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Re: What vexes VoIP users?
by Jay Ashworth 01 Mar '11

01 Mar '11

----- Original Message ----- > From: "Owen DeLong" <owen(a)delong.com> > > TTBOMK, that isn't *quite* true, yet, Owen. > > > > The only US carrier with LTE deployed is VZW, and their only > > *handset* with LTE is the not-yet-quite-shipped HTC Thunderbolt... > > > That's the US market. We are, as usual, traditionally well behind the > rest of the world. > > > and it is my understanding that their first generation release of > > handsets will > > *not* be doing PSTN voice as VoIP over the LTE data connection; > > they'll be > > dual-mode handsets, using traditional (IS-95? IS-136?) CDMA voice on > > a > > separate RF deck. The two reasons I've heard have to do with battery > > life > > and the immaturity of the protocol stack or its implementations. > > > Sad. There are definitely LTE-data-only VOIP handsets in other > deployments. Of course. Silly me. :-) Cheers, -- jra

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Re: What vexes VoIP users?
by Jay Ashworth 01 Mar '11

01 Mar '11

----- Original Message ----- > From: "Owen DeLong" <owen(a)delong.com> > This "no intermediate gear" term, it does not mean what you think it > means... > > Loading coils, Bridge-Taps, WDFs, Protection Blocks, etc. all could > be classified as intermediate gear. Many of these things have been > the bane of DSL installations, so, you cannot claim that they have > no effect on the circuit. Sure. But they're not really "gear" in the meaning in which we use that term, and they do not add "complexity" to it in the meaning in which *I* was using that term. There are no batteries, CPUs, configuration files, etc, on any of those items. I will grant that thing like TR-303 RSUs do introduce those complexities, but they're generally treated as part of the CPU, IME, and engineered and maintained that way, and they're not really all *that* configurable either, as I understand them. > > When I'm bringing 31 T-spans into my call center, that extra > > complexity is easily justifiable. > > > > For grandma's phone? Not so much. > > For grandma, probably not. For myself, I like having a phone on my > laptop that works just about any where in the world and allows me to make > local calls in the US. As do I. And we do. Was this subthread not about whether VoIP was *generically* ready to replace the PSTN's present last-mile provisioning? Cheers, -- jra

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Sunday Funnies: Using a smart phone as a diagnostic tool
by Jay Ashworth 28 Feb '11

28 Feb '11

Do you have a smartphone? Blackberry? iPhone? Android? Do you use it as a technical tool in your work, either for accessing devices or testing connectivity -- or something else? If so, what kind of phone, and what (if you don't mind letting on) are your magic apps for this sort of work? (My motivation? Well, um, Lee, I'm looking at buying an HTC Thunderbolt, if everyone can get their thumbs out, and I want to get a feeling for the lanscape, if you'll pardon the pun. :-) Cheers, -- jra

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Re: Mac OS X 10.7, still no DHCPv6
by Paul Vixie 28 Feb '11

28 Feb '11

there are two replies here. --- Christopher Morrow <morrowc.lists(a)gmail.com> writes: > ..., what's the harm in dhcpv6? (different strokes and all that) only the egos and reputations of those who said that stateless autoconf was all ipv6 needed. (which is a small price to pay, according to me.) --- "Dobbins, Roland" <rdobbins(a)arbor.net> writes: > On Feb 28, 2011, at 10:47 AM, Steven Bellovin wrote: > >> Also don't forget privacy-enhanced addresses. > > Yes, which have extremely negative opsec connotations in terms of > complicating traceback. /64 csma subnets with low order 64 bits controlled by infectable pc's means we'll be blackholing by /64 when we blackhole in ipv6. it's no big deal. -- Paul Vixie KI6YSY

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Sunday Funnies: Using a smart phone as a diagnostic tool
by Atticus 28 Feb '11

