RE: [EFM] TDM circuit emulation
To all
interested in TDM over EFM:
I
didn't get hold of Howard, but I think this comes within appropriate use of this
reflector, particularly as it will get the out of scope topic of TDM over EFM
off this reflector.
I have
set up a yahoogroups reflector, to subscribe:
It is
a moderated group so you will get an email back saying do you really want to
join, then I get one (as moderator) to approve your application, then you get
one back saying your approved. This should keep spam off the group. The emails
will have banners in the footer. If there are enough takers I'll pay the $50 or
whatever to take the no banner option, other than that it is a 'free'
service.
Best
regards
Bob
Not as a big surprise BellSouth
also agrees.
B.F.
At 12:25 PM 12/12/01 -0700, Charles Cook
wrote:
>
>Qwest concurs with
SBC.
>
>Charles
>
>kmccammon@xxxxxxxxxxx
wrote:
>
>> Bruce and all,
>> SBC does consider that
next generation fiber access solutions should support
>> TDM such as
T1 and voice services. If TDM services must be done on a
>> separate
wavelength and not with the PHY below 802.3 MAC, the EFM optics
>>
group should pick a wavelength plan that can support wavelength
evolution.
>> -Kent
>>
>> Kent G.
McCammon
>> Access and Video Technologies
>> SBC Technology
Resources, Inc
>> 4698 Willow Road
>> Pleasanton, CA
94588
>> 925-598-1246
>> kmccammon@xxxxxxxxxxx
>>
This e-mail and any files transmitted with it are the property of SBC,
are
>> confidential, and are intended solely for the use of the
individual or
>> entity to whom this e-mail is addressed. If
you are not one of the named
>> recipient(s) or otherwise have reason
to believe that you have received this
>> message in error, please
notify the sender at 925-598-1246 and delete this
>> message
immediately from your computer. Any other use, retention,
>>
dissemination, forwarding, printing, or copying of this e-mail is
strictly
>> prohibited.
>>
>> > -----Original
Message-----
>> > From: Bruce Tolley [mailto:btolley@xxxxxxxxx]
>> > Sent: Sunday,
December 09, 2001 6:19 PM
>> > To: bob.barrett@xxxxxxxxxxxxxxxxxx;
stds-802-3-efm@xxxxxxxxxxxxxxxxxx
>> > Subject: RE: [EFM] TDM
circuit emulation
>> >
>> >
>>
>
>> >
>> > Bob:
>> > I would welcome a
presentation on this topic.
>> >
>> > If there is
serious interest in supporting this application,
>> > while I
think
>> > support for it is clearly outside the scope of the
project,
>> > one approach
>> > would not be to define
a PHY to support it but to leave wavelengths
>> > available so we
do not break the ability of other implementations to
>> > support
it.
>> >
>> > Bruce Tolley
>> > Cisco
Systems
>> >
>> > At 10:03 PM 12/9/2001 +0000, Bob
Barrett wrote:
>> >
>> > >Jangrai
>> >
>
>> > >I am interested in TDM over EFM and over IP,
however, so far
>> > EFM has ruled
>> > >TDM as out
of scope or implementation specific.
>> > >
>> >
>It is one thing to run TDM in packets, it is actually easier
>>
> to run TDM in
>> > >side bands, but that would mean
changing the PHY. I was going to do a
>> > >presentation on
this in Portland but I pulled it because
>> > there appeared
to
>> > >be zero chance of changing the PHY at that point. If
the
>> > group adopts OAM
>> > >other than in
frames the PHY will need to be changed, and at
>> > that
time
>> > >Pandora's Box will be open, so to speak, and I will
come
>> > back in with my
>> > >presentations. May
as well be hung for a sheep as a lamb.
>> > I.E. if we
are
>> > >changing the PHY for OAM we may as well change it to
add
>> > side band TDM.
>> > >
>> >
>In all packet networks circuit emulation as frames or IP is
>>
> needed in the
>> > >metro / back-haul. Side band TDM won't
cut it.
>> > >
>> > >In traditional networks
circuits can be done as they are
>> > today, or at
worst
>> > >they need to be carried in the last mile / first
mile along
>> > side the packet
>> > >traffic, to
where the SONET / SDH metro handles them in the
>> >
back-haul.
>> > >
>> > >I have technology for
both that I would be willing to
>> > contribute to EFM
if
>> > >the group were to feel that that was a desirable
enhancement
>> > to the EFM
>> >
>specification.
>> > >
>> > >There is
certainly new silicon for EPON, probably for
>> > outside plant
1GE, and
>> > >probably for 10Base4 copper. However, I see
the
>> > applicability being EPON and
>> > >1GE
only, unless there is a benefit in changing the T1/E1
>> > from
its current
>> > >copper coding to something else to reduce
cross-talk on the
>> > copper PHY.
>> >
>
>> > >Hugh / Howard - any comment on this from the copper
track please?
>> > >
>> > >Best
regards
>> > >
>> > >Bob
>> >
>
>> > > > -----Original Message-----
>> >
> > From: owner-stds-802-3-efm@majordomo.ieee.org
>> > >
> [mailto:owner-stds-802-3-efm@majordomo.ieee.org]On Behalf
Of ???
>> > > > Sent: 09 December 2001 15:39
>>
> > > To: stds-802-3-efm@xxxxxxxxxxxxxxxxxx
>> > >
> Subject: [EFM] TDM circuit emulation
>> > >
>
>> > > >
>> > > >
>> >
> > Hello,
>> > > >
>> > > > What do
you think of T1/E1 and T3/E3 circuit emulation over EFM?
>> > >
> Some vendors have announced TDM integration over IP.
>> >
> > It might be some problematic in cost/performance due to cost
of
>> > > > delay/jitter compensation. And how about
supporting resiliency?
>> > > >
>> > > >
Jangrai Roh
>> >
>
Brian Ford
BellSouth Telecommunications
Science and Technology
SMTS - Exploratory Development
ford_b@xxxxxxxxxxxxxxxxx
Phone +1 (404) 332-2217
FAX +1 (404) 529-8025