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What VoIP Is Actually Good For
gManZboy writes "One of the things that's bothered me about VoIP is that other than so-so quality phone service at a cheap price, what's the big deal? I mean so you can now deliver voice mail into e-mail because it's all IP packets, does that mean I should ditch my telecom investment. Well in part 3 of Queue's special report on VoIP (here's part 1, part 2) two authors from Bell Labs help explain actually useful things you might do. Now I get it."
VoIP
What is it good for
Absolutely nothing
VoIP
What is it good for
Absolutely nothing
VoIP is something that I despise
For it means destruction of telephone lines
For it means tears in thousands of executives' eyes
When their trucks go out to remove their telephone lines
If you run a modem over VOIP, you can then dial into the Internet without a phone line. Now any computer with a broadband connection can surf the web in luxury at an amazing 56kbps!
Many telcos are using VoIP in parallel with their PSTN backbones, and this is ok - most users don't even notice this behind the scenes VoIP application.
When it comes to services to end users, except for companies like Vonage and a few similar ones there's a huge gap. For example I've subscribed to Stanaphone just to find out that my account disappeared simply because I didn't use it for a month. Well, there's no way these companies can compete with operators if they keep this kind of policies in place. Could you imagine if you're enjoying a 45 days holiday in Europe (or in New Zealand, which is really cool!), and when back home find out your phone doesn't work anymore because of this kind of policy? No POTS operator would do this...
We've put a VoIP unit in our place in the Carribean and it allows guests who are mostly from the US, to make (effectively) free calls back home - something that would be very expensive using the regular telephone system.
Having used Vonage for several months I can say I am very pleased with their service and the quality of the calls. Before Vonage my only phone was a SprintPCS phone. When I got Vonage and called family/friends to tell them about a new number most of them commented how much clearer it was compared to the PCS phone I usually call them on.
;)
The only time I have had a 'problem' was when I was downloading some files on bittorrent AND playing FFXI Online and received a phone call. There was a slight echo audible on my end.
I have actually convinced my father and two friends to ditch the local phone company and get VOIP. They are also very pleased with the service and money they have saved, which equals free months of phone service for me!
-"so-so quality"
This is simply not true. Voice packets are given the highest priority across the network. If a voice packet does not make it to the destination, it is not resent. If the proper investment is made (you need newer switches and equipment) and the configuration is correct, it really does work great. I think it is ideal for an office with 30 people, especially if it is in a rural area where you may be paying a lot for a frame relay circuit or other connection. This setup can be done using Avaya VoIP phones in just a few hours and is very reliable!!
http://tomgould.com/
Advantages:
Disadvantages
I believe that VoIP and any other "permanent" phone installation is going to pass and mobility will be more important to most people.
I installed Skype the other day (it's apparently developed by the people who originally developed Kazaa, using "peer to peer" technology, however that works). Anyway, it installed without fuss and works from behind a firewall without me having to open ports. I haven't tried skypeout yet, only skype to skype, but hey, I'm chatting to my friends in the states for free, and the quality is much better than a long distance phone call. Thusfar, I'm impressed.
"The dew has clearly fallen with a particularly sickening thud this morning"
When you need cover fire to plant a frag on some fool's camp spot, that crappy voip over is 100X better than typing.
You don't have to be smart to use a Mac, you just have to be smart enough to buy one
under peak hours, the lag has got to suck...
Lag is an artifact of an poorly provisioned network. If you had end-to-end, trusted QoS, lag would never be noticable. Every important packet - voice, game, etc - would be delivered on time, and all the background "junk" - web, e-mail, BitTorrents - would fill the gaps between the important stuff that can't tolerate delay.
The trouble with VoIP is the dependence on QoS, which most third parties can't provide. I've been tempted to try Speakeasy Voice, since they should be capable of setting good QoS for the VoIP service. But I still haven't checked pricing to see if it would actually save me money over traditional phone & DSL.
Telco company: Hello, welcome to genericom, how may i assist you. Me: My pho....pho....ne.... is laa...a..aaaa....a..g.... Telco company: Whats that sir, I cant quite understand you. Me: My god....amn....phon...is....lagg... Telco Company: Sir, your going to have to speak more clearly...
does that mean I should ditch my telecom investment.
Don't you think question marks are just the worst.
I mean really, who actually bothers anymore.
However, I've had others swear by their VoIP. It seems to me that there is still just too many variables in the IP infrastructure for the experience of VoIP to be uniform. Not to mention the issues with power outages, 911 service, and the like.
