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CEPT/T1
TEW4922 is designed and approved to be used as a receive transformer with MITEL MT89760/-60B and MT89790/-90B devices. Fully encapsulated in epoxy. Also suitable as input/output transformer for other makes of T1/CEPT interface devices.
Input Transformer
TEW4922
Typical applications are:
• • •
Primary rate ISDN network nodes. PBX or computer to T1/CEPT Digital Trunks. High speed data link using T1/CEPT Digital Trunk.
BABT certified for reinforced insulation to EN60950 & EN41003.
Cert #: CR/T/0052 MECHANICAL
6 Line 4
TEW4922-1, -2 @ -3
1 2 3 Device
com 6 Line
WHITE DOT AT PIN 1
1 2 3
TEW4922-4
75 Ω 5 120 Ω 4
Device
ELECTRICAL SPECIFICATION Devices Application Line Impedance DCR
4922.chp
TEW4922-1 MT89760 MT89760B T1 100 Ω
-2 MT89790 MT89790B CEPT 120 Ω 1.55 1.08 1 : 1 : 1.26 —> 2.8 I.431 G.703 4000V
-3 MT89790 MT89790B CEPT 75 Ω 1.11 0.55 1:1:1 —> 0.70 I.431 G.703 BS6328 4000V
-4 MT89790 MT89790B CEPT 75/120 Ω 1.1 0.7 1 : 1 : 1.26 1:1:1 > 2.8 I.431 G.703 BS6328 4000V
(Ohms)
(1 - 3) (6 - 4) (1 - 2) : (2 - 3): (6 - 4) (1 - 2) : (2 - 3): (6 - 5)
1.55 0.85 1: 1 : 1 —> 3.5 T1.408 T1.408
Turns ratio Inductance Longitud. Bal. Return Loss Dielectric Strength, Volts RMS Temperatures, Operating Storage (mH)
ISSUE: D , 95/04/25
(6 - 4)
4000V to -20 to 80 C 0o o 50oC o
4000V
Filtran Limited
229 Colonnade Road, Nepean, Ontario, Canada, K2E 7K3 Tel: (613) 226-1626 Fax: (613) 226-7124
2-16
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