Yes, I was dialing into my own network. No, I didn't make the connection to the weather. Yes, it was LD from coast to coast, via AT&T calling card. 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. 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). 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). -----Original Message----- From: Christopher Grupe [mailto:cgrupe@nortelnetworks.com] Sent: Thursday, January 04, 2001 9:27 AM To: Roeland Meyer; Roeland Meyer; 'multics@ruserved.com'; nanog@merit.edu Subject: RE: Dialup congestion and winter weather (fwd) Maybe I misunderstood the statement you made... Let me paraphrase your original statement... During bad weather, at certain periods of time you experience: consistent 14.4Kbps connections using AT&T (ISP? or Long distance?) Long distance from Coast to Coast??? Are you just dialing into your network? Christopher Grupe Sr. Sales Engineer Nortel Networks, Service Provider & Carrier cgrupe@nortelnetworks.com I speak for myself! -----Original Message----- From: Roeland Meyer [ mailto:rmeyer@mhsc.com <mailto:rmeyer@mhsc.com> ] Sent: Thursday, January 04, 2001 2:19 AM To: Grupe, Christopher [DPARK:9234:EXCH]; Roeland Meyer; 'multics@ruserved.com'; nanog@merit.edu Subject: RE: Dialup congestion and winter weather (fwd) 1) I'm my own ISP, dialing into my own modem banks. I am reasonably confident that I know what my own systems are doing. They are not interacting as you describe. 2) Local loop-back tests show that my servers see full bandwidth, on their last mile. Similar testing on the NC "last mile" show the bandwidth contraints. Since the bandwidth is constrained on the "last mile", the LD trunk behavior is irrelevent. Although, that was a probability, until I did the tests. 3) You really wouldn't believe the telco attachment equipment I carry in the *other* half of my lap-top case. On the road, I can attach to the tin-cans-n-string communications network, if I have to. Even if it does add 15 pounds to the carry weight<g>. -----Original Message----- From: Christopher Grupe [ mailto:cgrupe@nortelnetworks.com <mailto:cgrupe@nortelnetworks.com> ] Sent: Wednesday, January 03, 2001 7:56 AM To: Roeland Meyer; 'multics@ruserved.com'; nanog@merit.edu Subject: RE: Dialup congestion and winter weather (fwd) He Sent,

-----Original Message----- From: Roeland Meyer [ mailto:rmeyer@mhsc.com <mailto:rmeyer@mhsc.com> ] Sent: Wednesday, January 03, 2001 12:53 AM To: 'multics@ruserved.com'; nanog@merit.edu Subject: RE: Dialup congestion and winter weather (fwd)

That isn't the only issue. I've just found that Southern Bell does bandwidth limiting on their residential customers. Most folks would never know the difference, but when v.90 modems start consistantly connecting at 14.4K, or

less, then I know that the telco is only allowing 32K per voice channel (rather than the usual 64K). BTW, that was using AT&T universal LD from Graham, NC, to Livermore, CA. I only ever got full-speed late at night.

Come on, The ISP is not going to write an init script for their modems to permanently have them connect at 14.4. Telco's don't turn down the PCM rate on dial up's to 32KBps either... Telco's (RBOC's) have a separate (unregulated) ISP, which handles dial up traffic. The regulated side is the switched side (voice switch).... One has nothing to do with the other (usually union workers on the regulated side, and non-union on the unregulated side). So to prove your point, the dial side (ISP non-union) would call the CO's and have the Switchman changed the line card to an ADPCM (32Kbps) card at the switch, and the ISP sets their modems to connect at 14.4Kbps. No way Jose! Some CLEC's are running their line cards using ADPCM (32Kbps) and over an ATM backbone. The RBOC's at this time are still using typical PCM (64Kbps) per channel, for the line cards (unless using BRI). The problem you may be experiencing is with the inter switched trunks, or coming in a span that has timing slips, Errored Seconds, and severely errored seconds, etc. Especially if you are going LD from NC to CA. Christopher Grupe Sr. Sales Engineer Nortel Networks, Service Provider & Carrier cgrupe@nortelnetworks.com I speak for myself!