Cabletron Systems STS16-20D 234, If using any 4 Mbps only adapters or filters, Ring Types Speed

234

if using any 4 Mbps only adapters or filters).

Cable Length and Lobe Wiring Rules for Dedicated-Media LAN Segments

The Cabletron Systems Token Ring network dedicated-media (full-duplex) connections support only one attached entity (workstation or switch) per connection. In a Token Ring network, the section of cable that attaches a device to an access unit is called a lobe.

The tables in this section specify the maximum supported lobe lengths for the types of cables listed. An additional 10 m (33 ft) per lobe length is allowed to accommodate patch cables, unless otherwise specified.

	Ring	Types	Types		Type 8		Type 9
Speed		1 and 1A	2 and 2A
4 Mbps		750 m (2460 ft)	750 m (2460 ft)	376 m (1234 ft)			500 m (1640 ft)
16 Mbps		430 m (1410 ft)	430 m (1410 ft)	215 m (705 ft)			295 m (968 ft)
100 Mbps		90 m (295 ft)	Not Supported	Not Supported			Not Supported
		See the Note!
➽	Note: An additional 10 m (33 ft) UTP 100 Ohm CAT.5 lobe length and a
	maximum of two UTP/STP converters without impedance transformation
	is allowed to accommodate connection to the STP cabling. The UTP/STP
	converter must be specified for 100 MHz operation.
Table 19. Lobe Length for 150 Ohm Shielded Media
	Ring Speed		100 Ohm Type 3			100 Ohm Category 3
4 Mbps			100 m (328 ft)			250 m (820 ft)
16 Mbps			Not Supported			100 m (328 ft)
100 Mbps			Not Supported			Not Supported

Table 20. Lobe Lengths for 100 Ohm Shielded or Unshielded Cable

SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Cable and Pin Information