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Cell Relay Retreat>List Archive>month:1999-Jan> msg00154



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Re: AAL2 HEC calculation

  • From: Phil Guillemette <pguillem74@hotmail.com>
  • Date: Tue, 26 Jan 1999 14:22:42 GMT
  • Newsgroups: comp.dcom.cell-relay
  • Organization: Magma Communications Ltd.


Hi,

I'm not an expert with respect to HEC calculations, but if I am not
mistaken, the HEC is calculated the same way no matter what AAL is being
used.  It only has to do with the other 4 octets in the ATM cell header.

Phil

Jouko Uimonen wrote:
> 
> Hi !
> 
> I'm looking for a reference to compare my HEC calculation over the AAL2 CPS
> Packet Header.
> 
> ITU-T gives an example in I.363 specification for the AAL5 CRC calculation,
> are there similar available for the AAL2 HEC ?
> 
> Thanks
> 
> Jouko Uimonen