NEC nd-20292 manual NECAmerica Inc. Switchinq Terminals Division

NECAmerica Inc. Switchinq Terminals Division

CONNECTION OF TA-20 or S-l 1 HANDSET AMPLIFIER TO A Dterm II (ETE-1-2)

Dterm II

ETI NUMBER: DS-004 DATE: APRIL, 1990

1.DESCRIPTION

This Engineering Technical Information (ETI) Bulletin provides installation instructions for connecting a TA-20 or 5-l 1 Handset Amplifier to a Dterm II telephone (ETE-l-2). ..

2.LIMITATIONS NONE

3.PARTS REQUIRED

3.1Dterm II (ETE-l-2).

3.2TA-20 or S-l 1 Handset Amplifier

3.3Double sided insulation tape.

4.REFERENCES NONE

5.OPERATION

5.1Adjust the desired volume level via the rotary switch on the TA-20 or S-l 1 handset amplifier.

6.PROCEDURE

6.1Disconnect the line and handset cord from the Dterm Telephone.

6.2Place the Dterm II upside down on a clean flat work surface.

6.3Slide the Directory out and place it aside.

6.4Remove the access panel by applying pressure (at the notch of the panel) and slide the access panel out as shown in Figure 1.

6.5Cut strap 58 on the telephone PC8 as shown in Figures 2 and 3 (Revision A), and Figures 4 and 5 (Revision B or higher). (Strap 58 is visible from the access panel window.)

NOTE:

If the

revision

for

the

ETE-1-2 telephone

is A (e.g., 294

A) proceed

to step

6.6

(TA-20)

or 6.7 (S-l 1)

If the

revision

for

the

ETE-1-2 telephone

is B or higher

proceed

to

step

6.8

or

6.9

The revision

level

of an ETE-l-2 telephone can be determined

from

the

label

on

the

bottom

housing

of the

telephone.

Example:

If the Lot No. on

the label is 295A, the revision

level

of

that

particular

telephone

is A.

6.6For ETE-l-2 Revision A. Connect the leads from the TA-20 Handset Am.plifier to the spade lug connectors on the ETE-l-2 PCB. Refer to Table - 1 and Figure 2. Needlenose pliers may be used to push spade lugs into their receptacles.

6.7For ETE-1-2 Revision A. Connect the leads from the S-l 1 Handset Amplifier to the spade lug connectors on the ETE-l-2 PCB. Refer to Table - 2 and Figure 3. Needlenose pliers may be used to push spade lugs into their receptacles.

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