Yealink T30POne line, PoE, modern firmware, $69.

Why the T30P is on the catalog.

The T30P is the version of the T30 that pulls its power from the ethernet cable. Same chassis, same screen, same firmware, plus the PoE PSE chip. For $10 more than the T30, you skip the wall wart and the outlet hunt at every desk. For any modern office, this is the obvious pick over the non-P variant.

Where it fits in the catalog: it is the cheapest current single-line Yealink with PoE — the right purchase for a warehouse pickup window, a back-of-house phone, a kiosk that needs to ring a clerk, anywhere the phone just rings and the user picks it up. Single line is the right answer when there is literally only one number that ever calls this desk.

What to upgrade to instead: if there is any chance someone might want to put a second line on this desk later — a personal extension, an after-hours line, a hunt-group overflow — jump straight to the T31P at $10 more. Adding a SIP account later means buying a new phone; future-proofing now costs almost nothing.