76 Appendix A Technical specificationsNN46110-311 02.01System portsThe VPN Router 2700 system board provides the following built-in interfaces:• 10/100BASE-TX Ethernet LAN port• serial portThis section provides information about the 10/100BASE-TX Ethernet LAN portand the serial port on the system board.10/100BASE-TX Ethernet LAN portThe system board provides one 10/100BASE-TX Ethernet LAN interface on therear of the chassis. Use this LAN interface, which accommodates an RJ-45straight- through cable, for Web management. Depending on whether you use theinterface for 10BASE-T or 100BASE-TX operation, select cables for the interfaceas follows:• 100BASE-TX connections require Category 5 twisted-pair wire. The100BASE-TX specification supports 100 Mb/s transmission over two pairs ofCategory 5 twisted-pair Ethernet wiring: one pair each for transmit andreceive operations.Nortel recommends a maximum length of 100 meters for the cable segmentbetween a 100BASE-TX repeater and a workstation (due to signal timingrequirements). This wiring scheme complies with the EIA 568 wiringstandard.• 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) maximumStorage altitude 40,000 ft (12,192 m) maximumTable 18 Physical, electrical, and environmental specifications (continued)Specification Description
