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<TITLE>RE: Dialup congestion and winter weather (fwd)</TITLE>
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<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff size=2>Yes,
I was dialing into my own network.</FONT></SPAN></DIV>
<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff size=2>No, I
didn't make the connection to the weather.</FONT></SPAN></DIV>
<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff size=2>Yes,
it was LD from coast to coast, via AT&T calling card.</FONT></SPAN></DIV>
<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff size=2>Yes, I
did make the point that it was time-dependent. But, that could have easily been
a local-loop circuit dependency. Where, I got a circuit that wasn't
limited.</FONT></SPAN></DIV>
<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff size=2>I am
now back on the west coast and no longer in southern bell's region. However,
when I was there, I ran local loop tests that indicated that the problem was on
the near-end (NC). On the CA end, I consistantly get >33.6K connections. I
get similar results from CO, NV, WA, and OR metro areas (>33.6K, consistently
[I run both V.90 and 33.6K modem banks]). Only in southern bell's regions does
it drop to 14.4K (I was in Graham, NC).</FONT></SPAN></DIV>
<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=743263118-04012001><FONT face=Arial color=#0000ff size=2>Note:
In the past 15 years, most (90%) of the bandwidth problems, using modems, both
customer and corporate, that I have had, were "last mile" issues (IOW, local
loop, usually at the end-node).</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Christopher Grupe
[mailto:cgrupe@nortelnetworks.com]<BR><B>Sent:</B> Thursday, January 04, 2001
9:27 AM<BR><B>To:</B> Roeland Meyer; Roeland Meyer; 'multics@ruserved.com';
nanog@merit.edu<BR><B>Subject:</B> RE: Dialup congestion and winter weather
(fwd)<BR><BR></FONT></DIV>
<P><FONT size=2>Maybe I misunderstood the statement you made... Let me
paraphrase your original statement...</FONT> <BR><FONT size=2>During bad
weather, at certain periods of time you experience:</FONT> <BR><FONT
size=2>consistent 14.4Kbps connections using AT&T (ISP? or Long
distance?) Long distance from Coast to Coast??? </FONT><BR><FONT
size=2>Are you just dialing into your network?</FONT> </P>
<P><FONT size=2>Christopher Grupe</FONT> <BR><FONT size=2>Sr. Sales
Engineer</FONT> <BR><FONT size=2>Nortel Networks, Service Provider &
Carrier</FONT> <BR><FONT size=2>cgrupe@nortelnetworks.com</FONT> <BR><FONT
size=2>I speak for myself!</FONT> </P>
<P><FONT size=2>-----Original Message-----</FONT> <BR><FONT size=2>From:
Roeland Meyer [<A
href="mailto:rmeyer@mhsc.com">mailto:rmeyer@mhsc.com</A>]</FONT> <BR><FONT
size=2>Sent: Thursday, January 04, 2001 2:19 AM</FONT> <BR><FONT size=2>To:
Grupe, Christopher [DPARK:9234:EXCH]; Roeland Meyer;</FONT> <BR><FONT
size=2>'multics@ruserved.com'; nanog@merit.edu</FONT> <BR><FONT
size=2>Subject: RE: Dialup congestion and winter weather (fwd)</FONT> </P><BR>
<P><FONT size=2>1) I'm my own ISP, dialing into my own modem banks. I am
reasonably</FONT> <BR><FONT size=2>confident that I know what my own systems
are doing. They are not</FONT> <BR><FONT size=2>interacting as you
describe.</FONT> </P>
<P><FONT size=2>2) Local loop-back tests show that my servers see full
bandwidth, on their</FONT> <BR><FONT size=2>last mile. Similar testing on the
NC "last mile" show the bandwidth</FONT> <BR><FONT size=2>contraints.
