Zoiper gives the following messages: “registration failed Certificate validation Failure 503"

0 votes


Would you so kind to help me with my problem:

I have Zoiper(3.8) and Iphone 5s(v 9.3.3)

Create a new Zoipher account :

Account name: AC_NAME

Domain: xx.xxx.xxx.xxx

User name: 1000

Password: *******

Additional settings / Network settings 

Transport: TLS

Additional settings / Encription settings 

Enable ZRTP - NO Enable

SDES negotiation - Enable


 The connect It's ok - enable WiFi , down 3G.

I have  enable net 3G and WiFi.

If WiFi down , 3G enable( switching between wifi networks and 3g ):

Zoiper gives the following messages: “registration failed  Certificate validation Failure 503"


asked Jul 28, 2016 in iOS by qemu-glusterfs (120 points)  

1 Answer

0 votes

This error is shown in case either the certificate is not verified, or it is a self signed one and needs to be manually accepted via the popup.

answered Aug 25, 2016 by Ivan (18,410 points)  
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