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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SIP ALG detector

I am trying to create a detector for SIP ALG. I really just need to know what the BEST method of testing this is so I can write a program to test whether SIP ALG is enabled or disabled. Thanks
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23 views

How to properly setup a VoIP client with VPN?

We want to use Zoiper VoIP client with TotalVPN but seems like they are not playing nice together. Zoiper accounts are going off the moment we turn on TotalVPN. Any suggestions?
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14 views

Billing for inbound calls using A2billing and Asterisk

I have installed A2billing and integrated it with Asterisk, Is there a way to test A2billing for inbound calls ( I mean asterisk to asterisk or local users)? I just want to add define rates for ...
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1answer
52 views

Does Skype use only Ipv4 or also IPv6?

A simple question. Does Skype use IP version 6? If yes, how can i set it to use this type of addresses? Are there other VOIP application using IP version 6 (like VIBER or Whatsapp)? Thanks
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34 views

Block Whatsapp Voice Calling

We are using Whatsapp (Android) to communicate with our customers and would like to block only the Voice Calling (VOIP) feature on the app since we route all voice calls through our PBX. I do not ...
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23 views

SIP with Huawei LTE cube E5180

I have recently obtained a Huawei LTE cube E5180 for connecting my home WLAN to the Internet. As a newby to SIP I have also noticed that the LTE cube comes with some SIP support. It allows the ...
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23 views

How do I troubleshoot a Cisco IP phone with no sound? [closed]

In provisioning the Linksys branded Cisco IP phone described below I think there's an error with regards to the dialplan in the hard phone, or perhaps ports, preventing sound. Admittedly, I have no ...
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25 views

How is a SIP invite sent?

The telnyx Data API tab describes a SIP request: Requires IP Authentication to be setup through the portal and associated with LRN under Telephone Data Tab Send a SIP Invite to lrnlookup....
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13 views

WatchGuard SNMP Traffic Accounting vs ISP Accounting

Our Setup I currently have a WatchGuard XTM 2 Series running as our firewall. There are two Internet connection lines: one EFM line for data traffic and a high-speed ADSL line for VoIP traffic. The ...
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3answers
58 views

how do I provision a hard phone for getonsip?

In provisioning a Cisco SPA 942 hardphone, branded Linksys, how do I finish the setup for getonsip (or onsip)? SIP Address: foo@getonsip.com Username: foo Domain: getonsip.com SIP Password: ...
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18 views

SIP server name Defaults to $VERSION for Cisco SPA 942 hard phone

In reading the fine manual for a Cisco SPA 942 IP phone, branded as Linksys: what is, in particular, meant by: SIP Server Name Server header used in responses to inbound responses. Defaults to $...
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1answer
49 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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32 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
40 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
61 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
21 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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5answers
180 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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15 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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1answer
35 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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1answer
52 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
63 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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59 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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1answer
75 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
222 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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26 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
72 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
18 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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1answer
35 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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95 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
35 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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23 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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35 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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1answer
64 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 v1.10....
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47 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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58 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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1answer
23 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
348 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
251 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 ...
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2answers
321 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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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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2answers
193 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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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 ...
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2answers
52 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 ...
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1answer
115 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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33 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 ...
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137 views

Can I use a Vonage ATA as a Google Voice device?

I have a never-used Linksys WRT54GP2 Wireless Router with Vonage enabled phone ports. Recently, I heard from a friend about his successful use of Google Voice with an Obi100 device, replacing his ...
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1answer
120 views

How to create account balance for each users in asterisk freePBX system? [closed]

I have an asterisk server up and running. Users connect via extensions(IAX2). How do i create balance account for these users? any help would be appreciated.