TFS 2574 is specifically designed for

use as a Line Input Transformer in

T1/CEPT applications.

It has been approved by MITEL for

use with their MH89760 and

MH89790 devices.

TFS2574 is available in five ver-

sions: - 0, -2, -3, -4 and -5 for 100,

120 and 75/120

Ω line impedances.

Also suitable as Input/Ouput trans-

former for other makes of T1/CEPT

interface devices.

Typical applications are:

•

PBX or computer to T1/CEPT

Digital Trunks.

•

High speed data link using

T1/CEPT Digital Trunk.

•

TDM Multiplexers.

•

ISDN Primary Rate.

Line Impedance:

T1 (MH89760)

100

Ω

CEPT(MH89790)

75

Ω

120

Ω

120

Ω

75/120

Ω

75

Ω

DCR (Ohms)

(1 - 8)

0.6

0.37

0.6

0.41

0.41

(3 - 6) & (4 - 5)

0.7

0.64

0.6

0.62

0.75

Inductance (mH)

(1 - 8)

> 2.2mH

> 1.07mH

> 1.5mH

> 1.20mH

> 0.8mH

(1 - 7)

> 1.9mH

Turns Ratio

(1 - 8):(3 - 6):(4 - 5)

1:1:1

1.25:1:1

1.25:1:1

1:1:1

1:1:1

(1 - 7):(1 - 8)

1.26:1

Dielectric Strength (V rms)

1500

1500

1500

1500

1500

Applicable documents:

Longitudinal Bal.

ANSI T1.408

yes

n/a

n/a

n/a

n/a

CCITT I.431

yes

yes

yes

yes

yes

Return Loss

ANSI T1.408

yes

n/a

n/a

n/a

n/a

CCITT G.703

yes

yes

yes

yes

yes

BT BS6328

n/a

n/a

n/a

n/a

yes

T1/CEPT

Input Transformer

TFS 2574

TFS2574 , -2 , -3 , -5

Hole arrangement

View in mounting direction

DIA 0.047"

DIA 0.060"

Filtran Limited

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

2-10

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

TFS2574-4

com 1

Line 75 8

120 7

3

device

6

1

Line

8

3

device

6

4

device

5

4

device

5

ELECTRIAL SPECIFICATIONS

TFS2574

-2

- 3

-4

-5

MECHANICAL

All dimensions

are in inches

TFS2574

T1

Intput Transformer

Through Hole

Standard ....................................................

2-10