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CAUTION

•

Install or remove modules from the shelf only when the power is off.
If you install a module in the shelf with the power on, the internal

circuitry may suffer damage and the product warranty will be void.

•

Remove and install circuit boards only in a static-safe environment
(use antistatic wrist straps, smocks, footwear, etc.).

•

Keep circuit boards in their antistatic bags when they are not in use.

•

Do not ship or store circuit boards near strong electrostatic, electromag-
netic, magnetic, or radioactive fields.

•

For more complete information on electrostatic discharge safety
precautions, refer to Bellcore

TM

 Technical Reference # TR-NWT-000870.

Copyright 1998 by Dantel, Inc. • Dantel is a registered trademark of Dantel, Inc. • ISO 9001 Registered

Printed in the U.S.A.

I

NSTALLATION

 & O

PERATION

 M

ANUAL

44443-1098 <90-00059>

44443 F

OUR

-W

IRE

T

ERMINATION

 S

ET

About this Practice:

This document has been reissued to:
• Renumber figures.

Issue date:  October 1998

Reissued Practices:

Updated and

new content can be identified by a
banner in the right margin.

UPDATED

Table of Contents

Ordering Information ...........................................................................  2
General Description..............................................................................  2
Circuit Description ...............................................................................  2
Application Information .......................................................................  6
Installation............................................................................................  7
Operation ............................................................................................  11
FCC Required Information ................................................................  12
Technical Specifications .....................................................................  13
Warranty .............................................................................................  14

44443-XX

TERM SET

A11-44443-00

RCV ATTEN (dB)

OUT  IN OUT  IN

4 WIRE LINE

XMT

RCV

2 WIRE DROP

XMT

RCV

XMT ATTEN (dB)

OUT  IN OUT  IN

.125

.25

.5

1

2

4

81

6

.125

.25

.5

1

2

4

8

16

Содержание 44443

Страница 1: ...Technical Reference TR NWT 000870 Copyright 1998 by Dantel Inc Dantel is a registered trademark of Dantel Inc ISO 9001 Registered Printed in the U S A INSTALLATION OPERATION MANUAL 44443 1098 90 00059...

Страница 2: ...et applications The 44443 Term Set is a plug in printed circuit module that fits into any 400 type or similiar equipment housing The 44443 00 is a passive device which requires no supply voltage The 4...

Страница 3: ...3 S3 1 S3 4 S3 5 S3 6 T GND T R J2 4W RCV 5 4 3 1 2 4 WIRE RECEIVE OUT 6 COM 1 IN 5 600 900 10 12 600 900 7 9 11 S1C S1A 8 T1 900 600 S2C 1 6 2 3 4 5 600 900 19 27 T2 900 600 S2A 600 900 S2B 7 9 11 12...

Страница 4: ...The voice signal at the secondary of T2 is attenuated by a 600 ohm switchable pad and applied to pins 55 and 49 at the 4 wire XMT port Receive Mode In the receive mode a voice frequency entering pins...

Страница 5: ...inates the need for a resistive voltage drop for 24 or 48 VDC supplies Idle Line Termination Circuit When K1 is energized the normally closed side of K1A opens and the 600 ohm ILT branch is disconnect...

Страница 6: ...NEJACK PABX LINE STATION SELECTOR 49018 DTMF DECODER 44020 BUSY TONE GENERATOR J3 TIP RING REVERSED SWITCH DROP LINE Fig 2 shows a 44443 Term Set as part of a 00331 DTSS3ON Order Wire PABX Interface T...

Страница 7: ...Strap Options Set the switches and straps using Fig 3 and Table A FIG 3 44443 TERM SET SWITCH AND STRAP LOCATIONS 44443 XX TERM SET A11 44443 00 RCV ATTEN dB OUT IN OUT IN 4 WIRE LINE XMT RCV 2 WIRE...

Страница 8: ...to ILT ILT Bypass IN Load Strap to ES ILT Bypass IN Load Strap to OUT Wiring Normally the 44443 is used in a shelf that is pre wired at the factory Fig 4 shows the edge connector pin designations if...

Страница 9: ...15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CIRCUIT SIDE OF PC BOARD COMPONENT SIDE OF PC BOARD 4W XMT D Lead 4W XMT 2W R B Lead A Lead 2W T Ground ILT Relay Positive Input 01 only G Lead ILT Relay Negative...

Страница 10: ...dBmO Measure minimum tone level Adjust S3 1 thru S3 6 for minimum level ACTION Remove Term Set and insert extender card in its place Insert Term Set into extender card When aligning 01 energize ILT r...

Страница 11: ...cts to the output of the Term Set Echo Suppression Override Idle Line Termination Applications The 44443 01 features a relay activated echo suppression branch across the 4 wire XMT port This circuit i...

Страница 12: ...cturer s authorized agent 5 When the installation of this device requires connection or changes to the internal wiring of registered telephones or other registered devices such changes and connections...

Страница 13: ...Dissipation during relay operation 01 option only Physical Dimensions Weight 00 01 Operating Temperature Range VALUE 600 or 900 ohm in series with 2 15 uFd capacitor 600 ohm 5 4 5 dB nominal mid range...

Страница 14: ...n instrument signed by a duly authorized officer of the Seller and accepted by the Buyer Warranty and remedies on products not manufactured by the Seller are in accordance with warranty of the respect...

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