Extension immediately goes unavailable?

Anyone any ideas why this happens on local extension Fanvil x3sp on freepbx
Other zoiper extension defined the same works without any issues

What am I missing??? SMH

Thanks in advance

11346 [2024-04-21 20:46:11] VERBOSE[18162] res_pjsip_registrar.c: Added contact ‘sip:[email protected]:5126’ to AOR ‘1111’ with expiration of 3600 seconds
11347 [2024-04-21 20:46:14] VERBOSE[4720] res_pjsip/pjsip_options.c: Contact 1111/sip:[email protected]:5126 is now Unreachable. RTT: 0.000 msec

Line 2 which is defined the same on another voip service works fine and I can dial out on both lines

For extension 1111, try setting Qualify Frequency to 0 and Max Contacts to 4.