Instruction manual

The Control Unit
1-5
Introduction
024 TDL Module 1
The 024 TDL module contains 24 extension ports for connection to the 4400-
Series telephones. The module has potential operator positions at the first, fifth,
thirteenth, and seventeenth ports. If the 024 TDL module is in Slot 1, you can
connect a 4424LD+ telephone to the first extension port and use that telephone
as the system programming console. This module can fit into both metal and
plastic carriers.
Only a 4424D+ or 4424LD+ telephone can be connected to an eligible
operator position port assigned as a Direct-Line Console (DLC)
operator position; only a 4424LD+ telephone can be connected to an
eligible operator position port assigned as a Queued Call Console
(QCC) operator position. If an invalid type of telephone (for example,
a 4400, 4400D, 4406D+, or 4412D+) is plugged into a port assigned
as an operator position, the system programming console displays a
message indicating that the 4400-Series telephone is invalid. If the
programming console has a Direct Station Selector (DSS) connected,
the LED associated with the invalid telephone type turns on and
remains on until a valid type of telephone is connected to the port.
As with MLX modules, the slot/port numbering for adjunct ports on
412 LS-ID-TDL modules begins at 21. The slot/port numbering for
adjunct ports on a 024-TDL module begins at 25. For example, on a
412 LS-ID-TDL module in slot 1 of the carrier, to access adjunct port
710, you would enter 0121 as the slot/port number (01 indicates slot
1 on the carrier). On a 024-TDL module in slot 1 of the carrier, to
access adjunct port 710, you would enter 0125.