sip system failure in mainland china

Hello, describe please what is the problem. Is it blocked by carrier? be free to ask me any question. bye, Pavel.

I have 7 years of experience in voip. and can resolve your sip voip issue. I am available to start right now.

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I have been working with VoIP for 15 years and have decent experience in resolving various problems in call routing (SIP, H.323), voice fading, loss of RTP, RTCP packets: problems on gateways in PSTN and much more

I am working as network consultant in one of the most reputed company Dimension Data(NTT). I have more than 8 years of experience. Please find below my core Competencies • Design & Deployment of Cisco Collaboration Suite • Installation, Upgradation and Configuration of UC Applications (CUCM, CUC, UCCX, IM&P, CER, Expressway etc) • Prepare HLD, LLD • Voice signaling protocols (SIP, MGCP, H.323, SCCP) • Depth troubleshooting knowledge of UC Applications and voice protocols. • VMWare vSphere and ESXi • Basic knowledge of Routing & Switching • Basic knowledge of Wireless

Hello. I am voice network enginner and I am expert at VoIP. I have been working with VoIP for 7 years. Also I use many exchange , SBC and VoIP gateway. I can help you for VoIP problems whenever you want and whatever. Thank you

HI, My name is Azeem, I have profound experience in Voip setup and also work experience in different Voip companies and have good knowledge in SIP and H323 protocols of VOIP. Please let us know some details about your problem to analyse and proceed further.

Hi, I am a VOIP expert having more than 14 years of experience in this field have worked on products like Asterisk,Cisco, Avaya and Protocols like SIP, H.323 and Megaco,could help you to resolve the SIP issue asap.