Cell Relay Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: Voice over AAL2, Why?
Rodney wrote: > > The beauty of AAL2 is that 44 bytes is perfect for PCM voice. You can > perfectly fill a cell with traffic, so there is minimal overhead and > latency. With AAL5/VoIP, you must must either add huge amounts of > latency or incur huge amounts of overhead. AAL2 offers toll quality > voice today. > So what you are saying is that your AAL2 layer processing is optimized for 44 byte payloads (PCM), this simplifies the AAL2 processing significantly so that it is only marginally more complicated than say AAL1. Which is naughty in that you are not allowing variable payloads but I understand why you are doing it because the processing of AAL2 is enormous. How do the standards people react to optimizations of this sort? > Rodney Boles > Jetstream Communications > > Sent via Deja.com http://www.deja.com/ > Before you buy. begin:vcard n:Foster;John Paul tel;cell:07977 298347 tel;fax:+44 1506 595959 tel;work:+44 1506 595342 x-mozilla-html:TRUE org:Cadence Design Systems;Datacomms / Telecomms version:2.1 email;internet:jpfoster@cadence.com title:Consulting Engineer adr;quoted-printable:;;1 The Alba Centre=0D=0ARosebank;Livingston;West Lothian;EH54 7HH;Scotland x-mozilla-cpt:;10432 fn:John Paul Foster end:vcard
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