Installation Guide

24 4030542 Rev B

Auto-Negotiation, Duplex Mode, and Speed

The twisted-pair port on the Mini FiberLinX-II auto-negotiates for speed and duplex

mode, while also providing the option of selectively advertising or forcing the speed

and duplex mode.

The optics port does not auto-negotiate, but instead, operates at 100 Mbps full

duplex. Use the management software to configure the features on the twisted-pair

ports.

The Mini FiberLinX-II ships from the factory with Auto-Negotiation enabled on the

twisted-pair port. In this mode, the port automatically negotiates for speed and

duplex.

The twisted-pair port on the Mini FiberLinX-II can also be manually set for 10 Mbps

or 100 Mbps operation and for half or full duplex. These settings give the following

possible combinations:

 10 Mbps full duplex

 10 Mbps half duplex

 100 Mbps full duplex

 100 Mbps half duplex

Selective Advertising, when used in combination with Auto-Negotiation, advertises

only the configured speed and duplex mode for the twisted-pair port. If a specific

speed or duplex mode is desired, use Selective Advertising rather than Force Mode

when connecting to devices that only auto-negotiate.

Bandwidth Control

The Mini FiberLinX-II includes bi-directional bandwidth control, which can be

independently set in 32 Kbps increments up to 100 Mbps. Bandwidth control can be

configured through PrismaView2 or a console session. The device features an

integrating algorithm with a 64 Kb buffer, allows traffic bursts, to prevent lost data.

This allows operators to offer tiered services. See the PrismaView help file for

configuration information.

FX/TX LinkLoss and FiberAlert

During normal operation, link integrity pulses are transmitted by all point-to-point

Ethernet devices. When a Mini FiberLinX-II receives valid link pulses, it knows the

device to which it is connected is up, and the copper or fiber cable coming from that

device is intact. The appropriate LNK LED is lit to indicate this. For troubleshooting

information using the LinkLoss and FiberAlert features of the Mini FiberLinX-II

modules, refer to

Troubleshooting (on page 58).