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| CEPT/T1 In/Output Transformer Typical applications are: * * * TEW4980 TEW4980 is designed to be used either as a transmit or a receive transformer in the ISDN primary access network, interfacing SIEMENS PEB2235 and PEB2236 to a 75, 100 or 120 ohm line. When in transmit mode, connect the two primary windings in parallel, pin 1 to 3 and pin 2 to 4. When in receive mode, connect the two primary windings in series, pin 2 to pin 3, thus forming a center tap at pin 2/3. Primary rate ISDN network nodes. PBX or computer to T1/CEPT Digital trunks. TDM Multiplexers. Certified to EN60950 & EN41003 MECHANICAL 5 1 2 3 8 TEW4980-1, -2, & -3 4 Com 5 1 2 WHITE DOT AT PIN 1 AlLL DIMENSIONS ARE IN INCHES 75 7 120 8 TEW4980-4 3 4 TEW4980.chp ELECTRICAL SPECIFICATION Line Impedance Inductance (mH) Turns ratio Pulse Mask Longitud. bal. Return Loss Dielectric Strength, (Vrms) (5-8) (1- 2):(3-4):(5-8) (1- 2):(3-4):(5-7) TEW4980 -1 75 > 0.75 1:1: 1.57 CEPT I.431 G.703 4000 -2 100 > 3.5 1:1: 2.67 T1/DS1 T1.408 T1.408 4000 -3 120 > 1.2 1:1: 2 CEPT I.431 G.703 4000 -4 75/120 > 1.2 1:1:2 1:1:1.6 CEPT I.431 G.703 4000 ISSUE: E 96/06/10 Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel : (613) 226-1626 Fax : (613) 226-7124 2-21 |
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