Another thing to note is that having voice mail sent to email is not a feature of VoIP per sey. We are currently implementing an email system that has this ability, given that you have the right voice mail equipment. While there are some features that VoIP does offer that can't be done with POTS and appropiate equipment, many of the features being touted as "VoIP only" features can be done with POTS.
That said, about 5 years ago I was involved in a project to roll out VoIP in a new building (about 300 people, a call center of about 10 stations included). We used Cisco equipment and had two 24 channel trunks come in from POTS (one for local, one for long distance). Once it was up and running, the sound quality was nearly as good as POTS - we did have a slight echo once in a while, but other than that, it was great. We, of course, had complete control over the network, so doing QoS and stuff like that with voice packets was easy.
VoIP, if done right, can be nearly as good as POTS in terms of sound quality, if not better. But given all the variables (phone, DSL/Cable router, your ISP, the POTS/Internet interface, etc), there are just too many places that can cause quality to suffer. And the problem becomes worse if you try and use a fax machine over a VoIP line, which doesn't have a high tolerance for packet delay.
We're doing it for cost and flexibility:
1) No telephones == more desk space
2) No telephones == less money wasted on telephone maintenance
3) No telephones == less money wasted on phone line maintenance (only run one network instead of two)
4) IP == If you log in to VPN you can get calls transferred to you at home
5) VoIP == cheap long distance
6) Other features -- automatic call recording, easy ability to script call-ins, etc.
7) PBX Box ---- WAAAAAY cheap ($1,500 for a build-it-yourself asterisk solution vs $10,000+ for a traditional PBX solution)
Engineering and the Ultimate
I am a Vonage customer and use it as my primary line. Not only can you get voice mails delivered to email (great when travelling), but you can, for an additional $4.99/month get a line that is local to someone that calls you a lot, so they can make toll-free (local) calls, even if you're in New York and they are in California.
The feature I like best is that, free of charge, I have my cell phone ring anytime my home phone rings. That way, when I'm away, I still get all my home calls, and don't have to give out my cell number to everyone. This feature can be used for simultaneous ringing on any other number, or it can forward it to another number after a certain number of seconds without answer on the first line. You can turn the feature on/off and the change takes effect almost immediately.
Most of all, all the extras that you pay for with normal phone are automatically included in the Vonage plan. I pay $25 a month for all my phone needs (that are non-cell), and that's a lot better than my old SBC/MCI pairing I used to use.
I don't really notice bad voice quality, but I took a lot of time to set up my Vonage box *behind* my firewall, but then forwards all the ports necessary to have it manage the connection properly for voice-quality. For a more no-brainer setup, just route your connection to the Vonage box first, then to your router.
When VoIP is deployed on a network that is properly configured with QoS and you have adequate bandwidth, voice quality is not an issue. When it is done right you can get voice, video and data all on the same circuit without any loss of quality. I manage 6500+ IP phones in locations in a half-dozen states and everything work just fine. It all comes down to making sure you have the bandwidth and QoS, which is something that would won't find on your average home cable or DSL connection.
The days of high cost international calls are limited. Here in New Zealand I can use my Vodafone mobile to call various countries (Australia, Canada, US, UK, Ireland) at the same rate as a local call.
So far, VoIP's main attraction has been lower cost calls. THis won't last and VoIP will have to find a better way to justify its existence.
Engineering is the art of compromise.
> If you had end-to-end, trusted QoS,
> lag would never be noticable.
I think that is called a "circuit".
sPj
I had the same exact problem with VoIP, except I also didn't like the fact that 911 calls didn't go to the 911 center. However, I've figured out how to get around these problems:
So yeah, that should cover it. If you want more info, chech the Asterisk-Users list under the topic "Vonage, PSTN, 911, and hardware question". I'm planning building a system with this setup later this year.
I have Packet8 VOIP at home, and I love it. I have a 6 down/768k up Speakeasy connection and I've had no problems.. no outages, great call quality (Linksys WRT54GS running Sveasoft firmware), and I can take the box with me when I travel... VOIP is great, as far as I'm concerned, landline-quality phone (or better) for $20/month...
Michael R. Rudel
Owner, http://www.obhost.net
We're replacing our knackered commander system (15 years old) with a bunch of VOIP phones (Snom 190). Also we're splitting our shop into two premises; using a WiFi link (with WEP/MAC filtering/IPSec/L2LTP etc for security).
Using VOIP on our local LAN/WAN, we can share the same PSTN line pool (about 20 lines total) between both shops. If someone dials one shop but wants to speak to someone in the other, we can transfer that call. Very useful, not to mention the other possibilities with Asterisk (caller ID, call logging, stats, voicemail, extensions, music on hold, etc).
