[OpenSIPS-Users] Help with Push Notifications

[Liviu Chircu]

Hi Andrew,

Indeed, the expected result is Flags: 4 here.  Your Contact looks OK at 
a first glance.

Especially since you're on a test lab and generating RFC 8599 compliant 
traffic using hand-made sipp scenarios, please put OpenSIPS in debug 
mode (4), do a "grep -C5 mid_registrar" on the entire logs generated 
during the REGISTER and post the results here (or mail me privately is 
privacy is a concern).  The DEBUG logs should give us strong clues on 
what PN detection steps your OpenSIPS takes before giving up on that RFC 
8599 Contact.

Best regards,

Liviu Chircu
www.opensips-solutions.com | www.siphub.com

On 27/01/2026 17:35, Andrew wrote:
> As we can see Flags: 0 but should be 4.
> mid_registrar_lookup returns 1 (should be 2).
> OpenSIPS doesn't generate E_UL_CONTACT_REFRESH event.
> Is there anything wrong with the REGISTER request?