HandyTone 502 (HT-502) from Grandstream is an analog 2xFXS, 2xETH VoIP Gateway (SIP ATA adapter) with the integrated router.
APT Telecom Services Limited
APT Group mainly provides high quality services in satellite transponders, satellite communication and satellite TV broadcasting to the broadcasting and telecommunication sectors in Asia, Europe and the United States, and achieves remarkable results.
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