ISDN S-Bus TPW3852 Input/Output Transformer The 4 wire interface between Subscriber Terminals and the Network Termination has been standardized by CCITT recommendation I.430. It uses a passive bus which provides separate receive and transmit loops operating at 192 Kbits/s. Two versions of TPW3852 have been designed and approved for use with the following devices: TEW3852 Siemens PEB2080 PEB2081 PEB2085 PEB2086 AMD Am79C30A TPW3852-4 Mitel MT8930A, -B, -C MT8931B, -C (See schematic below for correct connections.) MECHANICAL Dot at pin 1 TPW3852-4 5 6 1 2 3 TPW3852-4 3 2 1 6 5 All dimensions are in inches 2 3 2 4 Device Line 1 Line 1 ISSUE: G 98/04/06 3852.chp Device Turns ratio Inductance Leakage Ind. DC Resistance (2 - 6) : (5 - 3) (2 - 6) (2 - 6) (2 - 6) (3 - 5) Output Impedance Pulse Characteristics Dielectric Strength, (rms) Filtran Limited 3 TPW3852 TPW3852-4 ELECTRICAL 4 Device 6 5 6 5 TPW3852 TPW3852-4 PEB2080 PEB2085 PEB2086 Am79C30A MT8930A, -B, -C MT8931B, -C 1:2 > 22 mH < 12 µH 1.0 Ω 9.0 Ω 1:2 > 20 mH < 6.0 µH 3.2 Ω 6.3 Ω Conforms to the impedance mask specified in I.430 Conforms to the pulse mask specified in I.430 1500 V 1500 V 229 Colonnade Road, Nepean, Ontario, Canada. K2E 3K7, Tel : (613) 226 1626 Fax : (613) 226 7124 3-5