This uses the 2G GSM Wireless Frequency.
VS-GWM400G module allows OpenVox wireless VS-GW1200/1600/2100 series gateways to support GSM connection to the VoIP devices. Each module offers four GSM channels. This is the V1 Old Model Module and works with the new GW1202V2, GW1600V2, GW2120V2 Chassis as well as the V1 Old Models.
This module is NOT compatible with the SWG2008 Series of Gateways.
Software & Platform:
Warranty: One Year Limited Manufacturer Warranty
Other Model Code: VS-GGU-E2M0400