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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How do i run asterisk behind an VPN?

I am new to asterisk, so basically i know nothing about IP PBX. I need to start the a VPN server with behind it asterisk and my clients should be able to connect with softphone with build-in VPN ...
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1answer
33 views

How to make international phone calls from my computer' through my SIP server?

I'm currently working for a scientific company, and I'm the only programmer here, and the company wants me to use one of their servers to setup a SIP server, and somehow be able to make calls to ...
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18 views

Is it possible to get a the real number from a caller despite the inbound caller ID being spoof'd? [closed]

I remember years ago someone telling me that if you used Google Voice and someone called using the *CODE to hide their number, that if you recorded the call you could retreive the real caller number. ...
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18 views

Recovering Google Hangouts call history

When a user changes their Google account password, they are automatically logged out of Google Hangouts on any and all Android devices. This has the unexpected consequence of deleting all their call ...
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1answer
12k views

“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: ...
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50 views

Linksys SPA3102: receive PSTN calls on sipphone, route outgoing calls to voip provider

I'm having problems to configure my Linksys SPA3102 according to my needs. I have a sipdiscount.com account, a PSTN line, a SPA3102 router (just bought it) and a sip phone. Until now I used my sip ...
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3answers
583 views

What is the difference between VOIP and Internet Telephony?

These terms are often used interchangeably. Is there any difference the two terms, or is one of the terms subset of another?
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3answers
5k views

How to connect a remote IP Phone to our VOIP Network?

We have an IP phone system in our office, and about 8 VoIP phones running on the system. We have a remote worker, who is literally states away. We'd like to connect his phone to our VoIP network, so ...
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1answer
43 views

New modem/router doesn't allow VoIP going through

Before I bought my new Netgear D7800, I had a Fritzbox 7490 provided by my swiss ISP Sunrise (see image case A). It does all tasks : modem, router, connects landline phone to be used as IP phone. ...
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1answer
60 views

No fax detected with HP MFP

I'm trying to set up a HP LaserJet MFP (multifunction fax printer) M476dw as a fax machine. It's connected to a Linksys PAP2T analogue telephone adapter (ATA) with VoipVoip as service provider with a ...
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1answer
25 views

VoIP adapter for doorbell [closed]

At Network Engineering I was told that my question was off-topic there, but that I could ask it here, so here it goes... I hope that it is on-topic. Current situation At home I have a Siemens TFE/V ...
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1answer
16 views

SIP forwarding via DNS. Possible?

Let's say I have an address sip:john.doe@example.com that I would like to use for Internet calls, but my SIP provider is Callcentric and I need to route such calls to sip:17775551234@callcentric.com. ...
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1answer
52 views

Cannot see VOIP calls in Wireshark 2.0.0

I received a pcap dump from a site, running Cisco JTAPI, who's VOIP traffic I need to analyse. I use Wireshark's VOIP calls analyser via the menu: The conversations display fine in Wireshark ...
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5answers
165 views

ISP blocking VoIP - Morocco

Moroccan ISP's have blocked VOIP services since yesterday.. and we are looking for a way to counter it, even if we have to use a paid service. We'd like to get around this block - Could I use a paid ...
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5answers
43k views

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.) ...
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1answer
34 views

Home structured cabling - which cables?

I've recently purchased a 25U rack with some networking for my home. I'm about to order some Cat6, but I wanted to ask a few questions: I noticed that some people have video cabling in their homes. ...
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14 views

AT&T DSL causing static on VOIP line

We recently changed from Comcast internet to AT&T DSL. Since then we're having static on our phone line, which is a Vonage VOIP line. I'm assuming I need a filter, but I'm not sure where to put it ...
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2answers
1k views

Sipura / Linksys / Cisco SPA3102 problems with analogue phone

I have bought 2 of these SPA3102 - One direct from china(verified original) and one from Ebuyer UK but it is called SPA3102 -UK I find this guide and followed it I am only going to talk about the ...
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1answer
38 views

Does Ventrilo encrypt the VoIP stream, session, and/or communications?

