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RJ-45 LAN Port
Table 4-10. LAN Port Pin Assignments
Note: The following table is correct for 10Base-T and 100Base-Tx, but not for
1000Base-T. For 1000Base-T pin assignments, go to one of the following Web sites:
http://www.foundrynet.com/services/documentation/EI48G/b_48Gcables.html
http://home.cfl.rr.com/bjp/RJ45pins.htm
Pin
Signal
1
TX+
2
TX-
3
RX+
4
5
6
RX-
7
8
IEEE 1394 Port
The IEEE 1394 ports on the Tablet PC and the Tablet
Dock conform to IEEE 1394 standards.
The IEEE 1394 and USB ports on the Tablet
Dock are independent ports (i.e., they are not
pass-through ports).
IEEE 1394 cable characteristics follow:
• Suggested maximum cable length: 4.5 meters
• 110 ohms characteristic impedance - differential
mode
• 33 ohms characteristic impedance - common mode
• Relative propagation skew < 400ps @ 100 MHz and
< 100ps @ 400 MHz (the difference between the
differential mode propagation delay of the two
twisted pair conductors that must be measured in
the frequency domain).
• TPA to TPB crosstalk < -26dB (within 1 MHz to
500 MHz range)
• Signal velocity equal to or less than 5.05ns/meter
• Signal pair attenuation:
100MHz = <2.3dB
200MHz = <3.2dB
400MHz = <5.8dB
1 2 3 4 5 6 7 8
Transmit +
Transmit -
Receive +
NC
Not used
NC
Not used
Receive -
NC
Not used
NC
Not used
4
Remarks
Table 4-11. IEEE 1394 Connector Pin Assignments
Pin
Signal
1
TPB-
2
TPB+
3
TPA-
4
TPA+
1
2
3
4
Remarks
Twisted Pair B - differential
signal
Twisted Pair A - differential
signal
RJ-45 LAN Port
4
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