3Com 3C780 User Guide - Page 108

The PMD Physical Layer Medium Dependent protocol defines the medium

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5-6 Using the Hub The Station Management (SMT) acronyms and other line items used in the show ports display are defined below along with the values that may appear. Module Designation The first line in the show ports display gives the slot number of the module represented by the display and the number of modules installed in the hub. These combinations are possible: s 1 of 1 one module installed; display describes module in slot 1 s 1 of 2 two modules installed; display describes module in slot 1 s 1 of 3 three modules installed; display describes module in slot 1 s 2 of 2 two modules installed; display describes module in slot 2 s 2 of 3 three modules installed; display describes module in slot 2 s 3 of 3 three modules installed; display describes module in slot 3 PMD Class The PMD (Physical Layer Medium Dependent) protocol defines the medium that provides the physical link between two adjacent FDDI stations. Table 5-3 lists and defines the port media types for the PMD Class line in Figure 5-7. Table 5-3. Port Media Types Medium Definition Fiber 62.5 micron multimode fiber STP Shielded twisted pair UTP Unshielded twisted pair LCF Low-cost fiber N/S Not specified Unknown Unknown connecting medium Sonet Synchronous optical network

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5-6
Using the Hub
The Station Management (SMT) acronyms and other line items used in the
show
ports
display are defined below along with the values that may appear.
Module Designation
The first line in the
show ports
display gives the slot number of the module
represented by the display and the number of modules installed in the hub.
These combinations are possible:
■
1 of 1
one module installed; display describes module in slot 1
■
1 of 2
two modules installed; display describes module in slot 1
■
1 of 3
three modules installed; display describes module in slot 1
■
2 of 2
two modules installed; display describes module in slot 2
■
2 of 3
three modules installed; display describes module in slot 2
■
3 of 3
three modules installed; display describes module in slot 3
PMD Class
The PMD (Physical Layer Medium Dependent) protocol defines the medium
that provides the physical link between two adjacent FDDI stations.
Table 5-3
lists and defines the port media types for the PMD Class line in Figure 5-7.
Table 5-3.
Port Media Types
Medium
Definition
Fiber
62.5 micron multimode fiber
STP
Shielded twisted pair
UTP
Unshielded twisted pair
LCF
Low-cost fiber
N/S
Not specified
Unknown
Unknown connecting medium
Sonet
Synchronous optical network