Poly EncorePro 320 with a QD connector — a corded headset for contact centres. A stereo configuration with a 30 mm driver and a flexible noise cancelling boom. The Quick Disconnect connector withstands more than 30,000 disconnects.

QD connector, an adapter or cable is required

Stereo, covers both ears

30 mm driver

Weight 105 g

Fold-flat earpieces for quick answering

Two-year manufacturer warranty

Poly EncorePro 300 ordering variants we offer
Order code	Model	Configuration	Connector	Inline controls
77T43AA	310	monaural	QD	no
767G1AA	310	monaural	USB-A	yes
760Q8AA	310	monaural	USB-C	yes
77T26AA	320 (this product)	stereo	QD	no
767G0AA	320	stereo	USB-A	yes
767F9AA	320	stereo	USB-C	yes

Note that a headset with a QD connector cannot be used on its own. QD is a break-away connector that plugs into a USB adapter, a desk phone cable or an amplifier. Without one of those the headset connects to nothing. All six codes in the 300 range are TAA versions.

Key features

Quick Disconnect connector, tested to more than 30,000 disconnects
30 mm driver with a 150 Hz to 6.8 kHz bandwidth tuned for the voice
Flexible 135 mm boom with 290 degrees of rotation and a noise cancelling microphone
Fold-flat earpieces, the headset goes on quickly between calls
Replaceable ear cushions for all-day wearing in shift work
SoundGuard hearing protection, sound limited below 118 dBA
Two-year manufacturer warranty

Description

A headset made for shift work

The EncorePro 300 is the most affordable Poly range for contact centres. It is built around what matters in a call centre: low weight, replaceable ear cushions, a flexible boom and audio tuned for the voice rather than for music. The driver bandwidth is therefore 150 Hz to 6.8 kHz, the band of the human voice. It is not for listening to music, it is for eight hours of calls.

What QD is and why it matters

Quick Disconnect is a break-away connector in the middle of the cable. The agent can disconnect from the workstation and walk away without taking the headset off, then click back in on returning. A headset with QD, however, plugs into nothing by itself. It needs a QD to USB adapter, a QD to desk phone cable, or an amplifier. We offer the DA75, DA85 and DA85-M adapters, the MDA100, MDA105 and MDA524 switches and QD to 3.5 mm or 2.5 mm plug cables. The benefit is that one headset outlives several generations of phones, only the cable changes.

When to take the USB version

If the agent sits at a computer and does not move away from it, it is simpler to order the USB-A or USB-C version. That plugs in directly, needs no adapter and additionally has call control on the cable, which the QD version does not. It also has a wider driver bandwidth, 20 Hz to 10 kHz, so it handles system sounds and alerts as well.

Strengths and limits

Strengths

A QD break-away, the agent leaves the desk without taking the headset off
One headset outlives several generations of phones, only the cable changes
Low weight of 105 g and replaceable ear cushions
Audio tuned for the voice, a flexible noise cancelling boom

Limits and what to tell the customer

Without an adapter or a QD cable the headset is unusable. It must be ordered separately, according to what it plugs into.
The QD version has no call control on the cable. Only the USB-A and USB-C versions have that.
The driver bandwidth is narrow, 150 Hz to 6.8 kHz. That is deliberate, but it is not for music or system sounds.
The box holds only the headset and a guide. No cable, no case, no spare ear cushions.

⚑ atlantis note

The cable always belongs in the quote, or the customer will call

The most common complaint about QD headsets is not a fault but a missing cable. The customer opens the box and has nothing to plug into. So put an adapter or a cable into every quote that carries a QD code. Ask what it plugs into: a computer means the DA75 or DA85, a desk phone means a QD to plug cable chosen by brand, and both at once means an MDA switch.

QD or USB is decided by how much the agent moves

If the agent leaves the desk, walks to the printer or over to colleagues, QD makes sense because they disconnect with one click. If they stay put, USB is cheaper and simpler and additionally has controls on the cable. Ask about this rather than about price, the difference is in operation, not in audio specifications.

Every code in the 300 range is TAA

All six codes we carry are TAA versions, that is compliant with the US Trade Agreements Act. For a Czech customer that is neither an advantage nor a drawback, it simply means no non-TAA version is in our offering. If the customer explicitly requires TAA, the 300 range meets it.

Who it suits

Recommended deployment
Recommended use	a corded headset for contact centres with an emphasis on audio quality and all-day agent comfort, with a flexible boom and fold-flat earpieces
Position in the portfolio	corded contact centre headsets, EncorePro 300 range, the most affordable of the three
How it differs from the 500 and 700	it is more affordable and lighter with a simpler construction and a narrower driver bandwidth; it offers neither a voice tube version nor convertible wearing

Suitable

Contact centres and helpdesks on shift work where headsets are deployed in tens to hundreds of units and agents move away from the desk. Environments that already have QD cables or switches.

Verify

What the headset plugs into, a computer, a desk phone or both, and pick the adapter or cable accordingly. Whether the agent needs controls on the cable, in which case the USB version. Monaural or stereo. Whether the customer already has QD accessories.

Consider another model

EncorePro 500 for a more comfortable build and a voice tube, EncorePro 700 for the top tier, Blackwire 3200 for an ordinary office on USB, Savi 7300 for a wireless contact centre.

The “Verify” and “Consider another model” cards come from the experience of the atlantis team.

What it connects and how

Computer

By a QD to USB adapter

The headset plugs into a DA75 or DA85 adapter, and that into a USB port. The adapter is not in the box and is ordered separately.

