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The Grandstream GXW4104 analog FXO gateway allows small businesses and remote locations to seamlessly connect up to 4 PSTN lines to an existing IP PBX System or analog phone system. The GXW4104 features 4 FXO ports allowing up to 4 lines to connect to the PSTN and 2 switched 10/100 Ethernet ports that can be routed to connect to the network.
The Grandstream GXW4104 is an advanced low-to-mid-density analog gateways with dual 10M/100M network ports, integrated router, rich telephony features, comprehensive voice codec and fax support, flexible dial plan, and strong security protection that can be used for IP enabling traditional analog PBX or key systems, inter-branch-office voice/data communications, and as PSTN trunk gateways for software based IP PBX systems.
It is T.38 Fax compliant and features G.168 echo cancellation support. The GXW4104 Analog Gateway also includes a video surveillance port so you can incorporate Grandstream IP surveillance cameras into your network
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I paired this up with a VM asterisk ( running in esxi ) + Polycom 331. Works flawlessly. One word of advice; I ended up setting DTFM to inband instead of RFC2833. Anything out of band was flaky or inconsistent.
The Grandstream GXW4104 is a very good solution for small offices and analog access systems. Very recommended product.
This product fulfills the requirements of most our costumers needs. Mainly the price and the functionality.
Poor support and functionality
We could not get any support in configuration and the unit failed out of the box. The vendor refused to issue an RMA