www.DataSheet4U.com T1/CEPT High Voltage Isolation Transformer TEW5767 TEW5767 is specifically designed to be used as a high voltage isolationtransformer in T1 and CEPT applications. The Longitudinal balance exceeds the requirements of CCITT I.431. The Return Loss exceeds the requirements of CCITT G.703. MECHANICAL 1 Sec 3 6 Pri 4 White dot at pin 1 ELECTRICAL SPECIFICATIONS TEW5043. TEW5767-1 (4 - 6) (1 - 3) (4 - 6) : (1 : 3) 100 or 120 100 or 120 1:1 >3 T1/CEPT T1.408, I.431 T1.408,.