Selecting A Permanent Mdf Location; Selecting A Site For Installing The Telephones; Constructing The Main Distribution Frame (Mdf) - NEC Univerge SV8100 System Hardware Manual

UNIVERGE SV8100
2.4
System Hardware Manual
Connect the chassis to a dedicated AC receptacle that is not

being used for any other device.
2.3.2

Selecting a Permanent MDF Location

When selecting a permanent site for the MDF, the technician may
encounter some of the following conditions:
Limited space is available but must be used.

The available space may pose one or more environmental

hazards.
The proposed location has limitations such as insufficient

lighting or the lack of a suitable ground for the chassis.
The technician that encounters these conditions must provide

the best possible solution for installing the equipment. This
document cannot cover all possible situations, precautions,
and actions.
2.3.3

Selecting a Site for Installing the Telephones

When a site is being selected for telephone installation, consider the
following conditions to ensure proper installation:
Ensure cable length and line resistance (loop), between the

chassis and telephones, comply with the specifications listed in
Table 2-17 D
and Cable Length on page
Select a place where devices that require an external power

supply can be connected easily to an AC outlet.

Constructing the Main Distribution Frame (MDF)

The Main Distribution Frame (MDF) has two different standard quick-connect
terminal blocks that are mounted on a 3/4-inch plywood backboard. Mounting
these blocks on standoffs for ease of access is recommended. The
recommended blocks are 66B50 for termination of the MDF Cable Assembly
and 66M50 for termination of the station cables.
The Intermediate Distribution Frame (IDF) requires the 66M50 blocks only.
Both the MDF and the IDF use standard bridging clips for each terminal block.
The bridging clips mate the left half of the terminal block (terminated cable
run) to the right half of the terminal block (cross connection wire) to the
terminal block (cross connection wire). The bridging clips are also useful
during troubleshooting to help isolate the cable runs and terminals/telephones
from the central equipment and the Central Office Network from the system.
term term
Series i or D IP Terminal Loop Resistance
2-28.
Issue 2.0
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