A
SmartClass E1 Tester User’s Guide 111
Appendix A
Signal Lead Names
The signal leads for the supported interfaces use a variety of names. The
names describe the circuits between DTE and DCE, for example TXD is the
transmit data circuit, an output at the DTE and an input at the DCE. As the role
of the test instrument changes, the direction of this signal in the connector
changes. Table 36 on page 112 provides a cross reference of signal lead
names, including signal direction.
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