Cabinet To Block Connection - Toshiba VP 300 Installation Instructions Manual

3-34 Installation and Maintenance Manual
Wiring
Toshiba VP Systems Release 7.1 July, 1994
In most cases, the existing wiring is not consistent as to placement of the
connections. In order to isolate faults quickly, it is recommended that the slots
be connected in numerical order, allowing for known or anticipated expansion.
At least, be sure that the slot and port number can be translated to an extension
number that is meaningful to the servicing technician.
For example, a 16-port system requires one connector block and four 25-pair
cables. From the rear of the cabinet, connect the first 25-pair cable from P1 to
jack position 1 of the 66M4-4W connector block, or column A; connect the
second 25-pair cable from P2 to jack position 2, or column B; etc. Refer to
Figure 3-9.
P6 P1
VP 300
Rear View
Figure 3-9 Cabinet to Block Connection
For maximum configuration, three connector blocks and six 25-pair cables are
required.
The actual wiring (cross-connecting from the 66M4-4W connector block to the
66M block, or equivalent), can be made in any manner consistent with good
telephony practice. There are two guidelines to follow when punching down
wires to ensure correct installation:
•
Do not touch the pins on the connector block with your fingers or with dirty
tools. The pins may oxidize and "go open" after a few months.
•
Tip is always above Ring on the block when a pair is punched down. Refer
to Table 3-8.
66M4-4W
66M4-4W