Enterasys Networks B3G124-24P manual 10BASE-TX Network, 100BASE-TX Network, 1000BASE-FX Network

10BASE-TX Network

10BASE-TX Network

When connecting a 10BASE‐TX segment to one of the RJ45 fixed ports on both the B3G124‐24P and the B3G124‐48P, ensure that the network meets the Ethernet network requirements of the IEEE 802.3‐2002 standard for 10BASE‐TX. Refer to the Cabling Guide for details.

Note: If a port is to operate at 100 or 1000 Mbps, Category 5 cabling must be used. Category 3 cabling does not meet the 100 or 1000 Mbps specifications. For 10 Mbps operation only, Category 3, Category 4, or Category 5 cabling can be used. Refer to 100BASE-TX Network (page 2-2) and 1000BASE-T Network (page 2-2) for information about 100BASE-TX and 1000BASE-T networks and cabling.

100BASE-TX Network

When connecting a 100BASE‐TX segment to one of the RJ45 fixed ports on both the B3G124‐24P and the B3G124‐48P, use Category 5 UTP cabling. The switch at the other end of the twisted pair segment must meet IEEE 802.3‐2002 100BASE‐TX Fast Ethernet network requirements for the switches to operate at 100 Mbps.

Note: When using the fixed ports on the switch for 100 Mbps operation use Category 5

UTP cabling with an impedance between 85 and 111 ohms for 100 Mbps operation.

Depending on the switch used, the fixed switch ports are capable of operating at 10 or 100 Mbps, or at 10, 100, or 1000 Mbps. This is accomplished when Auto-Negotiation is enabled, allowing the switch to automatically sense the transmission speed of the other device and adjust for the speed accordingly.

1000BASE-FX Network

The Mini‐GBIC port sockets on the B3G124‐24P and B3G124‐48P enable you to vary the type of 1‐Gbps port connection. The device at the other end of the segment must meet the same Gigabit Ethernet requirements for the connected devices to operate at 1‐Gigabit speed. Refer to Table 1‐2 on page 1‐6 for a list of Mini‐GBICs currently available from Enterasys Networks.

1000BASE-T Network

The RJ45 fixed front panel connectors support RJ45 copper 1000BASE‐T compliant connections. When connecting a 1000BASE‐T segment to one of the RJ45 fixed ports, use Category 5 UTP cabling or better. The device at the other end of the twisted pair segment must meet IEEE 802.3‐2002 1000BASE‐T Gigabit Ethernet network requirements for the devices to operate at 1000 Mbps.

The B3G124‐24P and B3G124‐48P can support 1000BASE‐T copper connections through MGBIC‐02s installed in the MGBIC port slots.

2-2 Network Requirements