Nortel Networks 2700 User Manual

  Appendix A  Technical specifications

NN46110-311 02.01

The VPN Router 2700 system board provides the following built-in interfaces:

•

10/100BASE-TX Ethernet LAN port

•

serial  port

This section provides information about the 10/100BASE-TX Ethernet LAN port 
and the serial port on the system board.

The system board provides one 10/100BASE-TX Ethernet LAN interface on the 
rear of the chassis. Use this LAN interface, which accommodates an RJ-45 
straight- through cable, for Web management. Depending on whether you use the 
interface for 10BASE-T or 100BASE-TX operation, select cables for the interface 
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.

•

10BASE-T connections can use Category 3, 4, or 5 twisted-pair wiring.

Figure 27 

shows the 10/100BASE-TX connector and the connector pinouts.

Operating altitude

7000 ft (2133.6 m) maximum

Storage altitude

40,000 ft (12,192 m) maximum

Physical, electrical, and environmental specifications  (continued)