NEC Univerge SV8100 System Hardware Manual page 237

UNIVERGE SV8100/SV8300
2.4
System Hardware Manual
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, between the chassis and telephones, comply with
the specifications listed in
page 3-18.
Select a place where devices that require an external power supply can
be easily connected 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.
The SV8300 system can be floor-mounted, wall-mounted, desk-mounted or
rack mounted. Plywood should first be installed on the wall where the chassis
will be positioned, to allow for secure anchoring. It is equipped with a bracket,
which can be used to secure each chassis in any of these installations.
Ensure that enough space is available to allow the installation of the additional
chassis above and below the Controlling Chassis.
Table 3-12 Cable Length of Terminals on
Issue 1.0
5 - 3