Description: On 4pDS1Aal1 and 4pE1Aal1 cards, this attribute specifies the size of the AAL1 receive segment reassembly buffer in bytes. On initialization the buffer is filled to a level determined by cellDelayVariationTolerance. Thereafter the buffer is emptied as TDM frames are transmitted, and is filled as ATM cells are received. If the buffer overflows, sufficient data is discarded to bring the level down to that set after initialization. The cause of a buffer overflow may be one or a combination of any of the following: cell- arrival-jitter, initialization with delayed ATM cells, or TDM clock difference or wander.

On 4pDS1Aal1 and 4pE1Aal1 cards, if this attribute is autoConfigure, the buffer size applied is equivalent to two times cellDelayVariationTolerance. A provisioned numeric value of bufferSize must be higher than the equivalent cellDelayVariationTolerance, plus an allowance of one ATM Cell for the quantization of data in cells, and an allowance, if applicable, for the ATM overheads of structured CES.

On MSA cards this attribute's value must be autoConfigure, to acknowledge that maximumBufferDelay is provisioned instead of this attribute.

Setting this attribute too low allows traffic with normal CDV to cause unnecessary loss of data on the service interface. Setting this attribute too high permits the buffer to introduce an unnecessarily high propagation delay.

VALUES (

0 = autoConfigure

)