Questions tagged [voip]

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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VOIP devices unable to register with the providers

My VOIP devices have been unable to register on their networks for at least the last 12 hours. These devices were working fine before. I have tried the Grandstream HT802 with 2 different providers. ...
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ASterisk 18 - Webrtc etxension call has no audio or video after attending call , sip extemsion to another sip works fine

I have setup a asterisk on openwrt. everything works fine except calls between webrtc extension and sip extension. Asterisk version is 18 here is the output of httpstatus http.conf is as follows [...
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Linksys SPA-3102 password reset

I've got a Linksys 3102 voice gateway router from a street market very cheap, but it has admin password. I've tried the combination ***-> 73738# using a phone connected to the FXS port as pointed ...
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How to set up calls from PC to go through my phone

I want to recieve calls on my PC from my phone on my actual SIM number. Something like- Someone calls me on my phone-> My Phone routes the call through Wifi to my PC -> I can talk to the person ...
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Building VoIP Lan to Apartment Lan

I am quite new on network engineering (coming from programming background). Got stuck at this problem. Example 1 I have an ASUS RT-AX86U AX5700 router and the building has a 2N Helios IP Verso ...
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Provisioning Poly VVX250 with Google Voice does nothing

I'm starting a small business and need a phone at the front desk. I purchased a poly VVX250 because, according to Google, it is one of the only phones supported by Google Voice. I'm following the ...
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How to setup Cisco 7945 with two lines from different Asterisk servers?

I have a phone line with 192.168.3.10 Asterisk IP Server, and another phone line with 192.168.3.11 Asterisk IP Server. Now I want to setup 900 from the first server and 500 from the second server on ...
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Killer RJ45 cable for Polycom SoundStation 2?

I was working from a conference room, and because the Wifi was dropping, I ended up unplugging a Polycom SoundStation 2 and connected the RJ45 terminated cable into my laptop. I thought that at best ...
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Asterisk issue with IVR and '1' extension number

I have FreePBX 15 installation. I have successfully added multiple extensions. Numbers include some three digit numbers and '1' extension which is a normal ip-phone like others with exactly the same ...
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Understand the possible security measures of incoming RTP audio for VOIP

I have a comprehension question when it comes to the audio transmission part of VOIP. Bob wants to call Alice, who is an external party and not part of his PBX. His softphone forwards the SIP INVITE ...
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SIP over VPN doesn't work properly in certain network

As a test setup I have an Asterisk PBX server that two SIP clients can access via an OpenVPN connection. Both devices use OpenVPN Connect and get assigned an address from the pool 10.61.1.0/24. The ...
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Can't change the linphone sip port on Linux

I'm trying to do change the sip-port of my linphone configuration on the Linux AppImage. I tried to change it in the Linphone settings and in the account configuration. Linphone Settings Sip Account ...
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Incoming audio, but not video, cuts out during calls (Teams and Zoom)

On a fairly regular basis, when in video calls with either Teams or Zoom, I'll experience about 5-10 seconds where: I receive no incoming audio at all I receive incoming video during this period Most ...
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Why Linphone try to resolve the login realm?

I'm trying to use linphone for our PBX but we run in a issue. I use Desktop 4.2.5 - Qt5.14.2 Core 4.4.19 on Windows 10 and the config use a Domain to register and a realm for Login mech. But the ...
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Using NMAP to enumerate VoIP devices on network

Love me some Nmap, but struggling to find a solution to this issue: So your on a network, and want to know what VoIP devices ,specifically SIP, are on the same network, can just use Nmap to scan port ...
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Asterisk: how to get current sip.conf settings?

