The Vega 50 6x4 enables enterprises and service providers to connect sites with a legacy of mixed analog and digital applications to the IP network via a single, cost effective and manageable The Vega 50 6x4 connects a range of legacy telephony equipment, including PBX's, ISDN telephones, ISDN, analog phones and the PSTN to IP networks. With 4 port FXS, FXO and BRI modules available, the 6x4 can be configured to address any non-PRI ISDN environment.