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Question of the Day: What's the most interesting small town you've visited in South Africa?
Voip without Internet
- Thread starter CarmenR
- Start date
Herr der Verboten
Honorary Master
DIY client and server?
gfmalan
Expert Member
Yealink cordless phones can make calls between each other, no SIP server needed. 8 handsets/ deskphones per base station.
You can install Asterisk on a Raspberry PI, or maybe on a virtual machine on any of the computers on the network.
You can install Asterisk on a Raspberry PI, or maybe on a virtual machine on any of the computers on the network.
Distance of devices to the base station?
I did hear about people doing it. Connecting their phones to the same Wi-Fi network, installing the software on their phones and calling / texting each other like that. Don't know how they do it though.
Will look at the raspberry pi option.
I guess one can use walkie talkies. Lol
Not secure communication that.
I did hear about people doing it. Connecting their phones to the same Wi-Fi network, installing the software on their phones and calling / texting each other like that. Don't know how they do it though.
Will look at the raspberry pi option.
I guess one can use walkie talkies. Lol
Not secure communication that.
gfmalan
Expert Member
Difficult to say, depending on walls and steel structures, you do get repeaters.
This is the easiest option, and just work.
Raspberry PI work great, you don’t need extra paid codecs like G729. Download GSWave app on appstore and connect to your Raspberry.
I would download Virtualbox, install PBX in a flash on VM, give VM static IP, and connect softphones (Bria, Zoiper or GSWave) to the VM via wifi, only issue is the app on a phone goes to sleep and then it doesn’t work.
Grandstream makes a wifi cordless VoIP phone.
Cheapest easiet option is the Yealink route.
Hamish McPanji
Honorary Master
Something like this : https://play.google.com/store/apps/details?id=com.slide2talk.android.app
Hamish McPanji
Honorary Master
I'll be honest, never tried it, I just googledThanks. Will read up a bit on their website. The more info i get the better.
Well thanks anyway. Will try it on 2x phones. Connect to the same Wi-Fi network and see. Hopefully it works without Internet.
You might be better off even using 2G for VOIP. See what Mobile network has the best coverage and speed. The G729 codec only uses 8Kbps which is well below even a slowish 2G connection. The latency might be the issue.
quovadis
Honorary Master
Is this possible? Say 5x people connect to the same wireless network, and they want to stay in touch with each other with voip / messaging. I'm thinking rural. No Internet.
With regular sip phones you can configure them to call each other directly as long as they have static IPs. You can run Asterisk for Raspberry Pi as a VOIP PBX too. If you're looking to install a sip client on a phone they generally require push notifications for call notifications which requires internet access.
Hamish McPanji
Honorary Master
H323 endpoints forwarded from each router connected to the wan to the app on the phone.
quovadis
Honorary Master
Mobile apps that monitor signalling destroy battery life which is why most use push notifications which obviously would be a problem with 5 phones on the same wifi network and no internet access? Also, I'm assuming wireless network means wifi so it'd be a flat wlan?
Hamish McPanji
Honorary Master
What's the distance between the places?
Its on a farm. The houses is far away away from each other. I'd say 60meters is the closest and the furthest is 500meters. Currently they using walkie talkies.
Hamish McPanji
Honorary Master
How are you connected to the same WiFi at 500m? Unless your routers are connected to the same WiFi
quovadis
Honorary Master
Why do you need routers to connect to the same WiFi?
Is there out of the box solutions for this ? And just add additional extras ?
I wonder what happened to village telco.
Hamish McPanji
Honorary Master
Outdoor p2mp . There is no other way you will achieve that type of range. Unless you stand on the roof with your device