voice Announce to Busy or the Simultaneous Voice and Data feature. The
extension number associated with the first (odd-numbered) station jack in the
pair is the telephone's extension number. Calls cannot be placed to the
extension number associated with the even-numbered station jack.
You can assign either of these features to any of the analog multiline telephones
in the system, but you cannot assign both to the same telephone.
Planning Form Instructions
On Form 2a, mark the pairs of jacks for analog multiline telephones that have
the Voice Announce to Busy or Simultaneous Vioce and Data feature.
1 . In the "Logical ID" column, draw a box around the pair of station jack
numbers that you plan to assign to each analog multiline station with
either feature.
2 . In the "Person, Location, or Function" column, next to the first (odd)
number of each boxed pair, identify the station by person or location.
3 .
In the "Person, Location, or Function" column, next to the second (even)
number of each boxed pair, write "voice/voice" for the Voice Announce to
Busy feature or "voice/data" for the Simultaneous Voice and Data feature.
Use these only if the system has non-operator
instructions
to assign to digital station jacks on 008
Although only one logical ID is assigned to each digital station jack, the system
assigns two extension numbers. The extension number on Form 2a is the
extension number automatically assigned to an MLX telephone connected to the
digital station jack. The second extension number is reserved for an adjunct
such as an answering machine that may be connected to the MLX telephone via
a Multi-Function Module (MFM) or for an ISDN 7500B Data Module used to
connect a data terminal.
The system automatically assigns both extension numbers whether or not the
station includes an MFM or data module. Calls can be placed to both extension
numbers independently.
The MFM can operate as either a Supplemental Alert Adapter (SAA) or as a
tip/ring interface. The adapter is used when the MFM connects an external alert
such as a bell or horn. The tip/ring interface is used when the MFM connects a
tip/ring device such as an answering machine or modem.
telephones
MLX
modules.
MLX
System Numbering 2-17