Installing Extensions; Key Extension Cabling (Figure 3-1); To Connect Key Station Cabling; Installing A Key Telephone (Figure 3-1) - NEC Aspire S Manual

INSTALLING EXTENSIONS

Key Extension Cabling (Figure 3-1)

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.

Installing a Key Telephone (Figure 3-1)

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.
Aspire S Hardware Manual
Section 3: Installing Extensions and Trunks
YEL
BLU-WHT
RED
Figure 3-1: INSTALLING A KEY TELEPHONE
Section 3: Installing Extensions and Trunks ◆ 3-3
BLK
WHT-BLU
Cross "B"
GRN
Connect Block
Block
3