Cell Relay Archive

[gro_nospam_@org.chemie.uni-frankfurt.de]

In article <3720DE62.2695A5E@xedia.com>, Paul says...
>
>Nige wrote:
>> 
>> What is the theoretical maximum PCR on OC3?  And in practice, what
>> is a sensible value to use on an OC3-only network?
>
>351,849.  You get that by taking the raw bitrate (155.520 Mb/s)
>times 259/270 to account for the Sonet overhead, divided by the
>cell size.
Sounds a little low to me: Please correct me, but I would take 9 byte
of every OC-3c(!) frame and an additional byte for the path overhead.
Now that would leave me with 2340 byte per 1/8000s --> 353.207. Ok,
take some of for sig.-channel and ILMI and stuff... Our CELL-ACE-PLUS
(Cellware Berlin) tells me ... 
                +-------- Interface Setup  (ATM-IF1) ---------+
                |                                             |
                |  Max Available Bandwidth [cell/s]:  353208  |


Greetings,

Peter

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