H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 7/00 (2006.01) H04L 12/56 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2280261
In an asynchronous transfer mode (ATM) disassembler unit that is receiving ATM cells from an optical interface and converting data from these cells onto a constant bit rate (CBR) call, only a nominal predefined build out is defined for each optical interface. If an ATM cell is not received within the proper amount of time for the CBR call from the optical interface, the build out is automatically adjusted so that the build out is equal to the amount of delay that was experienced in receiving the next ATM cell for the call. Only the build out for the individual call that actually experienced the delay of the ATM cell is redefined. The other calls being handled by the optical interface are not effected by this automatic adjustment of the build out interval for the individual call. In addition, when an ATM cell is delayed for a particular call, the information that is transmitted for the call is the last PCM sample of the present ATM cell for that call. This requires in the case of a wideband call that consists of a frame subdivided into a plurality of channels that the frame must be repeated upon an ATM cell being delayed. When the delayed ATM cell is received, all PCM samples for the call are transmitted so that no PCM samples are discarded.
Chan Norman C.
Petty Norman W.
Kirby Eades Gale Baker
Lucent Technologies Inc.
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