Voice Over Internet Protocol is a name of a family of technologies that allows transmission of voice over an established network connection. What is usually discussed, though, is Internet Telephony - bidirectional voice (and lately video) transmission over public networks.

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Receive and route phone calls through computer

I volunteered to work for a political campaign. We want to make a unified number (with multiple lines) to put as contact us number. We want it to work like customer support numbers, you call a fixed ...
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Google Voice to be used as a regular phone line

is there a way to use Google Voice on regular phone? perhaps with an additional SIP device? or something? I heard I could do it through Gizmo5, but they have limit of 3 minutes now which is stupid and ...
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microsoft lync linux client [closed]

we are currently evaluating Microsoft Lync server (previously Microsoft Office Communications Server). It talks sip over TLS (TCP 5061) with SIMPLEmessaging, what linux client would you suggest to ...
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3answers
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What is the best way to import and/or sync Gmail-Google contacts with Skype contacts?

What is the best way to import and/or sync Gmail-Google contacts with Skype contacts? Is this even possible?
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3answers
674 views

Are there any free applications for audio chatting via Google accounts in Ubuntu?

Are there any free applications for audio chat for Google accounts in ubuntu ?
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4answers
2k views

best open source software for voice chat in linux [closed]

I recently started working on a project with a remote developer and we want to be able to talk verry easy over VOIP. We are both on ubuntu and have tried using skype, but it gets all kinds of weird ...
5
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2answers
835 views

Secure PC-to-PC voice call without going through a server [closed]

I want to voice-chat to a friend over the Internet. (Video would be a nice bonus.) I want the conversation to be private and I do not trust Skype, Google, etc., so I want it encrypted end-to-end. ...
5
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3answers
3k views

Replacing my home phone with a VOIP solution?

I'm considering replacing my expensive home phone line with a VOIP option, but want to make sure I'm prepared for what to expect. I have a high-speed internet connection, and a (nearly) always-on ...
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5answers
862 views

Do VoIP packets travel through the internet link in LAN calls?

or do they leave the LAN if they don't really need to? If both parties in a call are in the same LAN, does the SIP/Skype call voice packets travel in and out through the internet? If so, how do I to ...
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3answers
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Recommended client to handle more than one SIP account?

I currently have two SIP accounts, so Counterpath's XLite won't do, as it only handles one. They have a commercial version (Bria, eyeBeam : Not sure of the difference). Before I buy either Bria or ...
4
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2answers
2k views

How to make calls from a remote computer through my land-line phone?

I have a great land-line phone plan; I barely use all of the minutes. Is possible to add a modem/server system so that I can make calls through this line via the internet when I am away? What kind ...
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5answers
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Linux Skype issue. How to work with Pulseaudio in Ubuntu Karmic and/or Hardy?

I'm trying to use Skype with Ubuntu Karmic and I just don't understand how to configure Pulseaudio properly. The previous version of Skype allowed me to talk through and hear the voice on my USB ...
4
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2answers
228 views

Are there any free voice changing programs for Windows?

I would like to be able to change my voice in real-time while using any chatting software. This would include Skype and any IP-phone software. I found Clownfish for Skype, but was looking for ...
3
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4answers
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How does SIP work and what is its use in VOIP?

How does SIP work and what is its use in VOIP? Do I have to have it or can I use a direct plug-in to the computer to use VOIP?
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2answers
2k views

SIP client to open a web page with caller ID

Does anyone know of a SIP client that can open a web page to a configurable URL when someone calls? We have a web-based database, and I'd like to search by phone number whenever we get an incoming ...
3
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2answers
1k views

One way broadcast of SIP call using Wowza

I have a POTS conference call taking place and I want to live stream the audio over the internet using Wowza. My plan is to dial into the conference call essentially bridging the audio onto the Wowza ...
3
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1answer
639 views

Can you run DSL and T1 through a single switch for two different purposes?

