Instruction manual

3
Modes of Operation
The McBasic 10/100 has three modes of operation:
• Auto Negotiation/PNP
• Force10
• Force100
The McBasic 10/100 should be configured for one of these modes (factory default is
AN/PNP mode). Refer to the following sections for more information.
NOTE
The McBasic 10/100 cannot be set for Half- or Full-Duplex manually. Duplex is determined
by the devices connected to the McBasic 10/100.
Auto Negotiation mode, also known as PNP, is the mode most ideally suited for the
McBasic 10/100. In this mode, the converter will optimally and automatically
configure for speed (10 or 100 Mbps) depending on the capabilities of the end
stations. To enable Auto Negotiation/PNP mode, set switch S6 to the ON position,
with switches S7 and S8 in the OFF position.
In Force 10 mode, the McBasic 10/100 acts as a 10Base-T to 10Base-FL media
converter; 100 Mbps signals are not accepted. To enable Force 10 mode, set switch
S7 and S8 to the ON position, with switch S6 in the OFF position.
In Force 100 mode, McBasic 10/100 acts as a 100Base-TX to100Base-SX multi-mode
or 100Base-FX single-mode fiber media converter; 10 Mbps signals are not accepted.
To enable Force 100 mode, set switch S7 to the ON position, with switches S6 and
S8 in the OFF position.
Auto Negotiation and the McBasic 10/100
When connecting two McBasic 10/100 units between two end stations (devices such
as switches or NICs), all devices in the media conversion should ideally support and
use Auto Negotiation. While it is possible to have Auto Negotiating devices on one
side of the media conversion and fixed (Force Mode non-Auto Negotiating) devices
on the other, link LEDs will react differently depending on where a link fault occurs.
IMC Networks recommends configuring every device in the media conversion for
Auto Negotiation.
For installations where Auto Negotiation is not possible from one end of the media
conversion to the other: Configure all devices for 10 Mbps or 100 Mbps connections
manually.