DA75

DA85

DA85-M for Teams

Desk phone

By a QD to plug cable

By phone brand, a QD to 3.5 mm or 2.5 mm plug cable, or an amplifier. Ordered separately as well.

we pick it by the phone

Computer and phone

By an MDA switch

The MDA100, MDA105 and MDA524 switches serve both and the agent moves between them with one button.

MDA100

MDA524

Certification for this order code: CE. The USB versions additionally support Windows 11, Windows 10 and macOS, and code 760Q8AA also carries the TCO Certified ecolabel.

Connection and cable

Poly EncorePro 320 with QD connection
Item	Value	Note
Connector	QD, Quick Disconnect	an adapter or cable is required, not in the box
Cable length	762 mm	from the headset to the QD connector, the rest of the run is the cable or adapter
Connector life	over 30,000 disconnects	dozens of disconnects a day are expected
Inline controls	none on this version	only the USB-A and USB-C versions have them

Audio and microphone

Poly EncorePro 320 audio and microphone
Configuration	stereo, model 320, covers both ears
Speaker	30 mm driver, bandwidth 150 Hz to 6.8 kHz, tuned for the voice
Microphone	noise cancelling, bandwidth 35 Hz to 21 kHz
Microphone boom	flexible, length 135 mm, 290 degrees of rotation
Earpieces	fold flat, allowing the headset to go on quickly between calls
Ear cushions	replaceable, soft
Hearing protection	SoundGuard, sound limited below 118 dBA
Weight	105 g
Code version	TAA version
Colour	black

What is in the box

In the box

Headset with a cable terminated in a QD connector
User guide

Not included

A QD to USB adapter or a QD to desk phone cable, without which the headset connects to nothing
Spare ear cushions
Travel case
Poly+ Partner service programme

Order it with the headset

DA85 USB to QD adapter786C7AA

The most common companion to a QD headset at a computer; the Microsoft Teams version is the DA85-M, 786C8AA.

DA75 USB to QD adapter786C6AA

A more affordable adapter for connecting to a computer.

MDA524 QD to USB-A switch8L544AA

For workplaces with a computer and a desk phone at the same time.

3.5 mm plug to QD cable85Q40AA

Three metres, for connecting to a desk phone with a plug socket.

Variants and products in the range

Poly corded contact centre headsets we offer
Range	Tier	What defines it	Purpose
EncorePro 300 ◂ this product	entry	light build, QD and USB	volume deployment in a call centre
EncorePro 500	mid	voice tube, convertible wearing	more demanding acoustics
EncorePro 700	top	the top contact centre tier	key workplaces
Blackwire 3200 and 3300	office	USB, controls on the cable	an ordinary office, not a call centre
Savi 7300 Office	wireless	DECT with a desk base	a call centre without a cable

What to verify before ordering and deploying

Cable or adapter: required with a QD code, without it the customer cannot connect the headset
What it plugs into: a computer, a desk phone or both, and accordingly a DA, a plug cable or an MDA
Agent movement: if they leave the desk, QD; if they stay put, USB is simpler
Inline controls: only the USB-A and USB-C versions have them, the QD version does not
Configuration: monaural when the agent needs to hear colleagues, stereo when the room needs shutting out
Consumables: agree the supply of spare ear cushions upfront, in shift work they wear out fast

The atlantis team helps with every point. From picking the adapter or cable by phone, through choosing the configuration, to supplying consumables.

Management and services

Poly Lens: on the USB versions inventory, bulk settings and firmware updates; the QD version is managed through the attached adapter or switch
Poly+ Partner: local support from an experienced certified team in Czech, by phone, chat, web and video call, priority device replacement in which the manufacturer ships the replacement part the next business day and pays the shipping, all under the terms of the programme and for its whole validity, so care can continue even after the warranty ends
atlantis deployment: designing the headset plus adapter combination for the workplace, bulk configuration and training the agents

Warranty

Standard two-year limited HP Poly warranty. Extended support with expedited replacement is provided by the Poly+ Partner programme.

Frequently asked questions

Can I plug the headset straight into a computer?

No. This code has a QD connector, that is a break-away, not USB. It needs a DA75, DA85 or DA85-M adapter, or an MDA switch. If you want to plug in directly, order the USB-A or USB-C version.

What is the QD connector good for?

The agent disconnects with one click and leaves the desk without taking the headset off. At the same time one headset outlives several generations of phones, because only the cable changes. The connector is rated for more than 30,000 disconnects.

Why is the driver bandwidth only 150 Hz to 6.8 kHz?

It is deliberate. The band is tuned to the human voice, which improves intelligibility in a contact centre. The USB versions have a wider band, 20 Hz to 10 kHz, because they also play the computer's system sounds.

Does the headset have volume control?

The QD version does not, control is handled by the attached adapter, switch or phone. Control on the cable itself belongs to the USB-A and USB-C versions only.

What does the TAA version mean?

It is compliance with the US Trade Agreements Act, which matters for supplies into US government structures. All six EncorePro 300 codes we carry are TAA versions.

Manufacturer: Poly (Plantronics)
Weight: 0.11 kg
Headset type: Cable
A headset designed for: Desk phone, Mobile phone, Computer, Tablet
Connector type: QD
Structural design: Binaural (for both ears)
Way of wearing: Head clip
Speaker frequency range (Hz) - minimum: 200
Speaker frequency range (Hz) - maximum: 6800
Microphone type: Directional microphone (Noise Canceling)
Microphone boom length: Long
Microphone arm mobility: Rotates 270°
Material of the earrings: Foam earpad

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