Install the MSP-1 Power Supply

5.Place the adhesive side on the top of the MSP-1 and press the strip down so it adheres to the surface. Do not place the strip on the bottom of the power supply where the rubber feet are located.

6.Carefully align the fastener surface on the top of the power supply with the fastener surface on the wall or desk and press the two surfaces together firmly.

Connect the Power Supply

One power supply will support one telephone with or without an adjunct.

The maximum loop range between the telephone and the power supply is 250 feet (76 meters).

The power output is provided through 3 modular jacks on the power supply. These jacks are labelled as shown:

PHONE

-7 +8

OTHER

-2 +5

LINE

The - and + numbers refer to the pins on which power is present and the polarity of that power.

The PHONE and LINE jacks are 8-pin female non-keyed 657-type jacks that can accept D4, D6, and D8 modular plug cables. The OTHER jack is a 6-pin female non-keyed 657-type jack.

The powering arrangements shown in the following figures can be used with the MSP-1 Power Supply.

Figure 9-15shows the local powering arrangement for Integrated Services Digital Network (ISDN) telephones, the Digital Communications Protocol (DCP) 7444 telephone voice frequency (VF) display, 84xx telephones, and adjuncts connected to all telephones except the 8102.

Figure 9-16shows the local powering arrangement for adjuncts connected to the 8102 telephone.

The type of cord(s) needed to make these connections are designated in each figure.

Issue 1 September 1995 9-37

Page 167
Image 167
AT&T 555-230-894 manual Connect the Power Supply, Phone Other Line