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RE: [EFM] RE: [EFM-OAM] Performance monitoring, installation, trouble shoot ing.


As long as you are using two separate pipe, why not make one of them a 
fixed bandwidth at the physical layer?  Then you would not need the 
additional complexity of the TDM over whatever.

Thank you,
Roy Bynum

At 09:45 PM 1/28/2002 +0000, Bob Barrett wrote:

>Like you, I am familiar with one implementation of TDM over layer two. I
>guess now I know of another one.
>The fine tuning is required in the back haul not the last / first mile. One
>has to keep the time critical traffic away from the internet traffic on
>pipes with statistical gain. The easiest way is two pipes, one with gain and
>one without.
>It's an issue of back haul network architecture rather than tuning.
>Best regards
>-----Original Message-----
>[]On Behalf Of Ron
>Sent: 27 January 2002 19:16
>To: carlosal@xxxxxxxxxxxxxxxxxx
>Cc: Bob Barrett;
>Subject: Re: [EFM] RE: [EFM-OAM] Performance monitoring, installation,
>trouble shoot ing.
>Hi Carlos,
>I'm familiar with one implementation where TDM over packet
>(IP over Ethernet) works reliably. It is feasible and
>"low complexity" to deliver tightly bounded timing
>synchronization for TDM streams without the need
>for "fine tuning" using standard PHYs.
>--ron jeffries
>   Occam Networks, Inc.
>carlosal@xxxxxxxxxxxxxxxxxx wrote:
> >
> > Bob Barret said:
> > > Servicing 32 customers with time critical data e.g. T1 or POTS (leave
> > > aside video for now), requires a scalable TDM like mechanism.
> >                                    ^^^^^^^^
> > I think you nailed the problem. Making TDM-over-packet emulation work for
> > few individuals is one thing; making it your main delivery mechanism for
> > every voice line is another. Currently available TDM-over-packet solutions
> > require fine tuning and care to work well (don't look hard or it will
> > break). To make it scalable, it has to be (a) easy to provision and (b)
> > bulletproof under load. Current solutions fail to meet both criteria.
> >
> > Carlos Ribeiro
> > CTBC Telecom