AT&T System 85 manual Terminating Resistor, Mounting Options

ISDN 7505 Modular Terminal

Mounting Options

The 7505 comes equipped with a non-adjustable desk stand.

Color Options

The base of the 7505 is always black. The top of the 7505 is available in misty cream or black.

Distance Limitations

The maximum signaling distance from the port board to the work location jack based on DIW 24 AWG cable is:

Terminating resistor in work location1900 feet

Terminating resistor in satellite closet1600 feet

Power Requirements

The 7505 requires an auxiliary power supply. The power supply can be provided at a central location or may be collocated with the 7505. If the auxiliary power supply fails or loses its power, the 7505 will provide basic voice service with the phantom power provided by the switch.

Terminating Resistor

A 440A4 Terminating Resistor adapter is required with the 7505. The 440A4 can be located at the work location or in the satellite closet.

Power Failure Operation

The 7505 cannot be used as an emergency station during power failure transfer conditions.

FCC Registration

The 7505 modular terminal is not FCC registered.

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