Cell Relay Archive

[Scott Ferguson <ferguson@beavis.cos.agilent.com>]

Thomas Frieling <thomas.frieling@arcormail.de> wrote:

> You asked: "...how do people typically determine which cells are
> carrying which AAL?"
> The answer is: not at all! Why should they? The endsystem knows
> it, because it is configured manually or by signalling.

If "they" are switch designers debugging timing or firmware problems on
a new line card, and want to do protocol analysis on a Utopia bus or two
with their trusty logic analyzer. I suppose the line card designer can
shape traffic such that he/she knows which vp's/vc's are carrying which
AAL's by using a network analyzer for stimulus.

I work on software tools for decoding AAL's on a UTOPIA bus, being
probed by a logic analyzer.

So it's really a question of "how does a switch designer know which
AAL's are on which channels when debugging a design"; it's not a
question of how a network operator might allocate channels.

Your info is greatly helpful though! Is this forum mostly about
operator/installation issues, or is there often design talk going
on too?

Thanks,
Scott

-- 
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Scott Ferguson                                             Solely my opinions
Agilent Technologies                                    sferguson@agilent.com
Colorado Springs, CO                                        +1 (719) 590-2403