As for actually using a VOIP carrier for outgoing call... no, not yet.
We're setting up with Asterisk and Digium TDM400 cards with FXO modules.
Standard x86 servers, Linux, Asterisk, Digium and Snom phones add up to a LOT less than the integrated turnkey solution we were looking to get from Siemens.
Supporting (generally) the parent post, Vonage is pretty good. I've been using them for my main work line for about 2 months now. Quality of service is excellent and the voice sounds quite good (think high quality cell phone) most of the time. You get a ton of great features for not too much cash. I love getting my voice mail as an .WAV file in an email, and it is really easy to foward calls wherever you need them.
The only time I have a problem with a connection is if I'm downloading, or worse uploading (dsl) something big at the same time which is entirely expected. (only so much bandwidth after all) My only recurring problem is that the Motorola unit they gave me tends to drop my PPPoE connection about once a day. Not quite sure why and there aren't a lot of settings to tinker with. I don't have that problem very often with my Linksys WRT54G and I'm pretty sure it's not the DSL provider (SBC in this case) causing the problem.
Anyway if you are thinking of Vonage I can readily recommend them if you can tolerate the occasional (and easily fixed) downtime. If phone availability is mission critical to you or you aren't especially technologically inclined, you might look for a more traditional alternative. But overall it's a great service, especially for home or home office use.
- People to be polite, and not mislabel traffic for their own advantage. What happens when some bit-torrent users figure out how to double their download speeds by setting the QoS bits on their traffic.
- People to agree on priorities... if there is a late breaking virus, maybe it is more important to download the patch than for fifteen teenagers to share a rave in quadrophonic sound.
- People to be reasonable... I dont care if you do drive a mercedes 500, all your traffic is NOT high priority. (that is, can people buy QoS? If you have QoS then the whole billing question becomes very interesting, and the price of the data will shoot back up to voice network levels, because every intervening hop will, quite reasonably, want their cut.
QoS is a DOA technology on the Internet. The technology makes a lot of sense on corporate networks, where there is somebody in charge, but in the wide world, it just is fundamentally not going to happen because the interested parties have no incentive to make it work.IP telephony will happen because the bandwidth will rise to the point that voice traffic becomes noise to everyone but the last mile. The last mile will have to take care of their own problems (perhaps using a cheapo version of QoS, such as preferring packets on a certain port, but it will not require any action of the network.)
oh... folks were complaining about acronyms, so.. DOA -- Dead On Arrival, the status of unfortunate patients on reception in the Emergency ward of a hospital. Also applies to technologies, ie. MiniDisc, MemoryStick, (oh.. stop picking on Sony...) DAT, Video Disk, (technologies that arrived and died without garnering much market share.)
SIP does not always work well through NAT, even though there are some implementations that are NAT friendly. Also, some ISP's that offer their own VOIP service will block your access to competitors. ATTBI did it to me, I was even on the phone with the tech when he found the access list in a router that was blocking my access to Vonage.
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I can readily recommend [Vonage] if you can tolerate the occasional (and easily fixed) downtime.
. . . Wow. As if the tolerance of Windows BSODs wasn't bad enough, now this? Whatever happened to "you pick up the phone and it just works"? In 26 years of using POTS, the only thing I can recall even approaching an outage is very occasional "circuit full" messages on long distance calls on holidays, and I haven't even heard those for over a decade.
If you can deal with not having a functional phone every now and then, then I'm certainly not going to argue with you, but this casual acceptance of "things break" is rather surprising. And somewhat disturbing, as it reduces the incentive to make things work well. I, at least, would vastly prefer a pencil and paper that "just work" to an electronic notepad that did OCR and networking but a habit of conking out at the most inopportune times; I've got enough stress to deal with as it is.
Worse: your spouse/beloved answers your phone and hears a sexy voice saying "Hi, I saw you at the party..."... or "Brandy and I had a great time last night, we'd like to see more of you...".
How much is that PBX in the window? ok, so Id like an SS-7 switching network, and I aint a phone company, oh? cant have one? have to run my own wires? hmm...
Separating control from data only makes sense if the network is smart. Smart networks only make sense if the manager of the network is your friend. Usually, that is not the case for anyone except the phone company. The whole point of IP is to make the intermediate network a non-issue. make it stupid so that there isnt any value there, and it can be replaced by any number of technologies or providers. That is always going to be cheaper for end users, but not the phone company.
backgrounders:
Tm
/obvious
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