Installing Extensions; Key Extension Cabling; Installing A Key Telephone - NEC UX5000 Hardware Manual

S 3-6
ECTION

INSTALLING EXTENSIONS

3.6.1

Key Extension Cabling

Each key extension requires one-pair twisted station cable from the MDF to the modular jack. A maximum of
24 2-wire extensions can be installed per 50-pin block.
To connect key station cabling:
1. Punch down one pair 24 AWG station cable for each key telephone to a cross-connect block.
2. Run one-pair cross-connect from the cross-connect block to the extension (B) block for each extension.
3. Connect the extension (B) block's 25-pair cable to the corresponding RJ-61 connector on the PCB.
4. Install bridging clips on the extension (B) block.
3.6.2

Installing a Key Telephone

1. Install a modular jack for each extension. The modular jack should be within six feet of the phone.
2. For each extension, run one-pair 24 AWG station cable from the cross-connect block to a modular jack.
Ground the unused pair.
3. Terminate the extension leads to GRN/RED of the modular jack. Terminate the unused leads to the jack.
Chapter 3
Chapter 3 - Installing Extensions and Trunks
3 - 7