Zoiper - Request Timeout error (code 408)¶
This error means that the phone did not receive a reply from the server (or there is no connectivity with it) and is common with new installations or when changing the network connectivity, i.e. being it 3G / 4G or WiFi network.
Check the routing device/ firewall settings.
Common reasons include:¶
Open Zoiper -> Go to Settings -> Accounts -> (your account)
Double check that the setting for "Domain" is correct and does not contain any spaces.
Please open your browser and check if you can visit a random website. If not, you have to fix your internet connectivity issue(s) first. If you are not able to do so yourself, we would suggest contacting your ITSP (internet service provider)
- contact your internet provider and ask if they allow VoIP calls on their network;
- use TLS encryption for the SIP signalling, especially when combined with a server running SIP on port 443.(this requires server side support for TLS);
- use RTP encryption for media;
- use a third party VPN service;
Be sure to Disable SIP ALG on the router. A list with problematic routers and solutions can be found here http://www.voip-info.org/wiki/view/Routers+SIP+ALG
A list with common firewalls and how to disable them can be found here: https://help.backblaze.com/hc/en-us/articles/217664708-How-do-I-disable-my-firewall-
Zoiper has a few settings to trick the server into sending the packets to a different IP address or port.
Please try different settings combinations of STUN (enabled or disabled) or rport for signalling (enabled or disabled).
STUN ON - Rport OFF
STUN ON - Rport ON
STUN OFF - Rport OFF
STUN OFF - Rport ON
Please note that:
A combination that works on one WiFi access point or 3G/4G network might not work on another.
A combination that works one WiFi or cellular network for a specific VoIP server might not work for another one.
If the above fails, please contact your provider or PBX administrator might be able to tweak a server side setting to make things work.
Please contact your provider for further assistance;
Please make sure Zoiper and the PBX are on the same network or setup a VPN between the device running Zoiper and your PBX. Please consult with your system administrator for additional help.
Check also if the needed ports by Zoiper are not blocked in your firewall/ routing device.The default ports used by Zoiper are:
SIP port is random above 32000
IAX port is 4569 UDP
RTP port is 8000 and above UDP
Default STUN values:
Server hostname /IP: stun.zoiper.com
Port: 3478 UDP/TCP
Refresh period: 30
Available in other languages: RO
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