Nortel Networks 1050, 1100, 1010 manual System ports, 10/100BASE-TX Ethernet LAN ports

42 Appendix A Technical specifications

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.

NN46110-313 02.01