Cable and Ethernet Specifications B-7
High-Density 50-Pin Cable
High-Density 50-Pin Cable
A 3-foot (90cm) long cable that splits into two 50-pin high-density connectors is
required for use with a U.S. Robotics Quad modem rack. To order this cable from
Lucent, specify product code DC-HDM.
Table B-4 gives pinout information for this cable.
Ta b l e B - 4 High-Density 50-Pin Cable
Quad Port Signal Definition
68-Pin
Number Connection Pin
A 1 RTS Request to Send 2 1 3
DTR Data Terminal Ready 36 1 5
TXD Transmit Data 3 1 1
SGND Signal Ground 37 1 7
DSR Data Set Ready 4 1 11
RXD Receive Data 38 1 2
DCD Data Carrier Detect 5 1 6
CTS Clear to Send 39 1 4
2 RTS Request to Send 6 1 28
DTR Data Terminal Ready 40 1 30
TXD Transmit Data 7 1 26
SGND Signal Ground 41 1 32
DSR Data Set Ready 8 1 36
RXD Receive Data 42 1 27
DCD Data Carrier Detect 9 1 31
CTS Clear to Send 43 1 29
3 RTS Request to Send 10 1 40
DTR Data Terminal Ready 44 1 42
TXD Transmit Data 11 1 38
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