Questions tagged [telephony]

Telephony is the term for voice communication over distances.

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How does G729 Codec compress down to 8kbps?

As per https://en.wikipedia.org/wiki/G.729: It has a sample frequency of 8kHz, so every second it takes 8000 Samples: Sampling frequency 8 kHz/16-bit (80 samples for 10 ms frames) It has a fixed ...
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Firefox fails to find telephone number in table displayed by FritzBox, but Microsoft Edge does

When I display the table of completed phone calls in FritzOS 07.28 on my 7490 via (German) "Telefonie->Eigene Rufnummern->Sprachübertragung", there are many phone numbers. However when ...
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If a Bluetooth device "features" Bluetooth 5, will it still pair & work with devices that only support an earlier version of Bluetooth?

If a set of earphones / headphones "features" Bluetooth 5, will they still pair and work with devices that only support an earlier version of Bluetooth? If an example product is helpful to ...
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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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How to setup Outlook to use connected phone to call contacts?

I have my smartphone and and Windows 10 PC connected to the same Microsoft account. My Smartphone does show up as a connected device on the PC. I can easily initiate phone calls with the phone from ...
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How does telephone infrastructure change with multiple phones [closed]

I am imagining the typical POTS configuration where one telephone set is connected to modem, which is connected to a phone jack inside a two-story building. The wires from the phone jack are somehow ...
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How to place and receive phone calls on Debian?

I have a 4G modem with a valid SIM card on a Debian PC. The WWAN card is a Fibocom L850GL provided by Lenovo on a new X1C7. I have modem-manager-gui and I can send and receive SMS with it. How can ...
4 votes
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How to use a Windows 10 computer to make and receive POTS/PSTN phone calls in 2019?

I would like to connect a PSTN/POTS, RJ11 (or RJ12) cable to a device and connect that device to a Windows 10 USB receptacle. I would like to be able to make and receive phone calls using the default ...
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Is there a way I can switch on my computer or NAS with a phone call?

I would like to know if there is a way to switch on a computer or a NAS using a phone call received through a RJ11. I was thinking of sending the number followed by a password e.g. mytelnumber#...
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IP intercom across two networks

I need my 2N IP intercom to ring phones across two different networks. NetworkA is 10.1.10.x and has a switch NetworkB is 17.148.17.x and has a switch Someone said I should buy a router to ...
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Can Hardwired Telephone Lines be used to Extend a DSL Connection?

My current configuration has what appears to be an RJ11 connection going from the wall jack directly to my DSL modem. Here is a picture of the faceplate; the blue jack is the phone line and the green ...
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ROUTERS and SIP TELEPHONE

I have just installed a new router with enhanced firewall and wireless capabilities. The new router does not have a DECT port, the unit from my ISP does, so I'm looking to interconnect the two to ...
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Initiating a DTLS connection

I am running a Janus WebRTC gateway on a Windows 10 Professional computer. Using this gateway I am calling a soft phone (Xlite) in our LAN from a Firefox browser (on Microsoft Azure virtual machine). ...
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Use a raspberry pi as a POTS phone?

I would like to use a computer as a handset POTS telephone. Why? - I want to use a raspberry pi on the telephone port of an Analog Telephone Adapter (ATA) just to see if I can use it to automate ...
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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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How significant is PSTN (POTS?) today? [closed]

This question comes from a guy (from Europe) which really needs some insight here, as this topic was really confusing for me (everybody explained it differently, this was wrong, this was right, then ...
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how to integrate mobile call to a chatbot using asterisk

I am developing a voice based chatbot which can call a person and have the conversation. Currently, the chatbot uses my pc mic and speaker for input and output audio. I am trying to integrate this ...
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Converting a P.O.T.S line to VoIP and simultaneously ringing a extension over VPN

Anyone with knowledge please help. I have analog phone service + internet at SITE 1. I only have internet service at SITE 2. When the phone rings at SITE 1 I would like the PC or an attached phone ...
2 votes
1 answer
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Internal calls issues asterisk vicidial

I have just installed new Vicidial v7.0.3 on an i7 12 GB Ram pc I have completed all steps in the installation including OS-install, network configuration, Firewall set to internal on one of the ...
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BitTorrent interference with a landline telephone

There are still certain spots in Lancaster County, PA farmland where DSL internet is the only thing available through a wire (there's satellite, but that is a different matter). Now, DSL and a ...
3 votes
1 answer
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tel: tag in chrome (mac os x) opens facetime, but in gmail it opens hangouts, how to make it open hangouts everywhere?

There is a discussion about the handler of the tel tag here: https://productforums.google.com/forum/#!topic/hangouts/ItliGvezjdM However, no solution was proposed to make hangouts handle all such ...
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Make a phone number ring for some time using a 56KB modem

we have an old modem model US Robotics Sportster Flash and we'd need to use it to open a door in our organization, by making a phone call to an internal number (say, 101). We are running on an Ubuntu ...
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VOIP virtual numbers

I recently purchased a virtual number which is similiar to local landline number provided by my local provider. how voip provider can provide virtual numbers over VOIP? Do they have contract with ...
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Cant connect to the router/Connection refused

I found today my older router "FritzBox" (Fon Wlan 7390). I searched the web for some things i could do with my router, then I found that I can use it with my new newer "Fritzbox" and use the old as ...
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Internet vs. telephone cable. How can I tell them apart? Which of them is this one? [closed]

I have found a cable in a wall. I think that it is a telephone cable (the building is quite old). Is there a way to specify by the colors and wire count, what cable it is? I'm very sorry for my ...
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Do I really have a telephone-only cord connected to my RJ-45 jack?

