METRObility Optical Systems Delta Class Installation And User Manual page 7

For example, if FEF is enabled on both units and the remote unit's fiber
receiver (RX) stops detecting link pulses, then its fiber transmitter (TX)
will send an alarm. The local "twister" will receive the alarm and report it
through its fiber port FEF LED, which will turn amber. No alarm will be
issued if FEF is disabled on the remote unit. The FEF LED will not turn
amber if FEF is disabled on the local "twister" because it will not be able
to detect the alarm.
Far End Fault is enabled on Port 2 when switch FEF is ON. The unit is
shipped with FEF disabled. Refer to
section of this manual for more information.
Auto-Negotiation Switch (AN1)
Switch AN1 controls the use of auto-negotiation on the copper port. Auto-
negotiation determines whether the port operates at half or full duplex.
When AN1 is enabled, the copper port will advertise full duplex capabili-
ties to its connected device, if the duplex switch, FD1, is enabled. The
port will advertise half duplex capabilities if FD1 is disabled. If AN1 is
disabled, the duplex switch will determine the port's duplex mode. By
default, auto-negotiation is enabled.
Duplex Switch (FD1)
Switch FD1 sets the duplex mode for the copper port when auto-negotia-
tion is disabled. The copper port operates at full duplex when FD1 is
enabled; and it operates at half duplex when FD1 is disabled. If auto-
negotiation is enabled, the FD1 switch setting will determine whether the
port advertises full or half duplex (refer to Auto-Negotiation above). The
default is set to full duplex enabled.
Copper Port Configuration Table
Use the table below to set the duplex and auto-negotiation DIP
switches to obtain specific modes of operation for the copper port.
C o p p r e P o t r
F l l u D u p e l x
H a f l D u p e l x
A t u - o N e g t o a i e t
A t u - o N e g t o a i e t
Disable Loopback Switch (DSLB)
This switch determines the response of the fiber port when it receives the
remote loopback command. If the DSLB switch is enabled, the port will
ignore all remote loopback commands. When the switch is disabled, the
port will permit remote loopback to occur. By default, the response switch
is disabled, which allows remote loopback.
C o f n g i r u t a o i n F
O
O
F l l u D u p e l x O
H a f l D u p e l x O
Far End Fault
D 1 A N 1
N O F F
F F O F F
N O N
F F O N
in the User Guide
Installation Guide 7