I'm not sure if sip general parameter (such as rtptimeout) is set. There is no mention of it in /etc/asterisk/sip.conf. But may be it is set somewhere else (in include files, for example). How do I ...
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Asterisk: how to end frozen calls

Sometimes my voip provider shuts down service without ending calls which are in progress (these calls are incoming to my server and they are coming to queue). So calls are never gracefully finished, I ...
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Strange SIP register with false SIP Invite recall

I have here a smartphone app (DIVUS VIDEOPHONE app for iOS version 4.2.16) which makes a SIP REGISTER on an AVM Fritz!Box 7490 and then later should get a SIP INVITE. I just do not know... Does the ...
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is it possible to capture per application sound streams and then use these as recording devices?

i was just wondering if there exists an application nowadays that can capture an applications output (not system wide audio) and then assign it to a "virtual" recording device which i would ...
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Does talking consistently without pauses contribute to jitter in VoIP? Can end-user behaviour mitigate low bandwidth?

I have developed a hunch while using Skype/Zoom/Hangouts etc that, when bandwidth is constrained, talking for long periods without pausing can cause the audio to be garbled at the other end. To be ...
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VoIP and computer on separate VLANs through one cable

In my network I have VoIP (VLAN-ID 30) phones and desktop (VLAN-ID 20) computers on separate VLANs. I would like to run a single cable to my desk from the switch that first connects to my VoIP phone, ...
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How to restrict SIP traffic with tp-link TL-R600VPN router

I need to restrict incoming SIP/VoIP traffic from outside my network to a specific domain. I have a cloud SIP/VoIP system with 2 phones and I'm being inundated with fake/ghost calls (dead air when ...
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VoIP adapter unable to receive calls

I have my landline phone connected to a VoIP adapter, which works perfectly fine when I am making calls but doesn't work when I am receiving calls. The phone will ring like normal, but as soon as I ...
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Adding 7-digit and 10-digit dialing using the Cisco SPA122

I am using the Cisco SPA122 ATA adapter with my home phone. My phone provider (CallCentric) provides instructions on how to setup the adapter, but their instructions only demonstrate 11-digit dialing. ...
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How to use my TP-Link for internet and my ISP's router just for VoIP

I've just upgraded from ADSL to VDSL, at the same ISP, and with that they sent me a new modem/router and they also switched my telephone line from POTS to VoIP. I do not wish to use their modem/router ...
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Connect a music player in SIP voice call

I need to establish a normal Voip conversation between 2 persons and one of them, using a softphone in Windows, insert audio from a music player which can be controlled by the own user. The voip ...
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Why can only one person talk at a time over internet voice chat?

It seems like this is a somewhat localized problem. When using any of a variety of chat applications: whereby, Skype, teamviewer, zoom - it seems as though only one individual can transmit data at a ...
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How to use Jitsi as a softphone SIP client?

Wikipedia lists Jitsi features as including: IPv6 support for SIP and XMPP But where and how are SIP credentials configured? So that I can troubleshoot an Alice and Bob SIP call: sip diagram Above is ...
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Using a dedicated landline for internet? [closed]

as I'm sure many of you already know. Landline connections can be used for internet over DSL and VDSL e.c.t. So I want to know, is it possible to use a dedicated landline connection for internet with ...
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Fritzbox behind a central Fritzbox: How to do internal call of phone on second fritzbox to phone on central fritzbox?

I have a central fritzbox and a second one with an attached phone. The configuration is done as described AVM and works in gerenal. But: How can I do an internal call from that phone to a phone that ...
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Using Zyxel Modem As A Simple Voip ATA Device

I have a Zyxel P-2602HWL modem/router which I want to use as a Voip ATA device only. In other words, I already have a router that I am using and I only want to use the Voip functionality of the Zyxel ...
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Is it possible to make a landline voice call from a mobile connected by wifi to all-in-one box? [closed]

I pay my Internet Service Provider for internet access and landline telephone. He’s provided me with a phone number plus one of those all-in-one connect boxes that contains a modem, a router exposing ...
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are bluetooth headset calls on a 3G Chromebook possible?

Would it be possible to use a bluetooth headset to make a cell-phone call? Or is the 3g capability only for data? I'm inferring this is an OS limitation.
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Failing to initiate a multifuction printer fax connection with VOIP

My wife's computer setup has an old multifunction printer (discontinued Brother MFC-7820N). It includes fax capability, and when we originally bought it, we had an actual telephone landline and the ...
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PC How to record phone call - other side speech is NOT recorded?

