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42 Appendix A Technical specifications
NN46110-313 02.01
System ports
The VPN Router 1010/1050/1100 system board provides the following interfaces:
• 10/100BASE-TX Ethernet LAN ports
• Serial port
This section provides information about the 10/100BASE-TX Ethernet LAN ports
and the serial port on the system board.
10/100BASE-TX Ethernet LAN ports
The VPN Router 1010, 1050, and 1100 have two internal LANs built in:
• LAN 0 is the private LAN and also the LAN to use for Web management.
— The LAN 0 connector on the front of the VPN Router 1010 is an Ethernet
MDI configuration and requires a crossover cable (included with your
shipment).
— The LAN 0 connectors on the front of the VPN Router 1050 and 1100 are
an Ethernet medium dependent interface crossover (MDI-X)
configuration. These ports support the Auto-MDI-X feature, so either
straight-through or crossover cables can be used.
• LAN 1 defaults to a public LAN. The software refers to the LAN 1 port as slot
1, interface 1.
The LAN 1 connector on the front of the VPN Router 1010, 1050, and 1100 is an
Ethernet MDI configuration and requires an RJ-45 straight-through cable.
Depending on whether you use the interface for 10BASE-T or 100BASE-TX
operation, select cables for the interfaces as follows:
• 100BASE-TX connections require Category 5 twisted-pair wire. The
100BASE-TX specification supports 100 Mb/s transmission over two pairs of
Category 5 twisted-pair Ethernet wiring: one pair each for transmit and
receive operations.
Nortel recommends a maximum length of 100 meters for the cable segment
between a 100BASE-TX repeater and a workstation (due to signal timing
requirements). This wiring scheme complies with the EIA 568 wiring
standard.