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75/120 ohm Impedance Conversion Panel
The ONS 15454 SDH E1-75/120 impedance conversion panel provides front mount electrical connection for 42 ITU-compliant, G.703 E-1 ports. It contains 84 1.0/2.3 miniature coaxial connectors (42 for transmit, 42 for receive) to the client side and two 96-pin Molex type connectors to the FMEC 120-ohm side. Each of the 96-pin Molex type connectors connects 21 inputs and 21 outputs. Transformers in the E1-75/120 conversion panel improve decoupling from DC voltages and overvoltages. The E1-75/120 conversion panel is intended to be used in DDFs (digital distribution frames), ETSI racks, and ANSI racks. If you want to use the E1-75/120 conversion panel in a rack other than ETSI, remove the ETSI rackmount brackets shipped with the E1-75/120 and use the optional 19-inch/23-inch mounting bracket.
With the E1-75/120 conversion panel, each E1-42 port operates at 2.048 Mbps over a 75-ohm unbalanced coaxial 1.0/2.3 miniature coaxial connector
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