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