Enterasys Networks C2G124-48P 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 (1 through 48) on both the C2G124‐48P and the C2H124‐48P, 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 2-3) 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 (1 through 48) on both the C2G124‐48P and the C2H124‐48P, 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.

The fixed switch ports are capable of operating at 10, 100 or 1000 Mbps. This is accomplished by the switch when Auto-Negotiation is enabled. This enables 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 C2G124‐48P and C2H124‐48P enable you to vary the type of 1‐Gbps port connection. The device at the other end segment must meet the same Gigabit Ethernet requirements for the connected devices to operate at 1‐Gigabit speed. At the printing of this document there were five Mini‐GBICs available that support fiber‐ optic connections, as listed below, and one that supports a copper connection as described in “1000BASE‐T Network” on page 2‐3:

•MGBIC‐LC01 for a 1000BASE‐SX compliant LC fiber‐optic multimode connection

•MGBIC‐LC03 for a 1000BASE‐SX standard LC duplex style connector multimode connection

•MGBIC‐LC09 for a 1000BASE‐LX compliant LC fiber‐optic single‐mode connection

•MGBIC‐MT01 for a 1000BASE‐SX compliant MT‐RJ fiber‐optic single‐mode connection

•MGBIC‐08 for a 1000BASE‐ELX compliant LC fiber‐optic single‐mode connection

2-2 Network Requirements