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About product and suppliers:
        Alibaba.com offers 2,997 sip door phone products. About 46% of these are video door phone, 16% are voip products, and 1% are locks. 

A wide variety of sip door phone options are available to you, such as voip phone, video phone, and voip gateway. You can also choose from free samples, paid samples. 

There are 3,050 sip door phone suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Philippines, which supply 97%, 1%, and 1% of sip door phone respectively. 

Sip door phone products are most popular in Eastern Europe, Southeast Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 1,139 with ISO9001, 46 with Other, and 18 with ISO14001 certification.