Description: This attribute indicates the request currently being transmitted to the far end in the SONET/SDH line overhead K1 byte of the protection line. Requests are prioritized so that high priority requests preempt or block those with a lower priority. The possible requests, in order of priority from highest to lowest, are as follows.

lockoutOfProtection the working line is prevented from switching to the protection line under any circumstances due to an ProtectionLockout command being in effect.

forcedSwitch the line indicated by attribute nearEndRequestChannel has a Switch -force command in effect against it. Note that a signalFail on the protection line has higher priority than a forcedSwitch.

signalFail the line indicated by attribute nearEndRequestChannel is experiencing a signal failure (SF). Failures include LOS, LOF, received AIS-L, a signal BER exceeding 10-3, LOP, received AIS-P, LCD, or a locked Sonet, Sdh, or Path component. Note that a signalFail on the protection line has higher priority than a forcedSwitch.

signalDegrade the line indicated by attribute nearEndRequestChannel is experiencing a signal degradation (SD). For more information on the conditions required to declare and clear an SD please refer to the desription for attribute signalDegradeRatio.

A such that the signal BER exceeds the value provisioned in the signalDegradeRatio attribute, or is still exceeding

manualSwitch the line indicated by attribute nearEndRequestChannel has a Switch command in effect against it.

waitToRestore the protection line is active, provisioned attribute revertive is yes, and the working line has recovered from a Signal Fail or Signal Degrade. After the period defined by attribute waitToRestorePeriod the working line will automatically revert to being the receive active line and the request will change to noRequest.

reverseRequest the line indicated by attribute nearEndRequestChannel is active due to a request from the far end. This request is only applicable when the provisioned mode is bidirectional.

doNotRevert the protection line is active, provisioned attribute revertive is no, and either: (1) the working line has recovered from a signalFail or signalDegrade; or (2) a forcedSwitch or manualSwitch request has been cleared. The receive active line will not automatically revert to the working line.

noRequest the working line is active and no other requests are in effect.