asterisk users - Sep 2016 - Asterisk 13 + PJSIP softphone issues

Hi,

Do all sip phones supports Asterisk 13 + PJSIP?. I'm having issues of
connecting ekiga softphone  and Snom 710 to Asterisk. zoiper phones works
fine. Asterisk is behind NAT. The phone sends register with expires 0.

Best Regards,
Madushan
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