Rtx 8430 ip dect handsetthe rtx 8430 ip is an entry level dect handset for use with the 8630 ip base featuring with a high quality 14quot tft display and graphical user interface this handset affords users optimal flexibility and call qualityexcellent soundthe rtx 8430 supports the g722 codec for hd wideband audio as well as the g726 codec for standard audio the handset further benefits from an in built hd speakerphone and a 35mm headset socket for conversations in excellent clarity ha