The E-TDMA-based GMH2000 fixed radio system developed by Hughes Network Systems (HNS) provides an effective local radio loop solution for the public telephone service.

休斯网络系统公司(HNS)的GMH2000固定无线系统是一个基于E - TDMA的系统，它为公用电话业务提供了最有效的无线本地环路的解决方案。

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So far, facsimile is mostly carried on PSTN (Public Switched Telephone Network), which brings numerous expenses together with the service.

目前传真业务主要在公共电话网上承载，这种传真业务的使用给企业带来了巨额的支出。

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