Cabletron Systems STHI-44 User Manual

 

Page 1-3

 

Cabletron Systems’ LANVIEW Status Monitoring and Diagnostics 
System is a troubleshooting tool. Conveniently located on the front panel, 
LANVIEW LEDs help the user to quickly identify power failures, 
beaconing conditions, cable faults, and link problems.

 

 for more information on the 

LANVIEW LED visual status monitoring system.

 

Each STH, depending on the STH model (see Table 1-1. ), is equipped 
with 12 or 24 TCU ports, each fitted with a female RJ45 modular 
connector jack to support the attachment of either STP (shielded twisted 
pair) or UTP (unshielded twisted pair) cabling with RJ45 connector plugs. 
Models that support STP cabling use RJ45 connectors that provide a 
grounded connection for the cabling shield. 

 

Each TCU port on the STH is internally defaulted to operate as a lobe 
interface to support the insertion of a Token Ring station into a ring. 
However, each TCU port may also be reconfigured, via the intelligent 
hub’s Local Management (LM) application, to function as a Ring Out port 
to support the connection of non-intelligent, passive MAU (Multi-Station 
Access Unit) workgroups. See Section 1.2.4, 

 

.

 

STH hubs also provide Ring Speed Fault Protection on each TCU port to 
protect against beaconing conditions caused by stations inserted at the 

 

Table 1-1. Port and Media List for 

 

STH

 

 Models

 

STH

 

-22

12 - Unshielded RJ45 ports

 

STH

 

-24

24 - Unshielded RJ45 ports

 

STH

 

-42

12 - Shielded RJ45 ports

 

STH

 

-44

24 - Shielded RJ45 ports