Poly Plantronics EncorePro 310 Mono Call Center Headset

Every call center has the moment where an agent talks for ten seconds before realizing mute never came off, and the customer on the other end heard exactly none of it. The Poly EncorePro 310 is built to catch that before it costs the call — Poly markets its Dynamic Mute Alert as the only verbal mute alert in this class of headset, speaking up the instant you start talking while muted, so the agent knows in real time instead of finding out from an annoyed customer.

It's the mono model in Poly's EncorePro 300 series, the newer entry-tier line built for high-volume contact centers — priced below the established EncorePro 500 series without dropping the things that actually affect a shift: a noise-canceling boom mic, acoustic protection against sudden loud bursts on the line, and soft, replaceable foam cushions. The EncorePro 310 comes three ways — a Quick Disconnect version for desk phones, and USB-A or USB-C versions for softphones — and the connection you pick changes more than just the cable.

Build the exact EncorePro 310 you need

Three connection types, one for desk phones and two for computers — pick based on what your team is actually plugging into.

• Quick Disconnect (QD) — 77T43AA. For desk phones with a bottom cord or amplifier. The QD connector itself is tested to over 30,000 disconnect cycles, but the cord or amplifier that connects it to your phone is sold separately — confirm what your desk phone needs before ordering.
• USB-A — 767G1AA. Plugs straight into a computer for softphone use. Includes inline controls for answer/end, volume, and mute, plus the verbal Dynamic Mute Alert. The pick for most standard desktops and older laptops.
• USB-C — 760Q8AA. Same inline controls and Dynamic Mute Alert as the USB-A version, built for newer laptops and USB-C ports. Identical audio and features — the connector is the only difference.

Does the EncorePro 310 tell you when you're muted?

On the USB versions, yes — the Poly EncorePro 310 includes a Dynamic Mute Alert that verbally tells you you're muted the moment you start talking, a feature Poly positions as unique among headsets in this price tier. It's a small thing that solves a real, recurring problem: an agent talking into dead air for a full sentence before checking the mute light.

The QD version needs a cord you'll buy separately

Unlike some Poly Quick Disconnect bundles that ship with the phone cable included, the EncorePro 310 QD does not — you'll need to add a bottom cord or amplifier that matches your specific desk phone. It's an easy thing to miss if you've bought bundled QD headsets before and expect the cable to just be in the box.

Is the EncorePro 310 built to last in a call center?

Poly rates the EncorePro 310's Quick Disconnect connector for more than 30,000 disconnect cycles, which is the number that actually matters in a high-turnover contact center where headsets get unplugged and replugged dozens of times a shift.

Beyond the connector, acoustic protection (SoundGuard, with SoundGuard Digital G616 on the USB models) limits sudden spikes above 118 dBA coming through the line, and wideband audio up to 6,800 Hz keeps voices sounding natural rather than compressed. The ear cushions are foam and replaceable, which matters for the total cost of running dozens of these through a shared fleet — you're not replacing the whole headset when a cushion wears out.

Mono, so one ear stays open

The EncorePro 310 is monaural — one ear covered, the other open — which keeps an agent aware of a supervisor or a colleague nearby, at the tradeoff of blocking less room noise than a stereo headset would. If both ears covered fits your floor better, Poly's EncorePro 300 series also includes a stereo sibling, the EncorePro 320, built on the same platform.

Manage a fleet without walking the floor

The EncorePro 310 is the headset for a contact center watching both the budget and the return rate — a durable QD connector rated for real daily use, acoustic protection that keeps a long shift from wearing on an agent's ears, and on the USB versions, a mute alert that quietly prevents one of the most common, most embarrassing call center mistakes. Pick the connection that matches your phones or your computers, and it's ready to deploy across the floor, backed by HeadsetPlus's lifetime support.