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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter3 Electrical Cards
3.13 E1-75/120 Impedance Conversion Panel
Figure 3-13 shows the E1-75/120 with optional rackmount brackets installed.
Figure3-13 E1-75/120 with Optional Rackmount Brackets
Figure 3-14 shows a block diagram of the impedance conversion panel.
Figure3-14 E1-75/120 Impedance Conversion Panel Block Diagram
83636
19 to 23 in.
rackmount
bracket
ETSI
rackmount
bracket
42 Channels
120-Ohm
Symmetrical Signals
75-Ohm
Unsymmetrical Signals
Transformer 1.26:1
83637
42 Channels
Transformer 1.26:1