NEC ELECTRA ELITE IPK II, System Hardware Manual, Page: 91 / 642

Electra Elite IPK II Document Revision 3
System Hardware Manual 5 - 3
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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.
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Ensure that the cable length and line resistance (loop),
between the KSU and the telephones, comply with the
specifications listed in
Table 3-6 D
term
Series i or D
term
IP
Terminal Loop Resistance and Cable Length on page 3-22 and
Table 3-7 Electra Elite/D
term
Series E Multiline Terminal Loop
Resistance and Cable Length on page 3-23 .
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Select a place where devices that require an external power
supply can be easily connected to an AC outlet.
2.4 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” 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 (crossconnection wire) to the
terminal block (crossconnection 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. Refer
to
Figure 5-1 Typical Full MDF Layout .