ADTRAN DS3 NIU3 PM Installation And Maintenance Practice page 7

Condition Detected
LOS detected on Network
Interface
LOF detected on Network
Interface
AIS detected on Network
Interface
LOS detected on Customer
Interface
LOF detected on Customer
Interface
AIS detected on Customer
Interface
RAI detected on Customer
Interface
61213075L2-5E
Table 3. Fault Conditions
Direction of Transmission
Network Interface to Customer
Interface
Customer Interface to Network
Interface
Network Interface to Customer
Interface
Customer Interface to Network
Interface
Network Interface to Customer
Interface
Customer Interface to Network
Interface
Customer Interface to Network
Interface
Customer Interface to Network
Interface
Customer Interface to Network
Interface
Customer Interface to Network
Interface
Issue 5, February 2011
Transmission
Unframed all ones signal is transmitted to the
Customer Interface
RAI is transmitted to the Network Interface
If "Send AIS/RAI when LOF detected" = Disabled,
then unframed DS3 payload is transparently passed
through to the Customer Interface.
If "Send AIS/RAI when LOF detected" = Enabled,
then unframed DS3 payload is transparently passed
through to the Customer Interface.
If "Send AIS/RAI when LOF detected" = Disabled,
then Customer Interface signal is transparently
passed through to the Network Interface.
If "Send AIS/RAI when LOF detected" = Enabled,
then RAI is transmitted to the Network Interface.
AIS is transparently passed through to the Customer
Interface.
RAI is transmitted to the Network Interface.
AIS, IDLE, NO SIGNAL, or AIS-CI is transmitted
to the Network Interface. This depends on the
provisioning of the "Customer LOS" option.
If "Send AIS/RAI when LOF detected" = Disabled,
then unframed DS3 payload is transparently passed
through to the Network Interface.
If "Send AIS/RAI when LOF detected" = Enabled,
then AIS-CI is transmitted to the Network Interface.
AIS-CI is transmitted to the Network Interface.
RAI-CI is transmitted to the Network Interface.
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