Grandstream GXW4104 4-Port FXO Analog VoIP Gateway.
4 ports, 2 10/100 Mbps network ports, Comprehensive codec support, caller ID, flexible dial plans and security protection, Advanced security protection with SRTP, Designed and tested for full interoperability with leading IP-PBXs, soft-switches and SIPbased environments, PSTN Failover on power failure.
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