28 Feb '11

I use Android phones, mostly for remote administration. SSH using ConnectBot. If you want a really durable phone, with the option of a little bit of additional functionality, I would take a Motorola Droid 1, throw CyanogenMod on it with a p3droid kernel. The phone itself can survive 3ft falls @ 30 mph (proven myself on accident), the keyboard is very useable, and overall is an amazing phone. You can also use a fair number of command line tools, and add your own statically compiled tools, or dynamically compiled with a bit more work. On Feb 27, 2011 9:03 PM, "Jay Ashworth" <jra(a)baylink.com> wrote: Do you have a smartphone? Blackberry? iPhone? Android? Do you use it as a technical tool in your work, either for accessing devices or testing connectivity -- or something else? If so, what kind of phone, and what (if you don't mind letting on) are your magic apps for this sort of work? (My motivation? Well, um, Lee, I'm looking at buying an HTC Thunderbolt, if everyone can get their thumbs out, and I want to get a feeling for the lanscape, if you'll pardon the pun. :-) Cheers, -- jra

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DSL/Fiber/MetroE Options for Fort Worth, TX
by Bobby Lacey 28 Feb '11

28 Feb '11

Hi All, Looking for a provider/contact of a dsl circuit, MetroE, or other >8mbps alternative in the Fort Worth, TX area. Specifically this will be used as internet access for a conference at the Fort Worth Convention center at 1201 Houston St Fort Worth, TX. Sorry for the bandwidth, but we are desperately looking for a provider. Please respond offlist. Thank you, Bobby KF4GTA

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World IPv6 Day (was: Mac OS X 10.7, still no DHCPv6)
by Randy Bush 28 Feb '11

28 Feb '11

Me: >>> NOC: are you running a macintosh? >>> User: yes, how did you guess? >>> NOC: because it is broken. get vista. btw, i run macosx 10.6.6 Some Clueless Mac Fanchild: >> While I'm as big a fan of IPv6 as anybody, I think in a comparison of >> relative brokenness, Mac comes out quite favorably compared to Vista >> in spite of their DHCPv6 deficiencies. Tore: > Absolutely not. Mac OS X does not do proper source address selection > according to RFC 3484. That makes it do things like preferring the use > of link-local IPv6 addresses when connecting to global dual-stacked > destinations, which of course won't work - as a result a 75 second > long timeout is incurred for every single outgoing TCP connection. i have hope for lion, and maybe even a patch for 10.6. this stuff just has to be fixed before world ipv6 day. > My guess is that about 70-80% of the users calling Randy and others to > report problems on «World IPv6 Day» will be running Mac OS X. sad to say, probably not. the biggest problem here in japan is ntt [0]. they provide no global v6 [1], but an ipv6 walled garden against which users will bang heads when they get a quad-a. they own the last km, provide the cpe, and own the government. so we have to use them for transport. our customers will hit their broken implementation and call us. sweet! the isps, in cooperation with ntt, are trying to sort this problem before it occurs. but it is not pretty and there is no good solution. randy --- [0] - not the ntt which provides layers three and above, and even ipv6 in the states and much of asia except japan. this is ntt the telco semi-monopoly local bearer provider in japan and their ngn implementation. [1] - apocrypha of japan being ipv6 rich are utter bs.

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Re: SLA for voice and video over IP/MPLS
by Tim Jackson 27 Feb '11

27 Feb '11

For video, the SCTE 168 doc covers this.. (first hit on google) Its fairly strict, but in depth. On Feb 24, 2011 6:12 PM, "Diogo Montagner" <diogo.montagner(a)gmail.com> wrote:

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NTT as a service provider in the US
by powerzone7＠gmail.com 27 Feb '11

27 Feb '11

Anyone have any thoughts on NTT as a service provider in the US ? Anyone currently or previously using them please chime in. thank you

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Weekend Gedankenexperiment - The Kill Switch
by Jay Ashworth 27 Feb '11

27 Feb '11

An armed FBI special agent shows up at your facility and tells your ranking manager to "shut down the Internet". What do you do when you get home to put it back on the air -- let's say email as a base service, since it is -- do you have the gear laying around, and how long would it take? Do you have out-of-band communications (let's say phone numbers) for enough remote contacts? Cheers, -- jra

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