Grandstream GHP621 IP Phone - Corded - Corded/Cordless - Wi-Fi - Desktop, Wall Mountable - Black - 2 x Total Line - VoIP - IEEE 802.11a/b/g/n/ac - 1 x Network (RJ-45) - PoE Ports

Look very carefully before you buy. The "Grandstream hotel phone" series seem to be somewhat stripped down in capabilities compared to the same manufacturer's "small and medium business" phones. There's no call display. There are supposedly SIP registrations for two lines, but only one of these can place outbound calls. And then this gem from the documentation: Due to the environment in which these are intended to be installed, no means is provided to reject calls. There are multiple models in this series. Unless there's a 'W' in the model number, the station has no wi-fi. The GHP621 is *not* interchangeable with the GHP621W, and any descriptions claiming otherwise are wrong. The product looked interesting because of its low price and small desktop footprint, compared to the mainstream Grandstream office telephone lineup - but removing key features like multiple lines and caller ID is a step too far. I don't answer calls from people I can't identify at home, why should I do so in my travels?