ADTRAN 1200312L5 User Manual

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ADTRAN 1200312L5 User Manual Manual pdf 23 page image

Chapter 3. Operation61200312L1-1 VCOM Module User Manual 3-9USAGE T IME Read Security: 5Measures the total elapsed time that a VoFR device has the status BUSY.The time is expressed with millisecond precision. Available VoFR devicesare assigned new connections using a round-robin technique where allother available VoFR devices must be used before a given device is assigneda new connection. This scheme tends to use allVoFR devices evenly. If agiven device shows significantly less elapsed usage time than other VoFRdevices on the same VCOM Module, that device may be faulty.ATLAS FRMS Read Security: 5(ATLAS Frames) Counts every frame that theATLAS 550 sends to orreceives from the VoFR device. This count indicates activity but does notindicate the actual amount of frame relay data exchanged. The total numberof frames handled by theVoFR device is given by the following equation:See the ATLAS D ROP definition below for a description of the term:ATLAS DROP Read Security: 5Counter-measures each frame that is dropped or discarded during commu-nication between the the ATLAS 550 and the VoFR device; i.e., ATLASFrames Dropped. The exchange protocol is designed so that no framesshould be discarded during this operation. A consistent pattern of droppedframes by a given VoFR device may indicate a faulty VoFR device or anoverloaded ATLAS 550 system.VCOM F RMS Read Security: 5Counts every frame successfully sent to or received from theATLAS 550system controller. This is an indication of activity but does not indicate theactual amount of frame relay data exchanged. The following equation givesthe total number of frames handled for this VoFR device by theVCOM Module:See the VCOM D ROP definition below for a description of the term:Frames ATLASTotal Frames ATLAS Frames ATLASDropped+=Frames ATLASDroppedThe discarded frame indicated by this value does not reflectnetwork-level performance management, but indicates ananomalous condition within the ATLAS 550 unit. Persistentlydropped frames may indicate a problem with the ATLAS 550 unitor the VCOM Module.Frames VCOMTotal Frames VCOM Frames VCOMDropped+=Frames VCOMDropped