If you're not familiar, Ventrilo is a voice chatroom used for gaming. Here's the wiki for Ventrilo and similar software Mumble and TeamSpeak to give you an idea of what the software is about. I ...
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1answer
57 views

Home network - do I need QoS?

I'm planning to install a home network with the following hardware: Netgear UTM50-100 ProSecure Netgear ProSafe JGS524PE (24 Port switch, 12 Port PoE) ESXi Server w/ 2 VM's (AWS Storage Gateway ...
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0answers
44 views

linphone: remove/hide “default identity”

Linphone automatically generates a computer-local SIP identity called "Default Identity". "Real" SIP accounts you have at a VoIP provider need to be created as "Proxy accounts": The main window ...
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3answers
409 views

Jitsi and Telekom Germany - outgoing calls “Call failed - Not Acceptable”

I am trying to configure Jitsi to operate as a softphone for my Telekom Germany VoIP-connection. So, I went to the website of Telekom Germany, which provides the following details for connecting: ...
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1answer
110 views

How to receive incoming calls on landline and mobile phone at the same time [closed]

Current situation a fixed landline for phone just one number: 123-456789 handled by one DECT base station with three phones one mobile (Windows) smartphone with its own mobile number, having wifi, ...
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27 views

Small business VoIP and wireless router [closed]

We recently changed our phone system to Ooma (http://www.ooma.com) but kept our current Internet provider, Time Warner. We have one router in the office and a booster plugged into the hallway wall ...
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1answer
184 views

No audio after SIP reinvite

I am trying to get a Gigaset C470 IP to work on my Internet connection. I have figured out the correct configuration for the device and my router (a pfSense sitting between the DSL modem and the LAN) ...
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3k 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 ...
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22 views

Is it possible to avoid long distance charges with an IP-based phone?

Is it possible to avoid long distance charges with an IP-based phone? I am not talking about client-based VOIP services here (like Skype), I am talking about a REAL IP phone using Asterisk or some ...
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1answer
61 views

ISP blocking 5060

Here is a problem. I move my RasPBX Server (Asterisk for Raspberry Pi) to new apartment and ONLY one ISP in building which is blocking 5060 After few days fighting with Asterisk, I discovered that ...
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1answer
26 views

What is: Keep port forwarding of the Internet router enabled for telephony

When using a fritzbox with attached phones in bridge mode behind another router, manufacturer avm suggests to enable the option Keep port forwarding of the Internet router enabled for telephony, ...
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1answer
17 views

3cx or other IP PBX - can this be done without a paid incoming/outgoing number

I am looking to setup 3cx for family use with a couple android devices. Do I need to buy a SIP trunk if I just want to connect the ony 4 devices to each other? If i do get a line, can I only have 1 ...
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0answers
59 views

How to call other phone in the same house and network

I have an analog phone (Panasonic KX-TS505MX) and it is connected to my modem router (ZTE F660) via POTS. My router modem have 2 POTS slot, my question is if I buy another phone, is it possible to ...
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2answers
33 views

Increasing network range for new VOIP users

Our office using 192.168.1.0 /24 for DHCP 120 users and reserved 20 IP for servers and 10 IP for network printers. Now management decided to upgrade to VOIP phones for all users so I need to make ...
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21 views

Belkin Router OpenWRT Custom iiNet Model

I am trying to install OpenWRT or DD-WRT on an old belkin ADSL/VoIP router/modem. But, because it is a custom model made for iiNet the model number isn't listed anywhere. I have opened up the case ...
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2answers
153 views

Gateway iP address after increasing network to /22

I am using /24 network now but i need to increase to /22 (255.255.252.0) in order to get more space for upcoming VOIP users and mobile users. But all of our servers are configured from 192.168.1.1 to ...
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34 views

Why is my sip software calling 105

I have a very bad sip provider "vbuzzer" but there prices are cheap ,they don't have an app for android (there is one in the store but i am pretty sure it is not official ,and a scam) and their ...
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1answer
17 views

POE phone: ethernet passthrough: is it transparent? [closed]

I have a small sub-net in my office on a Netgear router. We're getting POE phones. If I plug the POE phone into the wall jack for its power and signal, will the phone pass the ethernet data signal ...
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0answers
35 views

Routing VoIP traffic across VPN?

