BASIC INTERFACE Figure 9-1
toward the network)
1) All resistor values are ±1%.
2) In E1 applications, the Rt resistors are used to increase the transmitter return loss (Table 9-1). No
return loss is required for T1 applications.
3) The Rr resistors should be set to 60W each if the internal receive-side termination feature is enabled.
When this feature is disabled, Rr = 37.5W for 75W or 60W for 120W E1 systems, or 50W for 100W
4) See Table 9-1 and Table 9-2 for the appropriate transmit transformer turns ratio (N).
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(this clock can also
be 1.544MHz for T1