On VOIP phone call, using Zoiper software on computer (Windows 10), I am trying to record the entire phone call conversation but the problem is that Audacity, regardless if incoming ( * ) or outgoing (...
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Is there a way to monitor a GrandStream registration status?

I have a provider locked GrandStream device and I had some issues where the device would unregister itself during the night and I would lose my phone line. I cannot afford to not notice when the VoIP ...
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Viking Door Intercom Connecting to ATA-190

I have a analog Viking W-1000 intercom connected to Cisco ATA-190 box, then into Cisco Unify Call Manager. Partition, CSS, etc have been set up, and for testing purpose, when an analog phone is ...
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How does a router know which device handles calls?

How does a home router know which connected device is meant to handle a VOIP call? Is there a specific broadcast that is sent out? My home setup uses an analog telephone adapter (ATA) box in bridge ...
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Add "+" to Cisco SPA122 (latest firmware)

I use Twilio, and I'm required to use the full ISO spec "+" before all phone calls. MY PBX is Asterisk 13.26.0, connected through private network. I have a Cisco SPA122, with the latest firmware. ...
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How to connect a handset to a computer for VoIP [closed]

I'm trying to move away from having physical phones to just using softphones on my desktop computers. I know there are a ton of great headset options, but I don't really want to go that route. I would ...
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Hot to force Asterisk to write date in UTF-8 charset?

CentOS Linux release 7.6.1810 (Core) Kernel: localhost.localdomain 5.0.7-1.el7.elrepo.x86_64 MariaDB: Ver 15.1 Distrib 10.4.4-MariaDB, for Linux (x86_64) using readline 5.1 Asterisk: 16.3.0 built by ...
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Emulate a cell phone on a computer to authenticate a new email account

Background Many of the big email service providers now require a mobile phone number in order to create an account (a land line isn't acceptable). My understanding is that mobile phone access is ...
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No response when access web administration page of wireless router using popular browser, is it a phenomenon of hardware failure?

We have an entry level enterprise wireless router TP-Link TL-WVR1300G (Chinese page) in city B, and we have two physical servers located in city A and city B, and we setup a VoIP (SIP) trunk through ...
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Asterisk sip.conf in MySQL database

I'm able to include a phone inside a database for realtime usage. So, this code (from /etc/asterisk/sip.conf): [phone] type=friend username=phone secret=12345 host=dynamic disallow=all allow=g729 ...
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Periodic Internet Disconnection

Here is my problem: A) Goal Fix periodically disconnecting internet connection. I.e. maintain constant connection to internet (browsing etc.) while wired to router (ethernet). B) Problem I've ...
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Looking for a free VOIP solution using RJ11 PCIe card [closed]

After long hours and several days of diving layers deep through links from google searches, I've decided I just don't understand a lot of what is said about a lot of these "solutions". I don't know ...
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connect to voip gateway and wifi for internet on same windows machine

I have a situation which i will try to explain: i have subscribed for a SIP line. In my country, it is delivered via a MUX device and a cat6 cable. I have connected that to my soft PBX which is ...
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How Does Making a VoIP call through PSTN Work? [closed]

for my college work i was told to draw a diagram showing "information flow" of someone making a VoIP call through PSTN and then explain how it works. After doing research for the last 3h hours stuck ...
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Understanding Yealink VOIP phone configuration

I know how to connect my VOIP phone to asterisk. My asterisk server sometimes goes down so I will like to understand better how can I use a failover server. This guide: http://download.support....
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How do you fix "No Trust List Installed" error on a Cisco 7942G VoIP Phone?

I have a 7942G. I'm trying to connect it to Asterisk. Looking at Settings -> Status -> Status Messages, I see this: Error Updating Locale SEP############.cnf.xml No Trust List Installed I'm only ...
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