Softphone app not registering to freepbx inside local network

[david55]

https://wiki.freepbx.org/display/FPG/Advanced+Settings

https://wiki.freepbx.org/display/FPG/Extensions+Module+-+SIP+Extension#ExtensionsModule-SIPExtension-RingTime.1

Limit Ring time for outbound call

I want to limit the Ring time for Outbound call. Can anybody help me how can i do this

However, I believe the default is 30. 20 sounds more like a network limit.