Error 423 "Interval Too Brief" on iOS

Question

When attempting to register SIP account I am getting the error "Interval Too Brief(423)"

The same setup works on an android device, but on those there is an option to increase "Registration expiry time".

Is anyone aware of an option to change the Registration expiry time in the iOS version of Zoiper? 

Answer 1

Hello,

Zoiper for iOS uses the default expiration times for the respective transport types, which are:

- UDP: 60s;
- TCP/TLS: 600s.

The reason for that is the nature of the iOS system, where if you do too many request for certain amount of time the operating system will kill the application. On the other hand, if the requests are too rare, the opearting system will suspend the application in background causing it to not receive any calls.