Interesting People mailing list archives
and VoIP -- and Telecommunications in general
From: Dave Farber <dave () farber net>
Date: Tue, 16 Dec 2003 12:11:52 -0500
Delivered-To: dfarber+ () ux13 sp cs cmu edu Date: Tue, 16 Dec 2003 12:01:16 -0500 From: Bob Frankston <rmfxixB1 () bobf frankston com> Subject: RE: [misc] How IP Telephony Works -- and Circuit Switching vs Packet Switching and VoIP -- and Telecommunications in general To: "'John F. McMullen'" <observer () westnet com> Cc: 'Dave Farber' <farber () cis upenn edu>, 'Declan McCullagh' <declan () well com> Focusing on cost misses the real point about IP telephony -- it's all about defining telephony at the edge and not a service provided by others. Even Vonage currently acts more like a Telco by providing a closed service. As long as a third part is involved in peer-to-peer IP telephony it is still old-style telephony. The third party should only be involved when bridging to and from the old PSTN. Skype plus bridging gets interesting. It's no surprise that the discussion is framed in terms of old style telephony but it confuses the issue. I write about this and related issues in http://www.frankston.com/?name=tvv -- it's as much about morality as technology. Incidentally, my Verizon land lines went out yesterday but I was able to redirect the calls to my Vonage line until they were repaired. For a while DSL over the same wires continued to work! But I use a dual WAN (Xincom) router so I have backup connectivity via cable modem. Of course I called repair on my Vonage line. For now cell phones also act as a backup but the very idea that we care about wired vs wireless is part of the legacy of telephony as a service rather than just an application built on connectivity. -----Original Message----- From: John F. McMullen [mailto:observer () westnet com] Sent: Tuesday, December 16, 2003 11:25 To: johnmac's living room Cc: CardinalFarley List; Dave Farber; Declan McCullagh Subject: [misc] How IP Telephony Works -- and Circuit Switching vs Packet Switching and VoIP -- and Telecommunications in general This is, IMNSHO, a very good link, providing a clear definition of the use of the Internet as a telephone -- one caution: when going from page to page, be careful that you hit "Next" (below the bottom of the page) rather than the "Compare Prices" or "Super Deals" buttons. There are diagrams, etc. on the pages that add to the explanation. As I've mentioned before, I (and a few friends, such as Dr. Merlino) use Vonage and have been very happy with it. Some of my students are using the Cablevision service and have also been very happy with it. Both run $34.95 a month for unlimited local and long distance calling (there is some other initial expense if the user wants to have multiple extenstions; I'm using a Panasonic wireless base station with multiple cordless phones -- up to 8 -- around the house and am also very happy with that, ---------- Forwarded message ---------- From: Refdesk Link of the Day <linkmailer () csauto com> Subject: Refdesk Link of the Day:How IP Telephony Works Today's Refdesk Link of the Day is: How IP Telephony Works at: http://electronics.howstuffworks.com/ip-telephony.htm Forget about those "bargain" long-distance carriers -- IP telephony lets you make free long-distance phone calls using your computer. It's essentially a phone network based on Internet protocol, a pretty cool use of the Internet infrastructure that already connects computers all over the world. Help Support Refdesk http://www.refdesk.com/support.html ************************************************************************ "When you come to the fork in the road, take it" - L.P. Berra "Always make new mistakes" -- Esther Dyson "Be precise in the use of words and expect precision from others" - Pierre Abelard "Any sufficiently advanced technology is indistinguishable from magic" -- Arthur C. Clarke "Bobby Layne never lost a game. Time just ran out." -- Doak Walker John F. McMullen johnmac () acm org ICQ: 4368412 Fax: (603) 288-8440 johnmac () cyberspace org http://www.westnet.com/~observer
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- and VoIP -- and Telecommunications in general Dave Farber (Dec 16)