Freeswitch Sofia Module and DNS NAT Expert required

I am an IT engineer with 7 years of experience. I am also a VoIP specialist who master core modules server: Asterisk and client:Pjsip based I think, I can help you.

Dear sir. I have over 5 years' extensive core service development experience with FreeSwitch core. I have many experience with some software like your project. I'm really confident about your project, and very eager t 기타

Hello, I have gone through your requirement and found that your requirement is best matching my skills. I have experience in the VOIP related development (especially FreeSWITCH) for more than 2 years. I have worked wi 기타

i have experience on FreeSwitch since 10 years. Do you want to add extra sip header ? i can do this things if i can debug sip log and know more your requirements.