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Grandstream HT881 is an analog-to-IP gateway with eight FXO ports, plus one FXS port and two Fast Ethernet ports. As an analog FXO gateway, HT881 allows you to use analog phone lines with a VOIP phone system. In other words, using HT881 lets you integrate VOIP devices with your existing traditional telephony devices and infrastructure. Use the eight FXO ports for connecting to a PSTN line from a PBX or PSTN Central Office. Use the FXS port for connecting an analog phone or fax machine to HT881 using a standard telephone cable. The gateway is also a NAT router, protecting the edge.
HT881 improves collaboration in the office by supporting 3-way local audio conferencing per port. It also supports the T.38 Fax Over IP protocol. It's even a practical solution for emergency communications by enabling lifeline support in case of power outage: place PSTN calls in the event of disruption to internet service.
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