ISDN S-Bus TEW6197 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 receiver and transmit loops operating at 192 Kbits/s. Two versions of TEW6197 have been designed and approved for use with the following devices: TEW6197 Siemens AMD TEW6197- 4 Mitel PEB2080 PEB2081 PEB2085 PEB2086 Am79C30A MT8930A MT8930B MT8931B (See schematic below for correct connections.) MECHANICAL TEW6197-4 Top view 17.0 ± 0.02 2 3 4 1.6 9 8 7 2.54 (8 places) 13.0 ± 0.2 All dimensions 0.7 are in mm TEW6197-4 10.16 0.85 4 3 2 2.54 13.0 7 8 9 17.8 RECOMMENDED FOOT PRINT 4 7 < 13.0 3 Device Line 8 2 9 TEW6197 ELECTRICAL ISSUE: A 97/12/11 6197.chp Device Turns ratio Inductance Leakage Ind. DC Resistance (7 - 9) : (4 - 2) (7 - 9) (7 - 9) (7 - 9) (4 - 2) Output Impedance Pulse Characteristics Dielectric Strength, (rms) Filtran Limited TEW6197 TEW6197-4 PEB2080 PEB2085 PEB2086 Am79C30A MT8930A MT8930B MT8931B 1:2 > 22 mH < 12 µH 1.0 Ω 9.0 Ω 1:2 > 22mH < 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 3-21