No: Sky are not a 'VOIP provider'. They are increasingly provisioning Sky Talk (bundled with Sky Broadband) using VOIP in preparation for PSTN switch-off, but that's different (and the subscriber end is physically integrated into the Sky Broadband Hub and not available otherwise).
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Sky Glass 55" (on ethernet) & two Stream Pucks (one ethernet / one WiFi) BT Halo 3+ Ultrafast FTTP (500Mbs), BT Smart Hub 2
If you thinks about it, there's no such thing as a 'voip landline': VOIP is shorthand for a set of protocols, and doesn't care what the data bearer is.
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Sky Glass 55" (on ethernet) & two Stream Pucks (one ethernet / one WiFi) BT Halo 3+ Ultrafast FTTP (500Mbs), BT Smart Hub 2