I'm not quite sure this works, but my co-worker says it will. Details first: We have a small office of less than 10 PCs, and we use VOIP for our business phone line. All PCs require internet access. ...
3
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2answers
443 views

Is there an adapter to use a regular phone with Skype or Google Voice?

Is there an adapter to use a regular phone with Skype or Google Voice? I found this Dlink adapter but it is discontinued, any idea why? Will it still work in Canada and in the US? Any suggestions for ...
3
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1answer
851 views

Per-contact notifications in Skype

Is there any way to get Skype to show tray notifications only for specific contacts or groups of contacts, rather than for everyone or no one? There's a shareware Skype Extra called Contact Alarm ...
3
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2answers
467 views

Is there actually a way to make video calls through XMPP/Jingle WITHOUT Google Talk?

Good day people, I'm writing because I've spent the whole day trying to make video calls through XMPP but I haven't really found out if it's actually possible. There are many clients which ...
3
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1answer
326 views

Skype dial out shortcut

I've created shortcut on desktop which looks like this "C:\Program Files\Skype\Phone\Skype.exe" "/callto:echo123" However, whenever I run the shortcut I have firefox open with Launch Application ...
3
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1answer
516 views

A good softphone for OS X

I'm sorting out a VOIP setup for the office that I work in (there's about 50 people, mostly macs), and I'm looking for a good SIP softphone that would work with an Asterisk based PBX, and I figured ...
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getting pbxes, sip2sip, ipkall all working

I was able to make a call from my landline to my ipkall number and have it ring on my android device running sipdroid. Just once. Since then, when I call my ipkall number, I get "The person at ...
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4answers
4k views

Open source chat protocol that handles voice & video?

I'm looking for a chat protocol which: Has easy to use clients which will run on both Windows and Linux. Has a server which I can run myself on Linux (preferably easy to set up). Supports duplexed ...
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3answers
3k views

How to associate a softphone with a phone url

I'm trying to get click to call to work using Qutecom for a softphone and a Greesemonkey script to turn phone numbers into clickable urls. Whenever I click on the phone number link I get an error ...
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3answers
703 views

Will VPN will slow down VOIP traffic?

If I have a Linux setup with VPN in Paris and a Linux setup with VPN in London, both with high-speed internet, will packet-switching be slower for VOIP than if I didn't use VPN? A few people have ...
2
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3answers
679 views

Skype shows I'm online when I don't have any Skype instance running

Recently Skype shows me as online to my contacts even when I do not have any instance of Skype running on my desktop I signed out of Skype on my mobile Apparently, this is a feature not a bug. ...
2
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1answer
729 views

Does mobile phones use TCP/IP? [closed]

Does mobile phones (any kind of mobile phone?) use TCP/IP over radio signals for internet? I would also like to know if they use VoIP for telephony? Please tell me what they use, I'm confused.
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2answers
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What is the difference between a VoIP phone and a SIP phone? [closed]

I was under the impression that SIP is a protocol for the initiation of communication between applications, and that the protocol VoIP is for the transmission over an established pair of IP addresses ...
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4answers
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How can I use a fax machine over WiFi?

I have a fax machine in a location that is accessible only through nearby WiFi. I'm in an unusual situation where it must be an ancient fax machine and not a nifty eFax solution (much to my chagrin.) ...
2
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1answer
348 views

What other ports should I block to maximize server security? PS using IPTABLES

I have blocked ports 80, 9001, 9080. What other ports should be blocked to maximize security? PS: It is a asterisk server / PBX Sorry: New Systems Admin here :) Thanks!
2
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1answer
468 views

What are the internal workings of Google Voice?

I am new to Google Voice and am interested in how it works internally so I have few doubts about it. Is the Google Voice number itself a SIP number? How does Google Voice receive calls from any PSTN ...
2
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1answer
216 views

Which Messenger service allows you to make voice calls with the least amount of bandwidth?

