CEPT /T1 TEW4921 Output Transformer TEW4921 is designed and approved to be used as a transmit transformer with the Mitel MT89760/-60B and MT89790/90B devices in T1 and CEPT applications. Complies with ANSI T1.408 and CCITT I.431., with regards to Longitudinal Balance. Typical applications are: TEW4921-2 is designed for MT89790B when operating from a single 5 Vdc supply. BABT certified for reinforced insulation to EN60950 & EN41003. Cert #: CR/T/0052 • • • Primary rate ISDN network nodes. PBX or computer to T1/CEPT Digital Trunks. TDM Multiplexers. Fully encapsulated in epoxy. MECHANICAL 6 1 Device 2 Line side 4 3 TEW4921 & -1 6 Line side WHITE DOT AT PIN 1 1 2 5 4 Device 3 TEW4921-2 ELECTRICAL SPECIFICATIONS TEW4921 94/11/02 TEW4921.chp Impedance DCR Turns ratio Inductance ISSUE: E (Ohms) (1 - 3) (6 - 4) (1-2):(2-3):(6 -4) (1-2):(2-3):(6 -5) (mH) (6 - 4) Pulse Mask Longitud. Bal. (dB) 50 - 1544 KHz Dielectric Strength, (Vrms) Temperatures Operating Storage Filtran Limited TEW4921-1 TEW4921-2 100 & 120 Ω 75 Ω 75/120 Ω 3.5 0.35 3.5 0.25 3.5 0.35 1 : 1 : 0.53 n/a 1 : 1 : 0.39 n/a 1 : 1 : 1.37 1 : 1 : 1.12 > 1.0 > 0.57 > 1.5 T1 & CEPT CEPT CEPT > 40 dB > 40 dB > 40 dB 4000 V 4000 V 4000 V 0o to 50o C -20o to 80o C 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel : (613) 226 1626 Fax : (613) 226 7124 2-15