Specifications

TOKEN RING OVERVIEW
2-24
Remove Ring Station (REMOVE)
The CRS transmits this frame to a certain station when unconditional
removal of that station is required.
Report Error (ERROR)
Any station transmits this frame to the REM when a timer expires.
Report Active Monitor Error (ACTIVE-ERROR)
When a Purge or AMP is received by the AM that it did not transmit, or
when a Claim Token is received the AM transmits this frame to the REM.
Report Neighbor Notification Incomplete (NN-INCMP)
Transmitted to the REM, this frame indicates that a station has not
received from its upstream neighbor during the Neighbor Notification
process.
Report New Active Monitor (NEW-MON)
When a station has become the AM it transmits this frame to the CRS to
notify it of a new AM.
Report Ring Station Addresses (RPT-ADDR)
This frame is a response to a Request Ring Station Attachment MAC
frame.
Report Ring Station State (RPT-STATE)
This frame is a response to a Request Ring Station State MAC frame.
Report SUA Changes (SUA_CNG)
When an upstream neighbor address change is made as a result of the
Neighbor Notification process, this frame is sent to the CRS.
Request Initialization (RQ_INIT)
This frame is transmitted by the station to the RPS, after a successful Ring
Insertion process, indicating that a station has entered the ring and is
ready to accept parameters from the RPS or the CRS.
Request Ring Station Address (RQ-ADDR)
This frame is transmitted by any of the management servers to a station. It
is a request for addresses recognized by that station.
Request Ring Attachments (RQ-ATTCH)
This frame is transmitted by any of the management servers to a station. It
is a request for information of the state of that station.