Справочник Пользователя для AT&T System 85

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The terminating resistor jumpers must be set 

only by qualified service personnel.

d

The terminating resistor jumpers must be set to OFF when the set is in a point-to-point

configuration and the terminating resistor is in the closet or a 440A4 is connected on the

line.

d

The terminating resistor jumpers must be set to ON when the set is in a point-to-point

configuration and the terminating resistor is 

not in the closet or a 440A4 is not connected

to the line.

d

The terminating resistor jumpers must be set to OFF when the set is in a multipoint confi-

guration and the terminating resistor is in the closet, a 440A4 is connected on the line, or

the jumper is set to ON in one of the other sets on the line.

d

The terminating resistor jumpers must be set to ON when the set is in a multipoint confi-

guration and the terminating resistor is 

not in the closet, a 440A4 is  not connected on the

line, or the jumper is not set to ON in any of the other sets on the line.

The 8503T voice terminal should be administered as an ISDN 7505 voice terminal.

The three call appearance/feature buttons can be used for call appearances or

features, but, for most effective use of the voice terminal, it is strongly suggested

that all three buttons be administered for call appearances.

The 8503T voice terminal cannot be used as an emergency station during power failure transfer

conditions.

The 8503T voice terminal is FCC registered.

This voice terminal is compatible with the inductively coupled hearing aids prescribed by the FCC.