T1/CEPT TFS2574 TFS 2574 Input Transformer T1 Intput Transformer TFS 2574 is specifically designed for use as a Line Input Transformer in T1/CEPT applications. It has been approved by MITEL for use with their MH89760 and MH89790 devices. TFS2574 is available in five versions: - 0, -2, -3, -4 and -5 for 100, 120 and 75/120Ω line impedances. Through Hole Standard .................................................... 2-10 Typical applications are: • PBX or computer to T1/CEPT Digital Trunks. • High speed data link using T1/CEPT Digital Trunk. • TDM Multiplexers. • ISDN Primary Rate. Also suitable as Input/Ouput transformer for other makes of T1/CEPT interface devices. MECHANICAL TFS2574 , -2 , -3 , -5 TFS2574-4 3 3 device device 1 com 1 6 6 Line Line 75 8 4 120 7 4 8 device device 5 5 Hole arrangement View in mounting direction DIA 0.060" All dimensions are in inches DIA 0.047" ELECTRIAL SPECIFICATIONS Line Impedance: T1 (MH89760) CEPT(MH89790) ISSUE : E 93/04/21 2574.CHP DCR (Ohms) Filtran Limited -4 -5 120Ω 75/120Ω 75Ω 0.6 0.7 0.37 0.64 0.6 0.6 0.41 0.62 0.41 0.75 > 2.2mH > 1.07mH > 1.5mH > 1.20mH > 1.9mH > 0.8mH 1:1:1 1.25:1:1 1.25:1:1 1:1:1 1.26:1 1:1:1 1500 1500 1500 1500 1500 ANSI T1.408 CCITT I.431 yes yes n/a yes n/a yes n/a yes n/a yes ANSI T1.408 CCITT G.703 BT BS6328 yes yes n/a n/a yes n/a n/a yes n/a n/a yes n/a n/a yes yes (1 - 8) (1 - 7) (1 - 8):(3 - 6):(4 - 5) (1 - 7):(1 - 8) Dielectric Strength (V rms) Return Loss -3 120Ω (1 - 8) (3 - 6) & (4 - 5) Applicable documents: Longitudinal Bal. -2 100Ω 75Ω Inductance (mH) Turns Ratio TFS2574 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3 Tel : (613) 226 1626 Fax : (613) 226 7124 2-10