Enterasys Networks Enterasys SecureStack B2 B2G124-24 - Manual (Page 30)

100BASE-TX Network
2-2 Network Requirements
100BASE-TX Network
When connecting a 100BASE‐TX segment to one of the fixed ports (1 through 24 on
B2G124‐24, 1 through 48 on B2G124‐48, or 1 through 48 on B2H124‐48), 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.
1000BASE-FX Network
The Mini‐GBIC port sockets (21 through 24 on B2G124‐24; 45 through 48 on B2G124‐48; or
49 through 52 on B2H124‐48) enable you to vary the type of 1‐Gbps port connection. At
the printing of this document there were five supported Mini‐GBICs available, as follows:
• MGBIC‐LC01 for a 1000BASE‐SX compliant LC fiber‐optic multimode connection
• MGBIC‐LC03 for a 1000BASE‐SX compliant LC fiber‐optic 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
The device at the other end of the fiber connection must meet the same Gigabit Ethernet
requirements for the connected devices to operate at 1‐Gigabit speed.
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. 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.
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.