CEPT/T1 TEW4977 Input/Output Transformer TEW4977 & -1 are designed and approved to be used as an Input transformer with the following devices. Fully encapsulated in epoxy. Typical applications are: CS61534, 61535, 61574, 6158, 61535A, 61574A, 61575, 6158A. Level One LXT 300, 301, 305, 304A,305A • Primary rate ISDN network nodes. • PBX or computer to T1/CEPT Digital trunks. • High speed data link using T1/CEPT Digital trunk. • TDM Multiplexers. Crystal Also as an Output transformer for: Crystal CS61534, 61535, 61574 & 6158. Level One LXT 300, 301, 305 TEW4977-2 is designed to be used as an Output transformer, and TEW4977-3 as an Input trf. for: BABT certified for reinforced insulation to EN60950 & EN41003 Cert # CR/T/0052 Brooktree BT8069B device MECHANICAL 6 1 Line side 2 Device 4 WHITE DOT AT PIN 1 All dimensions are in inches 97/10/22 4977.chp ELECTRICAL SPECIFICATION ISSUE: F 3 TEW4977 -1 -2 -3 -4 75, 100 & 120 75 75, 100 & 120 75, 100 & 120 75 & 120 1.15 nom. 0.60 nom. 1.6 0.8 0.7 nom 1.2 nom 0.7 nom 0.7 nom 1.2 nom 0.7 nom 1 : 2 c.t. —- 1 : 2 c.t. —- 2 : 1 c.t. —- 1:1 —- 1:2 1 : 1.58 > 1.2 > 0 .8 > 4.8 > 1.2 > 1.2 Longitud. Bal. T1.408 I.431 I.431 T1.408 I.431 T1.408 I.431 I.431 Return Loss T1.40 G.703 G.703 BS6328 n/a G.703 G.703 4000 4000 4000 4000 4000 Line Impedance (Ohms) DCR (Ohms) Turns ratio Inductance Dielectric Strength Filtran Limited (1 - 3) (6 - 4) (6 - 4) : (1 - 3) (6 : 4) : (1 - 2) (mH) (Vrms) (6 - 4) 229 Colonnade Road, Nepean, Ontario, Canada, K2E 7K3 Tel: (613) 226-1626 Fax: (613) 226-7124 2-18