76Appendix A Technical specifications
Table 18 Physical, electrical, and environmental specifications (continued)
Specification | Description |
| |
Operating altitude | 7000 ft (2133.6 m) maximum |
| |
Storage altitude | 40,000 ft (12,192 m) maximum |
| |
System ports
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.
10/100BASE-TX Ethernet LAN port
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.
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