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CEPT /T1 Input Transformer TEW5281
TEW5281 is designed and approved to be used as a Receive
Transformer in T1 and CEPT applications with the following devices:
– Dallas DS2187
– PMC -Sierra PM4341 T1X
PM6431 E1
– AT&T T729O
– EXAR T5683
TEW5281-3 is designed to be
used as an input transformer for:
– Dallas DS5151Q
DS5153Q
MECHANICAL
Complies with ANSI T1.408 and
CCITT I.431 with regards to
Longitudinal Balance, and with
T1.408, G.703 and BS6328 for
the Return Loss.
Typical applications are:
• Primary rate ISDN network
nodes.
• PBX or computer to
T1/CEPT Digital Trunks.
• TDM Multiplexers.
BABT certified for reinforced
insulation to EN60950 &
EN41003
Cert #: CR/T/0052
WHITE
DOT
AT PIN 1
6
Line side
4
1
2
3
Device
ELECTRICAL SPECIFICATIONS TEW5281-1 - 2 -3
Line Impedance 100, 120 Ω 75 Ω 75,100
120
DCR (Ohms) nom (1 - 3) 1.55 1.11 0.8
nom (6 - 4) 0.85 0.55 0.7
Turns Ratio (6 - 4):(1 - 3) 1 : 2 1 : 2 1 : 1
Inductance (mH) ( 6 - 4) > 3.5 > 0.7 1.8
Pulse Mask T1 & CEPT CEPT T1 & CEPT
Longitud. Bal. T1.408 & I.731 I.431 T1.408 & I.731
Return Loss T1.408 G.703 T1.408 & G.703
ISSUE: D 97/09/08 5281.chp
G.703 BS6328
Dielectric Strength (Vrms) 4000 4000 4000
Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, 2-30
Tel : (613) 226 1626 Fax : (613) 226 7124
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