URL which triggered the bugreport is: /gateways/2
GS5 buildname: 1402200642 (5.2-beta3)
Sipgate st quite picky regarding SIP headers. Assuming your SIP is 123456 and your Sipgate phone number is +496128123456 following headers needs to be set in gateway config:
invite clir=false From "123456" <sip:123456@sipgate.de>
invite clir=false P-Asserted-Identity "+496128123456" <sip:+496128123456@sipgate.de>
If Sipgate sends a 407 to your call request, this notice may help.
This needs to be documented.