Since the bandwidth is constrained on the "last mile", the LD</FONT> <BR><FONT
size=2>trunk behavior is irrelevent. Although, that was a probability, until I
did</FONT> <BR><FONT size=2>the tests.</FONT> </P>
<P><FONT size=2>3) You really wouldn't believe the telco attachment equipment
I carry in the</FONT> <BR><FONT size=2>*other* half of my lap-top case. On the
road, I can attach to the</FONT> <BR><FONT size=2>tin-cans-n-string
communications network, if I have to. Even if it does add</FONT> <BR><FONT
size=2>15 pounds to the carry weight<g>.</FONT> </P>
<P><FONT size=2>-----Original Message-----</FONT> <BR><FONT size=2>From:
Christopher Grupe [<A
href="mailto:cgrupe@nortelnetworks.com">mailto:cgrupe@nortelnetworks.com</A>]</FONT>
<BR><FONT size=2>Sent: Wednesday, January 03, 2001 7:56 AM</FONT> <BR><FONT
size=2>To: Roeland Meyer; 'multics@ruserved.com'; nanog@merit.edu</FONT>
<BR><FONT size=2>Subject: RE: Dialup congestion and winter weather
(fwd)</FONT> </P><BR>
<P><FONT size=2>He Sent, </FONT><BR><FONT size=2>>-----Original
Message----- </FONT><BR><FONT size=2>>From: Roeland Meyer [<A
href="mailto:rmeyer@mhsc.com">mailto:rmeyer@mhsc.com</A>] </FONT><BR><FONT
size=2>>Sent: Wednesday, January 03, 2001 12:53 AM </FONT><BR><FONT
size=2>>To: 'multics@ruserved.com'; nanog@merit.edu </FONT><BR><FONT
size=2>>Subject: RE: Dialup congestion and winter weather (fwd)
</FONT><BR><FONT size=2>> </FONT><BR><FONT size=2>> </FONT><BR><FONT
size=2>> </FONT><BR><FONT size=2>>That isn't the only issue. I've just
found that Southern Bell does</FONT> <BR><FONT size=2>bandwidth
</FONT><BR><FONT size=2>>limiting on their residential customers. Most
folks would never know the </FONT><BR><FONT size=2>>difference, but when
v.90 modems start consistantly connecting at 14.4K, or</FONT> </P>
<P><FONT size=2>>less, then I know that the telco is only allowing 32K per
voice channel </FONT><BR><FONT size=2>>(rather than the usual 64K). BTW,
that was using AT&T universal LD from </FONT><BR><FONT size=2>>Graham,
NC, to Livermore, CA. I only ever got full-speed late at night.
</FONT></P><BR>
<P><FONT size=2>Come on, </FONT><BR><FONT size=2>The ISP is not going to write
an init script for their modems to permanently</FONT> <BR><FONT size=2>have
them connect at 14.4. Telco's don't turn down the PCM rate on dial up's</FONT>
<BR><FONT size=2>to 32KBps either... Telco's (RBOC's) have a separate
(unregulated) ISP,</FONT> <BR><FONT size=2>which handles dial up traffic. The
regulated side is the switched side</FONT> <BR><FONT size=2>(voice switch)....
One has nothing to do with the other (usually union</FONT> <BR><FONT
size=2>workers on the regulated side, and non-union on the unregulated side).
So to</FONT> <BR><FONT size=2>prove your point, the dial side (ISP non-union)
would call the CO's and have</FONT> <BR><FONT size=2>the Switchman changed the
line card to an ADPCM (32Kbps) card at the switch,</FONT> <BR><FONT size=2>and
the ISP sets their modems to connect at 14.4Kbps. No way Jose!</FONT> </P>
<P><FONT size=2>Some CLEC's are running their line cards using ADPCM (32Kbps)
and over an</FONT> <BR><FONT size=2>ATM backbone. The RBOC's at this time are
still using typical PCM (64Kbps)</FONT> <BR><FONT size=2>per channel, for the
line cards (unless using BRI).</FONT> <BR><FONT size=2>The problem you may be
experiencing is with the inter switched trunks, or</FONT> <BR><FONT
size=2>coming in a span that has timing slips, Errored Seconds, and
severely</FONT> <BR><FONT size=2>errored seconds, etc. Especially if you are
going LD from NC to CA.</FONT> <BR><FONT size=2>Christopher Grupe
</FONT><BR><FONT size=2>Sr. Sales Engineer </FONT><BR><FONT size=2>Nortel
Networks, Service Provider & Carrier </FONT><BR><FONT
size=2>cgrupe@nortelnetworks.com </FONT><BR><FONT size=2>I speak for myself!
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