FAXBACK AudioCodesMediant1000B Media Gateway (M1KB-D6)Mediant1000VoIP Gateway, 2 E1/T1 with Fallback SIPPackage-IncludesMediant1000B chassis, one Active/Standby pair of GE interfaces, including one module with 4 spans E1/T1 and 60 VoIP channels for PSTN