Cable Length And Lobe Wiring Rules For Dedicated-Media Lan Segments; Table 17. Lobe Length For 150 Ohm Shielded Media; Table 18. Lobe Lengths For 100 Ohm Shielded Or Unshielded Cable - Cabletron Systems SmartSTACK STS16-20RM Installation And User Manual

Cable Length and Lobe Wiring Rules for
Dedicated-Media LAN Segments
The Cabletron 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.
STS16-20RM Token Ring Switch
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
Speed
4 Mbps 750 m (2,460 ft) 750 m (2,460 ft) 376 m (1,234 ft) 500 m (1,640 ft)
16 Mbps 430 m (1,410 ft) 430 m (1,410 ft) 215 m (705 ft)
100 Mbps 90 m (295 ft)
See the Note
below!
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 17. Lobe Length for 150 Ohm Shielded Media

Ring Speed
4 Mbps
16 Mbps
100 Mbps

Table 18. Lobe Lengths for 100 Ohm Shielded or Unshielded Cable

Cable and Pin Information
Types
1 and 1A 2 and 2A
Not Supported
100 Ohm Type 3
100 m (328 ft)
Not Supported
Not supported
SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01
Types
Type 8
Not Supported
Type 9
295 m (968 ft)
Not Supported
100 Ohm Category 3
250 m (820 ft)
100 m (328 ft)
Not Supported
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