Instruction manual
6
Loopback Type
This switch controls which data line is looped back when the Loopback DIP
Switch is enabled. The data line loopback selection can be either Fiber Loopback
or Coax Loopback.
By default this feature is set to
COAX
.
This feature can be controlled by SNMP management software (iView
2
) when the
iMcV-DS3/E3/STS module is installed in a managed chassis.
Jitter Attenuation
This switch selects the jitter attenuation location on the coax transceiver. The
jitter attenuation can be set on the transmit side or on the receive side of the coax
transceiver.
Jitter attenuation is useful for decreasing jitter in the coax data stream. This helps
prevent data degradation caused by jitter. Jitter attenuation is always enabled.
By default this feature is set to
TRANSMIT
.
This feature can be controlled by SNMP management software (iView
2
) when the
iMcV-DS3/E3/STS module is installed in a managed chassis.
FiberAlert
This switch enables or disables the FiberAlert feature. This feature must only be
enabled on the remote end of a Host/Remote iMcV-DS3/E3/STS pair.
The FiberAlert feature uses the iMcV-DS3/E3/STS module LEDs to indicate that a
loss of one strand of fiber has occurred. When a strand becomes unavailable, the
iMcV-DS3/E3/STS module at the receiver-end detects the loss of the link. The
module then responds by stopping the transmission of the data and link signal
until a new signal or link pulse is received on the strand. The result is that the
NO
LNK
LED on both sides of the fiber connection will light up to indicate the
presence of a fault somewhere in the fiber loop. By using FiberAlert, a local site
administrator can quickly determine where a fiber cable fault is located.
By default this feature is set to
DISABLED
.
This feature can be controlled by SNMP management software (iView
2
) when the
iMcV-DS3/E3/STS module is installed in a managed chassis.
** WARNING **
Enabling FiberAlert on both of the iMcV-DS3/E3/STS modules will cause them both to stop
transmitting unrecoverably when a fault occurs. This feature is designed to only be
enabled on the Remote iMcV-DS3/E3/STS module.