AT&T 3.0 manual Installing Telephones and Adjuncts

Connecting Telephones to the Control Unit

■If an MLX telephone or analog multiline telephone is in a different building from the control unit, and is within 1000 ft. (305 m) of the control unit, connect the telephone to the control unit, using two ln- Range Out-of-Building (lROB) protectors.

Make sure you use an MLX-specific lROB protector for an MLX telephone, and an analog multiline-specific IROB protector for an analog multiline telephone.

See the documentation packaged with the IROB protector for complete installation instructions.

■If the single-line or T/R telephone is 1000 ft. (305 m) or further from the control unit, connect the telephone to the control unit using an Off- Premises Range Extender (OPRE).

See the documentation packaged with the OPRE for complete installation instructions.

CAUTION:

Take extreme care to make sure that you connect MLX phones only to MLX modules; a mismatch could damage the ports and cause them to stop functioning.

Incorrect wiring can result in users not being ah/e to place outgoing calls. Make sure you use the proper cord. For all GS/LS modules:

Use a D2R cable from an RJ11 jack.

Do not use the Brand-Rex Quad cab/e from an E66 block.

If you cannot avoid using the Brand-Rex Quad cable, reverse the tip and ring leads at the E66 block to correct the mismatch.

To avoid introducing power supply noise into system wiring, allow at least 3 in. (7.62 cm) of clearance between the basic carrier’s power supply and any wiring or termination hardware located to the left of the control unit.

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