I recently purchased an end table that comes two electrical outlets and an RJ-45 jack. The RJ-45 jack came wired with a cable I am having trouble identifying. The markings say E170689 AWM STYLE ...
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VPN connection problems regarding plex media server and voice over IP

I have a home server - running Debian Jessie and plex media server. My router (fritzbox) allows all smartphones in my LAN to receive incoming landline calls (due to a certain app). This part works ...
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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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1 answer
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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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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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Communicating programatically over a telecommunicating alarm

I own a Yale EasyFit alarm system which allows me to control it over a kludgy telephone interface (doc here) Here's an excerpt of how it works: Remote Access The control unit allows you to control ...
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1 vote
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General mask for a telephone number?

I'm making a web form and wanted to have a general template for a phone number. In my experience every phone number might be represented in 13-digits format: xxx-xxx-xxx-xxxx. For example the country ...
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4 votes
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Should fax machines use a DSL filter?

I have heard DSL prevents some items that use phone lines from functioning properly, such as home alarms. First of all, is it possible to use a fax machine on the same line as a DSL modem and ...
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47 votes
1 answer
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Possible to use Bluetooth headset in Stereo mode with Mic?

Okay, so I have this bluetooth headset (it's a Skullcandy Hesh 2 Wireless). I want to use it with my PC which is running Windows 8.1. I can pair it just fine. After pairing it adds three devices under ...
33 votes
4 answers
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How to use a Linux system as a land phone

I have a land line connection. I would like to receive and make calls using my computer. It is a basic land line connection which also provides broadband internet. I am not asking about VoIP. I ...
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Asterisk / Digium card / FreePBX : how to define on which inbound port I want to connect the telephony line on my 4-ports telephony card?

I am a newbie with Asterisk. I have a 4-ports Digium telephony card. I connected my analogic telephony line to one of these 4 ports. I have set up an IVR thanks to the FreePBX interface. I have set ...
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Direct network between computers over phone line

I have two computers with modems, that are far from each other (different locations), and do not have internet acsess. I have hyperterminal, and so how would I connect the 2 machines together (with ...
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Routing calls to a mobile phone with a Mi-Fi?

I am traveling to the U.S. soon & I am planning to buy a Mi-Fi and a prepaid SIM with a voice and data plan being included. So, besides using the Mi-Fi as wireless data access point to which ...
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Outlook asks me to enter area code when editing telephone numbers in contacts

I’m keeping my Hotmail contacts synchronised with my phone. However if i try to edit the phone number in Outlook 2007 on my PC, i get the following dialog box: Sorry for Polish language, this ...
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how to record normal/PSTN calls using asterisk

i want to recording incoming calls and outgoing calls using asterisk. when i make a call from my mobile phone with a custom dialer. my calls will not be a voice calls i.e. Voice over ip , that will be ...
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How to use Asterisk build a telephony system with one land line and two cell phone numbers? [closed]

I think I am on the same boat like many others: My family has a land line from my local telephony company and we have two cell phones (lines) as well. We live in a two-story home. I am considering ...
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Difference between VOIP and IP Telephony

I am studying CCNA, and in the curriculum I found something like following... ↓↓↓ VoIP When introducing VoIP to a network that uses traditional telephones, it is important to remember that ...
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Can I set up a PBX server to make calling features that otherwise I need to pay? [closed]

I have a traditional home phone line from my local telephone company. I subscribe to a few calling features, such as call display, call waiting, visual call waiting, voice mall, etc. Call features are ...
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How can I get the phone number from a computer modem?

On Windows 7 x64, Device Manager detect my modem as HDAUDIO Soft Data Fax Modem with SmartCP, I would like to know if I can connect the landline to my modem port, and when there is a call, grab the ...
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Asterisk replacement for multi-line/multi-phone/all ring Nortel system?

I'm trying to replace an aging Nortel phone system with an Asterisk based system. The existing system work something like this: Phone 1- -Line 1 Phone 2-- --Line 2 Phone 3-...
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Can Windows XP Mode access the telephone port on a computer? [closed]

I would like to use my Windows 7 PC as a telephone. I know of an undocumented feature called Phone Dialer (C:\Windows\System32\dialer.exe), but the interface of it is quite minimalistic and does not ...
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2 votes
1 answer
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Unable to dial 0800 numbers since Skype prepends country code

I've being trying to use Skype (version 6.9.0.106) to make a Brazilian tollfree call but it is unable to complete since Skype prepends Brazilian country code to the dialed number. I'm dialing 0800 ...
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Do i need connect router to master socket?

I have multiple telephone sockets in my house. When I connected router to master socket, everything is ok, but when I connected it to any other socket my internet is around 2.5 times slower. Is it ...
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Can you have Fax and ADSL on one line?

I have one phone line, with an ADSL connection on there. If I plug a fax machine into the filter, will it kick me off the Internet when a fax is sent or received?
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Fax and Analogue phone on a single phone number [closed]

How does this work? If I have a single phone line, say 0207223333 and on the line I have a BT splitter with an analogue phone and a fax connected. If I was then to dial that number, how would it ...
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