Mitel MIVOICE OFFICE 250, Руководство по установке и администрированию

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MiVoice Office 250 Installation and Administration Guide
242
1. Ensure that both ends of each station cable are labeled with the circuit number of the associated
station instrument.
2. Terminate each station cable on the
right
side of the corresponding station block. See Figure
14 on
page 234
for an example of the station block, and see Figure 20 below for an illustration
of the special DDM-16 termination cable, part number 813.1910. Also see Table 42 on page 242
for cable pinouts,
3. Using enough 25-pair cable to run from each block to each DEM-16 in the equipment chassis,
make the termination cables. Label each connector and cable end with the appropriate bay
number (for example, Bay2). These connectors will be attached to the DEM-16s after they are
installed.
4.
If necessary:
Using standard electrical tape, tape two ferrite split beads around each 25-pair
cable just below the Amphenol-type connector (as shown in Figure 19 on
page 157
).
5. Ferrite beads may be necessary to help reduce electromagnetic interference (EMI) and radio
frequency interference (RFI). The part number for a single split bead is 808.1195.
6. Terminate the other end of each 25-pair cable on the
left
side of the corresponding station block.
7.
Do not
attach bridging clips until the loop resistance tests have been performed, as described
on page 244 .
Figure 20: DDM-16 Termination Cable
Table 42: DDM-16 Termination Cable Pinout
To DDM-16 To MDF Signal Name Color Pair
1 1 Ring 1 BLU-WHT
25 26 Tip 1 WHT-BLU
2 2 Ring 2 ORN-WHT
26 27 Tip 2 WHT-ORN
4 3 Ring 3 GRN-WHT
28 28 Tip 3 WHT-GRN
5 4 Ring 4 BRN-WHT
29 29 Tip 4 WHT-BRN
7 5 Ring 5 GRY-WHT
31 30 Tip 5 WHT-GRY
To MDF
To DDM-16