4
FUNCTION
SWITCH SETTINGS
RESULT [(D) = Default]
Loopback (iView
2
Configurable)
S1-1: OFF
Loopback Disabled (D)
S1-1: ON
Loopback Enabled
Loopback Type (iView
2
Configurable)
S1-2: OFF
Coax (D)
S1-2: ON
Fiber
Jitter Attenuation (iView
2
Configurable)
S1-3: OFF
Jitter Attenuator on Receive Side
S1-3: ON
Jitter Attenuator on Transmit Side (D)
FiberAlert (iView
2
Configurable)
S1-4: OFF
FiberAlert Disabled (D)
S1-4: ON
FiberAlert Enabled
Line Build-Out (iView
2
Configurable)
S1-5: OFF
0 to 255 ft.
S1-5: ON
> 255 ft. (D)
Transmit Data Source (iView
2
Configurable)
S1-6: ON 7: ON
Standard Data (D)
S1-6: OFF 7: ON
Unframed All Ones
S1-6: ON 7: OFF
Alternating Ones & Zeros
S1-6: OFF 7: OFF
Pseudorandom Bit Sequence
DS3/E3/STS Selection
S1-8: ON 9: OFF
45 Mbps (DS3)
S1-8: OFF 9: ON
34 Mbps (E3)
S1-8: ON 9: ON
52 Mbps (STS)
Remote Unit
S1-10: OFF
Remote Unit Disabled (D)
S1-10: ON
Remote Unit Enabled
Feature Descriptions
The iMcV-DS3/E3/STS module includes several features that allow it to be configured
for varying DS3/E3/STS-based environments.
Loopback
This switch enables or disables the loopback feature. When this feature is enabled,
the data line (Coax or Fiber) set by the Loopback Type DIP Switch is looped back.
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.
5
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
wh3ere 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.
