NEC Aspire S, Manual

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Section 3: Installing Extensions and Trunks
Aspire S Hardware Manual Section 3: Installing Extensions and Trunks
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3
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.
Figure 3-1: INSTALLING A KEY TELEPHONE
625
Modular
Jack
25-pair
cable to
extension
PCB
BLK
YEL
RED GRN
BLU-WHT
WHT-BLU
Cross
Connect
Block
"B"
Block
0893100-92