NETGEAR (www.netgear.com) VEVG3700 gateway. Depending on how the service provider orders it, the device can incorporate at CAT-iq gateway. Support for HD voice, regardless of CAT-iq, is included via G.722.
Moving through the food chain, the DHH1000 Digital Hub.
Close-up of the VDB1000 handset/base, supporting G.722, DECT and CAT-iq.
The DHH1000 can support up to four (4) DECT handsets, so you’d get the DHH1000 as a base, and then add on VDB1000/VDH1000 handsets.