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About product and suppliers:
        Alibaba.com offers 366 vad sip products. About 100% of these are voip products. 

A wide variety of vad sip options are available to you, such as voip phone, voip gateway, and video phone. 

There are 366 vad sip suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of vad sip respectively. 

Vad sip products are most popular in Southeast Asia, South America, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 366 with ISO9001 certification.