METRObility Optical Systems RADIANCE 10/100MBPS ACCESS OPTICAL NETWORK UNIT manual Duplex

Duplex

The DUPLEX switch sets the duplex mode on the copper port when auto-negotiation is disabled. The copper port operates at full duplex when DUPLEX is ON. It operates at half duplex when DUPLEX is OFF.

When auto-negotiation is enabled, the DUPLEX switch setting is ignored.

Auto-Negotiation

Auto-negotiation is supported only on the copper port. When switch AUTONEG is ON, the copper port advertises 100Mbps full-duplex capabilities to its link partner.

When auto-negotiation is disabled, the copper port’s duplex is set through the DUPLEX switch, and its speed is set by the 100M switch.

Speed

Switch 100M determines the speed setting for the copper port when auto-negotiation is disabled. The copper port speed is set to 100Mbps when the 100M switch is ON, and 10Mbps when it is OFF.

The 100M switch setting is ignored when auto-negotiation is ON.

Far End Fault

Far End Fault (FEF) only applies to the fiber optic port. FEF enables a managed Radiance Access Line Card in a central office to detect a break in the Access ONU’s fiber port receiver. If FEF is enabled on the Access ONU and its fiber port stops receiving link signals, an unsolic- ited alarm will be sent to its Access Line Card partner. No alarms will be issued if FEF is disabled.

Link Loss Return

Link Loss Return (LLR) is only applicable to the fiber port. When LLR is enabled, loss of the receive signal at the port disables its own transmitter from emitting link pulses. When LLR is disabled, the fiber port continually transmits an idle signal.

Refer to Link Loss Return for additional information.

8 Installation Guide