Powervoip sip settings sip.powervoip.com

You can use the powervoip with your existing sip device

General configuration
SIP port : 5060
Registrar : sip.powervoip.com
Proxy server : sip.powervoip.com
Outbound proxy server : leave empty
Account name : your PowerVoip username
Password : your PowerVoip password
Display name/number : your PowerVoip username or voipnumber
Stunserver (option) : stun.powervoip.com

Below are some examples of the software configuration of various popular SIP devices. Please also consult the manual that came with your SIP device
Codecs
G.711 (64 kbps)
G.726 (32 kbps)
G.729 (8 kbps)
G.723 (5.3 & 6.3 kbps)
GSMFR (13.2 kbps)

If you have audio problems:
Use a STUN server (e.g. stun.powervoip.com) with port 3478 (if supported by your device)
Use the G.711 codec

for more visit
https://www.powervoip.com/en/sipp.html