AT&T System 85 manual 400

ISDN 7507 Display Terminal

Cords

Two cords are supplied with the 7507 display terminal: a coiled 9-foot modular handset cord and a line cord. An optional 12-foot handset cord is available.

Ringing

The 7507 display terminal has electronic tone ringing with patterns that can be selected by using the SELECT and CONFERENCE/RING buttons in sequence. The volume is controlled by the Volume arrow buttons.

Mounting Options

The 7507 display terminal comes equipped with a nonadjustable desk stand.

Color Options

The base of the 7507 display terminal is always black. The top of the 7507 display terminal 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 location—1900 feet

Terminating resistor in satellite closet—1600 feet

Power Requirements

The 7507 display terminal requires an auxiliary power supply. The power supply can be provided at a central location or may be collocated with the 7507 display terminal. If the auxiliary power supply fails or loses its power, the 7507 display terminal will provide basic voice service with the phantom power provided by the switch.

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