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TA Series FXS VoIP Gateway Cutting-edge products that connect legacy telephones, fax machines and PBX systems with IP telephony networks and IP-based PBX systems. TA Series FXO VoIP Gateway Connects analog telephone lines or PABX extension interface to VoIP networks. A cost-effective and reliable solution for office-to-office voice connectivity. FXO VoIP Gateway TG Series VoIP GSM Gateway Connect GSM/3G/4G network to VoIP network directly and support two-way communication: GSM/3G/4G to VoIP and VoIP to GSM/3G/4G. VoIP GSM Gateway Analog Telephone Adapter Provide 1 or 2 analog interfaces for residential users and small business to convert existing analog equipment to IP-based networks cost effectively. Analog Telephone Adapter TE Series E1/T1/PRI VoIP Gateway Bridge the gap between ISDN telephony connections such as common RJ-48c / T1 interfaces to provide dial tone to most VoIP PBX phone systems. E1/T1/PRI VoIP Gateway TB Series VoIP BRI Gateway Offer 2 or 4 BRI ports to integrate ISDN BRI line into any VoIP system or enable any IP PBX to be connected to the ISDN network.