Context (the Why): I have an RV (recreational vehicle) that I travel around in, connecting to various campground wifi APs (and sometimes my own Verizon Mifi hotspot). I have a VoIP phone I use for ...
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1k views

Android SIP / VoIP with doorbell: View video before answering

I am currently using the 2N Helios IP Vario doorbell device. It can be used via SIP protocol, but can also communicate with the 2N Android app directly, without an additional server, which I would ...
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1answer
18 views

When in voice call and mic is active my headset has severely reduced quality

I have a steel series Siberia headset and the sound quality is great when I'm not in any sort of VOIP call. Once my mic is active though, even when the option to listen to the mic when I speak, the ...
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2answers
251 views

mp4 video for asterisk with ulaw as audio and h263 for video

Scenario: I want to play a video file on asterisk. my softphone only support ulaw/h263 for audio and video respectively. So I am allowing both formats in sip.conf file and expecting it to run. ...
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2answers
221 views

How do I setup my voip phone to use VPN server?

I've installed Bria 4 on Windows 7 pc. I've got a 15MbPS broadband connection. The Bria on my PC fail to register with this network. However if I connect to VPN server(hide.me), with the broadband ...
3
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2answers
280 views

Which one is more secure and efficient for VoIP: PPTP, L2TP, or TLS?

We are going to have some kind of secure VoIP implementation. We have come into make decision between VPN-based methods like PPTP or L2TP/IPsec and TLS-based methods. The question is which one is ...
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2answers
2k views

Failed to authenticate SIP peer

I am trying to connect an SIP peer using Zoiper to my asterisk server. The peer is a soft-phone on my server. I have the following config for the peer: [201] disallow=all allow=alaw ...
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0answers
22 views

SPA504 SPA525 2nd Line Ringing when using first Line

Been fighting my provider for 8 months on this. Have SPA504 and SPA525 Phones. When on a call on line 1, when a 2nd call comes in, instead of ringing line 2, line 1 rings again. It flashes indicating ...
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1answer
19 views

Proxy voip server to use ISP's VOIP service outside

I figured out how to get my ISP's voip credentials from my router. I used them on an iPhone voip app and it works but if I am not using isp's network it doesn't work. So I am trying to run a proxy ...
2
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1answer
1k views

Is it possible to use firefox hello in debian iceweasel?

Now that I have Iceweasel version 38.2.1 installed in Debian Jessie (stable), this discussion says it should be possible to use the internet phone within Iceweasel. But I can't see "Hello" in the ...
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2answers
47 views

Asterisk and x100p - Error: wcfxo: Out of space to write register 05 with 0a

I am running a IP PBX system with trixbox, what i'm trying to do is connect PSTN lines with IAX2 using X100P analogue card. The problem is i cannot call any outgoing routes. (already tried ...
0
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1answer
93 views

Asus NT-R56U wiress router and VoIP device

The problems are I cannot log onto my wireless router When both are connected, it doesn't work. When only one of VoIP and router are connected, it works beautifully The configuration looks like ...
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12 views

Analog Centrex to Digital Centrex

Is there a way by which we can convert analog centrex to digital centrex? I have analog centrex at office and we want to convert it to digital so want receive and call using PC. Is there a way we can ...
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0answers
30 views

Cisco IP Phone drops call when using group pickup

I have a cisco ip phone that is part of a group. When a call comes through, one phone rings for 3 rings and then rings the group (I believe this might be called a "Hunt Group"). If I group pickup ...