Bay Technical Associates BayStack 304 - Manual (Page 86)

Using the BayStack 303 and 304 Ethernet Switches
4-6 893-01010-A
The 100 Mb/s ports are designed to operate using Category 5 UTP cabling only.
Category 5 UTP cable is a 2-pair cable certified to handle up to 100 MHz
bandwidth. To minimize crosstalk noise, maintain the twist ratio of the cable up to
the point of termination (untwist at any termination should not exceed 0.5 inches).
For best performance with respect to noise immunity and emissions, the unused
pairs in the 2-pair cable should be terminated at their characteristic impedance
(that is, 100 ohms) in the equipment at each end of the cable. All Bay Networks
100BASE-TX equipment includes such a Common Mode Termination (CMT).
The fiber media adapter for the 100BASE-FX port uses only multimode
62.5/125
µ
m fiber cable. The Bay Networks 100BASE-FX media adapter is not
supported on single-mode fiber. SC connectors are used on all fiber port
connections.
Link Status
The 10BASE-T ports use link test pulses to provide a mechanism to ensure that
the link between the connected devices is valid. When the link is inactive, link test
pulses are transmitted approximately every 16 microseconds (ms). The 100 Mb/s
port also ensures valid links between connected devices.
When link status is shown in an LED, you can immediately see if the cables are
connected correctly, assuming that the other equipment also sends link status
pulses. Link status should be used whenever possible to check for potential wiring
issues.
89301010.BK Page 6 Tuesday, June 10, 1997 8:00 PM