Cell Relay Archive

["Dominic Richens" <dominic.richens@sympatico.ca>]

<hi_spede@yahoo.com> wrote:
> Are there any readers involved in implementing I.610(02/99) on ATM
> products?

been there, done that, got the T-shirt with the Verilog on it...

> We are updating a product to use loopback IDs and some of the
> description in I.610 seems incomplete.

It is vague, as most ITU-T specs are specific on protocol details that
affect interworking, but details that influence operational aspects are left
"as an exersize to the reader".

> For instance para 10.2.1
> describes a Defect Type field for use in AIS/RDI cells, but there is
> no definition of what the codes should be.  I see that it says that
> this function is optional, but does that mean we can make up what ever
> codes and types we want?

Pretty much.  Come up with something good and maybe we'll all add it to the
next version of the standard.

> Has anyone actually implemented this?  I
> presume that the Defect location field should use the same value as
> the LLID for the node, but it I.610 doesn't state this specifically.

It doesn't have to be, I've seen a couple of vendors tack on some sort of
port Id to help in fault isolation.

cheers!