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About product and suppliers:
        Alibaba.com offers 603 telephone main board products. About 6% of these are other pcb & pcba, 1% are power distribution equipment, and 1% are advertising boards. 

A wide variety of telephone main board options are available to you, such as free samples, paid samples. 

There are 523 telephone main board suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Ukraine, and Taiwan, which supply 98%, 1%, and 1% of telephone main board respectively. 

Telephone main board products are most popular in North America, Southeast Asia, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 132 with ISO9001, 53 with Other, and 11 with FSC certification.