TEW4980-4 데이터 시트보기 (PDF) - Filtran LTD

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TEW4980-4

CEPT/T1 In/Output Transformer

Filtran LTD 

CEPT/T1

In/Output Transformer

TEW4980

TEW4980 is designed to be used either as a

transmit or a receive transformer in the ISDN

primary access network, interfacing SIEMENS

PEB2235 and PEB2236 to a 75, 100 or 120

ohm line.

When in transmit mode, connect the two primary

windings in parallel, pin 1 to 3 and pin 2 to 4.

When in receive mode, connect the two primary

windings in series, pin 2 to pin 3, thus forming a

center tap at pin 2/3.

Typical applications are:

• Primary rate ISDN network nodes.

• PBX or computer to T1/CEPT Digital trunks.

• TDM Multiplexers.

Certified to EN60950 & EN41003

MECHANICAL

5

1

2

3

8

4

TEW4980-1, -2, & -3

WHITE DOT

AT PIN 1

AlLL DIMENSIONS

ARE IN INCHES

Com 5

1

2

75 Ω 7

3

120 Ω 8

4

TEW4980-4

ELECTRICAL SPECIFICATION

Line Impedance

Inductance (mH)

(5-8)

Turns ratio

(1- 2):(3-4):(5-8)

(1- 2):(3-4):(5-7)

Pulse Mask

Longitud. bal.

Return Loss

Dielectric Strength, (Vrms)

TEW4980 -1

75 Ω

> 0.75

1:1: 1.57

-2

100 Ω

> 3.5

1:1: 2.67

CEPT

I.431

G.703

4000

T1/DS1

T1.408

T1.408

4000

-3

120 Ω

> 1.2

1:1: 2

CEPT

I.431

G.703

4000

-4

75/120 Ω

> 1.2

1:1:2

1:1:1.6

CEPT

I.431

G.703

4000

Filtran Limited

229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3,

Tel : (613) 226-1626 Fax : (613) 226-7124

2-21

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