Android Question How to use sip between two device?

[bjfhs]

I know the device's IP,and I don't want use sip server ,and only want to call between the two device,what can I do?Thanks.

 

[DonManfred]

hat can I do?

I don´t think this is possible as there is no server component for SIP. As far as i know of.

 

[bjfhs]

I don´t think this is possible as there is no server component for SIP. As far as i know of.

Thank You very much. I need call from PC to andriod,,I know the IP, can you give a advice?

 

[DonManfred]

How should i can give any advice? There is NO SERVER SIP Component in Android/B4A

 

[Erel]

Half duplex communication: https://www.b4x.com/android/forum/threads/30648/#content

 

[bjfhs]

Half duplex communication: https://www.b4x.com/android/forum/threads/30648/#content

Thank Erel,But I need full duplex.
If need a sip server,how can i build a sip server?

 

[Erel]

You need to learn the SIP protocol. I guess that it will be quite complicate to build a SIP server.

 

[bjfhs]

You need to learn the SIP protocol. I guess that it will be quite complicate to build a SIP server.

Thank you.SIP or Webrtc, I don't know which is the better one?Perhaps I need to learn it.

 

[tigrot]

Install an Asterisk Box and the VOIP PABX is done! This allows any time of comunications between smartphone everywhere or hire a shared pabx from a provider.

 

[bjfhs]

Sip.Initialize2("SIP", "sip:[email protected]", "XXXXX")
Sip.Register

I get error Registration failed.

 

[bjfhs]

Today ,I try to build a sip server with yate.I can find it online on another PC ,but when I use Sip.Register,Registration failed.
You can find yat2:http://docs.yate.ro/wiki/Download#Windows

Sip.Initialize2("SIP", "sip:[email protected]:5060", "123")
when I set port 5060,it work.

 

[bjfhs]

Now I can hear from device A to device B , BUt can't here device B to device A,Why?
The two device work in the same local network.

 

[tigrot]

Check firewall, the issue is normally in some port closed, on your network

 

[tigrot]

If the device is not reinvited the channel goes from device to server and back to the called device.

 

[bjfhs]

Check firewall, the issue is normally in some port closed, on your network

Thank you .I have closed the firewall,But it still can't hear form device B to device A.

 

[tigrot]

Try with a commercial phone(there are free or or free to test), so you can check configuration of SIP server, on both smartphones. Sometimes it's harder to configure a server instead of a client!

 

[bjfhs]

Try with a commercial phone(there are free or or free to test), so you can check configuration of SIP server, on both smartphones. Sometimes it's harder to configure a server instead of a client!

Thank you for your kindly,I'll try for it and tell you result.

 

[bjfhs]

Half duplex communication: https://www.b4x.com/android/forum/threads/30648/#content

How can I change it to full duplex?

 

[tigrot]

Don't even try to change full duplex, it's likely to fail with echoes and horrible quality. That is is why it's half...

 

[tigrot]

Larsen effect as well