XtendLan VC102SB – User’s Guide
http://www.xtendlan.com
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6 Cable
Requirements
A CAT 3,4 or 5 UTP (unshielded twisted pair) cable is typically used To connect the
Ethernet device to the Modem. A 10Base-T cable often consists of four pairs of wires, two
of which are used for transmission. The connector at the end of the10Base-T cable is
referred to as an RJ-45 connector and it consists of eight pins. The Ethernet standard uses
pins 1,2,3 and 6 for data transmission purposes.
RJ-45 Ethernet Connector Pin out assignments
PIN
MNEMONIC
FUNCTION
1
TX+
Ethernet differential Transmit )
2
TX-
Ethernet differential Transmit signal(-)
3
RX+
Ethernet differential receive )
4
NC
Unused
5
NC
Unused
6
RX-
Ethernet differential receive signal(-)
7
NC
Unused
8
NC
Unused
Standard telephone wire of any gauge or type-flat, twisted or quad is used to connect the Modem to
the telephone network. A telephone cable typically consists of three pairs of wires, one of which is
used for transmission. The connector at the end of the telephone cable is called an RJ-11 connector
and it consists of six pins. POTS (plain old telephone services) use pins 3 and 4 for voice
transmission.
The RJ-11 connectors have six positions, two of which are wired .The Modem uses the
center two pins. The pin out assignment for these connectors is presented below.
RJ-11 Pin out assignments
PIN
MNEMONIC
FUNCTION
1
NC
Unused
2
NC
Unused
3
TIP
POTS
4
RING
POTS
5
NC
Unused
6
NC
Unused
