61200.130L1-1 FSU User Manual 7 3Chapter 7. Configuring the Network PortSignaling Type (SIGNAL)Set the signaling type option to match the network signalingtype.T391Set the time between polls to the frame relay network.N391Determine how many link integrity polls occur in between fullstatus polls.N392 and N393These parameters define the error threshold for the UNI formedby the FSU network port and the frame relay switch. If the errorthreshold is met, the signaling state status is changed to down,which indicates a service-affecting condition. This condition iscleared once N393 consecutive error-free events are received.N392 defines the number of errors required in a given eventwindow, while N393 defines the number of polling events ineach window.For example:If N392=3 and N393= 4, then if three errors occur within any fourevents the interface is determined inactive.The status of the connection can be viewed in the Status menuunder Network Port Signaling State. The status will return toactive again once the threshold is no longer exceeded.Remote FECN Notification (RFECN)Enable/disable the FSU to issue remote FECN (forward explicitcongestion notification). This feature ensures that a frame willbe generated in the reverse direction upon receiving a framewith the FECN bit enabled. This is a proprietary feature withADTRAN FSUs and can only be used with an ADTRAN FSU onboth ends of the virtual circuit.The network service provider should recommend the values entered intothe T391, N391, N392, and N393 fields.
