Vodavi Starplus DHS, Техническое руководство

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DHS-E Installation 3-21
The cable is then routed out of the KSU through an opening at the lower left of the KSU
housing. A cable restraint clamp is provided and may be used to secure cables exiting the
KSU. The 25-pair cable is then terminated on a punch-down terminal block on the MDF
(refer to
Table 3-12 ).
The 3 x 8 module is installed to expand system capacity and is housed in the KSU in
stacking fashion over the initial two 3 x 8 modules. Four additional 3 x 8 modules can be
installed in the KSU. The 3 x 8 module is shipped with four stand-off mounting posts.
Follow these steps when installing a 3 x 8 module:
1. Be sure that KSU power is turned OFF, and the KSU cover is removed.
2. Connect grounded wrist strap to a suitable earth ground.
3. Locate the screws used to secure the 3 x 8 module.
4. Remove one of the module-securing screws only (so the existing board stays in place,
and retain the screw for later use).
5. Insert one of the stand-off posts into the screw position where the screw from Step 5
was removed.
6. Tighten securely by hand, then finish tightening with a small hand tool. It is very
important not to over-tighten any screw or stand-off post as damage to the board
may occur.
7. Repeat Steps 4 through 6, until all module screws are replaced with stand-off posts.
8. Position the new 3 x 8 module over the stand-off posts installed and use the screws
removed in the previous steps to secure it in place on the stand-off posts.
9. Once mounted, carefully insert the bus ribbon cable into the next available bus
connector on the CPU board.
10. Connect the amphenol-ended cable to the connector on the 3 x 8 module.
11. Secure the cable in place with a clamp or cable tie.
12. Replace KSU cover and secure with cover screws, and restore KSU power when all
wiring is complete. Or continue with the installation process.
System power should be OFF before plugging in the station cable or while working on the
station punch-down block. (Although each port is over-current protected, unnecessary
shorting should be avoided).