The Vega 400 digital gateway connects digital telephony equipment to IP networks. All Vega 400 gateways have four E1/T1 interfaces and can be purchased with various VoIP capacities up to 120 VoIP channels. The Vega 400 has been designed with future expansion in mind and consists of :
> Base Vega 400 unit with expansion slots
> Field-installable expansion modules to provide additional VoIP channel capacity.
A Vega 400 unit can therefore be installed with one VoIP channel capacity and then later additional capacity can be provisioned as and when it is needed.