I'll be going to a country side for a few days and the speeds there are pathetic! Which voice messenger uses the least amount of bandwidth in order to make voice calls to other pc's. Speeds are a ...
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2answers
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Is there a way to Call with skype in my LAN without internet connection?

Is there a way to Call with skype in my LAN without internet connection ? If yes, tell me how please ;)
2
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2answers
622 views

Realms in Asterisk

How can a system (Asterisk) accept realms? I mean, for example we have two SIP accounts: exampleuser@test.com and exampleuser@anothertest.com. For Asterisk by default, these two accounts are the same ...
2
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1answer
172 views

Which codec should I choose to work with in a VoIP project? [closed]

I would like to work with a codec in a project for the university. I'm interested in the VoIP telephone service. The idea is to implement the codec in a DSP and then characterize it. My question is ...
2
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4answers
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What does a device with 4 FXS mean?

If an analog telephone adapter is advertised as having 4 FXS ports, what does that mean to me? Can I connect 4 different phones to it? If it doesn't have an FXO port, can I connect it to the public ...
2
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3answers
718 views

I want to connect to my router through wifi and use its pstn phone line

Can anyone refer me where to look I want when I am not at home to connect to my router and use it to call through my phone line (so when I am out of the country I will pay local price to place calls ...
2
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1answer
1k views

program to dial land phone, enter password and record?

is there a program for Windows (or linux command line) platform that would do below from a command line? call a land phone number (using my SIP account) enter password record the call finishes after ...
2
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2answers
557 views

What N+ modem routers with VOIP exist?

i'm looking to purchase an N+ wireless router with built in voip capabilities. why n+, because i have some bad interference with my crappy (old) 802.11b Netgear Wtg624 router + nb1300 modem (yes, ...
2
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2answers
161 views

How can I get a shortcut to “Phone Dialer” in XP Pro

I have found the installed phone dialer in Windows XP Pro. But the only way I have found to access it is through the Run Command. How can I assign a shortcut to this program?
2
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5answers
2k views

Do I have to have a special router or modem to enable VOIP?

Do I have to have a special router or modem to enable VOIP?
2
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1answer
3k views

How do I setup a Polycom phone over internet connection sharing?

What are the Internet Connection Sharing settings that I need so that I can have my Polycom phone utilize my wireless connection? The physical configuration is as follows: Computer accesses the ...
2
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2answers
2k views

SIP providers with local number portability?

Anyone know of a good voip provider that will allow me to port my existing phone number to their service and be cheap? I'm looking to spend no more than $15 a month; am I in dreamland? Also, I've ...
2
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1answer
113 views

Why my outgoing VoIP calls are sometimes that bad?

I have a Cisco SPA122 ATA Router in Bridge mode where I connect my analog phone. Turns out that usually on incoming calls, I don't have any issues: connection goes smoothly, the caller hears me ...
2
votes
1answer
160 views

How to I setup a VoIP Server (not connected to telephony)

What I need is a VoIP server that allows people use their data bundle to make calls within an app (mobile/PC), but not necessarily app to phone but App to App. That means, both users have the app ...
2
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2answers
246 views

Call someone on the same network using VOIP calls

Is there a VOIP software where I can call a friend on the same local network? I should be able to add friends via their local IP addresses and provided they have the same software installed, be able ...
2
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2answers
75 views

Hardware and Service for Voip

What king of hardware/service do I need to create a voip system in my LAN ( only PC-to-PC call and without internet connection !! ) ? 1) Internet Connection 2) Voip phones ... . Help me to compile ...
2
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1answer
2k views

Caller ID not working

I have an ASUS AX-112W Voip box behind a router, connected to a regular phone. After hours fighting with the router and the voip box, I finally found a configuration where everything works almost ...
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1answer
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“Caller rejected because extension not found” in asterisk

I'm an asterisk newbie and I've just installed it on my ubuntu 12.04 server with sudo apt-get install asterisk. I'm following the tutorial for asterisk from here: ...