System Ports; 10/100Base-Tx Ethernet Lan Ports - Nortel 1750 Install Manual

76 Appendix A Technical specifications
Table 17 Physical, electrical, and environmental specifications (continued)
Specification
Operating altitude
Storage altitude

System ports

The VPN Router 1750 system board provides the following built-in interfaces:
•
•
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 system board provides two 10/100BASE-TX Ethernet LAN interfaces—LAN
0 and LAN 1—on the rear of the chassis. (The LAN 0 interface is used for Web
management.) Both built-in LAN interfaces accommodate an RJ-45 straight-
through cable. Depending on whether you use the interfaces for 10BASE-T or
100BASE-TX operation, select cables for the interfaces as follows:
•
•
Figure 27
NN46110-316 02.01
two 10/100BASE-TX Ethernet local area network (LAN) ports
serial port
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.
shows the 10/100BASE-TX connector and the connector pinouts.
Description
8202 ft (2500 m) maximum
40,000 ft (12,192 m) maximum