T1/CEPT
TFS2574
T1
Intput Transformer
Input Transformer
Through Hole
TFS 2574
2-10
Standard ....................................................
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 75/120Ω 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.
MECHANICAL
TFS2574-4
3
device
com 1
6
Line 75 8
120 7
4
device
5
Hole arrangement
View in mounting direction
5
8
4
device
Line
1
6
TFS2574 , -2 , -3 , -5
3
device
All dimensions
are in inches
DIA 0.060"
DIA 0.047"
ELECTRIAL SPECIFICATIONS
Line Impedance:
DCR (Ohms)
2574.CHP
TFS2574
100Ω
75Ω
0.6
0.7
> 2.2mH
1:1:1
1500
yes
yes
yes
yes
n/a
-2
120Ω
0.37
0.64
> 1.07mH
1.25:1:1
1500
n/a
yes
n/a
yes
n/a
-3
120Ω
0.6
0.6
> 1.5mH
1.25:1:1
1500
n/a
yes
n/a
yes
n/a
-4
75/120Ω
0.41
0.62
> 1.20mH
> 1.9mH
1:1:1
1.26:1
1500
n/a
yes
n/a
yes
n/a
-5
75Ω
0.41
0.75
> 0.8mH
1:1:1
1500
n/a
yes
n/a
yes
yes
T1 (MH89760)
CEPT(MH89790)
(1 - 8)
(3 - 6) & (4 - 5)
(1 - 8)
(1 - 7)
(1 - 8):(3 - 6):(4 - 5)
(1 - 7):(1 - 8)
Inductance (mH)
Turns Ratio
ISSUE : E
93/04/21
Dielectric Strength (V rms)
Applicable documents:
Longitudinal Bal.
Return Loss
ANSI T1.408
CCITT I.431
ANSI T1.408
CCITT G.703
BT BS6328
Filtran Limited
229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3
Tel : (613) 226 1626 Fax : (613) 226 7124
2-10
Embedded System
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EEWORLD
