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About product and suppliers:
        Alibaba.com offers 485 wan phone system products. About 3% of these are pbx, 1% are corded telephones. 

A wide variety of wan phone system options are available to you, such as paid samples. 

There are 398 wan phone system suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 99%, 1%, and 1% of wan phone system respectively. 

Wan phone system products are most popular in North America, Eastern Europe, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 29 with ISO9001, 18 with ISO14001, and 7 with BRC certification.