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Pin Mnemonic Signal Name Description
6 DSR Data Set
Ready
Used by the DCE to indicate if it is ready to
operate. When DSR is ON, the DCE is
connected to the line and ready to exchange
further control signals to start data transfer.
7 Gnd Signal
Ground
8 DCD Data Carrier
Detect
Used by the DCE to indicate it is receiving a
suitable signal from the communications
channel.
9 Not
connected
None.
10 Not
connected
None.
11 Not
connected
None.
12 Not
connected
None.
13 Not
connected
None.
14 Not
connected
None.
15 TRXC Transmit
Clock
Used by the DCE to provide timing
information to the DTE. The DTE provides
data on TXD in which the transition of the bit
corresponds to the rising edge of the clock.
16 Not
Connected
None.
17 RTXC Receive
Clock
Used by the DCE to provide timing
information to the DTE. The falling edge of
the clock corresponds to the center of the
data bit received on RXD.
18 Not
connected
None.
19 Not
connected
None.
234 Sun Enterprise 220R Server Service Manual ♦ January 2000, Revision A