Lanlink configurations
All fibre LAN Link solutions for both 10 Mbs
and 100 Mbs services are set up as follows:
- Speed is set to the required speed. ie. 10 or 100Meg
- Duplex is set to Full Duplex Operation
- Auto-Negotiation is set to OFF
- Customer service presentation is via a RJ-45 connector set to either 10BASET OR Fastethernet presentation
- Customers are not permitted to gain access to the internal workings of the NTU, which remains the property of Cable and Wireless Guernsey
- Customers are not permitted to move or shift the service from its original location
- All of the above settings are NOT user adjustable. Any attempt to alter the settings may leave the customer liable to criminal prosecution
Please note
Service units do NOT comply with the IEEE
802.3U specification for auto-negotiation as supplied and fitted.
The result of connecting equipment set to auto-negotiate is the
equipment will set itself to Half Duplex when the Interface
Converter is running at Full- Duplex resulting in the following
fault conditions.
- Collisions
- Late Collisions
- FCS Errors
- Duplex Miss-match
The result being that data throughput will be
only a fraction of the theoretical capacity. The solution is to set
the ports of the attached equipment to Full Duplex and the
appropriate speed also ensuring all auto-negotiation is switched
OFF.