Poly CS540A D2 HS +DCH-C EMEA-INTL English Loc-Eur
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Poly CS540A — a very light wireless DECT headset with a base for a desk phone only. The headset weighs 21 g and can be worn three ways. A run-out range, new deployments belong to the Savi range.
DECT 1880 to 1900 MHz
Range up to 120 m
Up to 7 hours of talk time
Headset weight 21 g
Desk phone only, RJ-11 connector
One-year manufacturer warranty
Order code | Model | Lifter in the box | Platform |
|---|---|---|---|
C9EN4AA#ABB | CS540A (this product) | no | universal |
C9EN5AA#ABB | CS540A with lifter | yes, mechanical | universal |
Note that this base connects a desk phone only. It has wireless DECT and a wired RJ-11 interface, so no USB port for a computer and no Bluetooth for a mobile. A computer or a mobile is served by the Savi and Voyager ranges.
Key features
Base for a desk phone, connected by a cable with an RJ-11 connector
Headset weight 21 g, convertible wearing in three styles
Range up to 120 m and up to 7 hours of talk time
Noise cancelling microphone and enhanced digital signal processing
Choice of narrowband mode for longer battery life or wideband for voice quality
Up to four headsets can be conferenced on a single base
SoundGuard hearing protection, sound limited below 118 dBA
Description
The lightest headset we offer
The CS540A weighs 21 g. It is the lightest wireless headset we carry and that is exactly its point. It is worn in three ways, on a headband, on an earloop or on a neckband, so every user finds a style that still suits them after eight hours. For receptions, surgeries and workplaces where the headset is worn all day and the calls are strictly on a desk phone, it still does its job well.
A desk phone and nothing else
The CS540A base has a single interface, a telephone cable with an RJ-11 connector. It has no USB or Bluetooth interface. That is the fundamental difference from the Savi ranges, which serve a computer, a desk phone and a mobile. If the customer calls from a computer, whether from Teams, Zoom or a softphone, the CS540A is not for them. Automatic call answering also needs a lifter, either an electronic EHS chosen by phone brand or a mechanical HL10.
A run-out range worth topping up
The CS540A is a run-out range. New deployments belong to the Savi 7400 or 8400, which serve a computer and a mobile besides the desk phone and carry a two-year warranty. We carry the CS540A for customers who already run it in volume and need to add units matching the same spare parts, ear cushions and batteries. The warranty on this range is one year, not two years as on the Savi range.
Strengths and limits
Strengths
Weight of 21 g, the lightest wireless headset we offer
Three wearing styles in one box, the user picks
Range up to 120 m and up to four headsets conferenced on one base
Long-term availability of consumables, batteries and ear cushions
Limits and what to tell the customer
The base connects a desk phone only. It has no USB or Bluetooth interface, so it serves neither a computer nor a mobile.
The warranty is one year, the Savi ranges carry two years.
The lifter is not included in the base variant. Without it the call is answered by hand on the phone.
It is a run-out range. New deployments belong to the Savi 7400 or 8400.
⚑ atlantis note
The first question is where the customer calls from
With the CS540A the quote is decided by a single question. If the customer calls strictly from a desk phone, the CS540A is fine. The moment Teams, Zoom or a softphone on a computer comes up, go straight to the Savi 7400 or 8400. Adding a separate computer headset next to the CS540A costs more and the user ends up with two headsets on their head.
Settle the lifter at quotation time
A headset without a lifter can only carry the call, not answer it. The customer still reaches for the phone and the benefit of a wireless headset is lost. The C9EN5AA#ABB variant has a mechanical lifter in the box. If the phone supports an electronic lifter, pick an EHS by brand instead, it is the tidier solution.
The range figures differ
For the same code there is also a figure of both up to 120 m and up to 350 ft, which is about 107 m, and on the product page up to 400 ft from the base. The values do not match. For design we recommend planning with a substantially lower figure, because all of these apply to open space, not to an office with partitions.
Who it suits
Recommended use | a wireless DECT headset with a base for a desk phone, with convertible wearing and a noise cancelling microphone |
|---|---|
Position in the portfolio | wireless DECT headsets for desk phones, run-out CS500 range |
How it differs from the Savi range | it is markedly lighter at 21 g, but the base serves a desk phone only and the warranty is one year instead of two |
Suitable
Receptions, surgeries and workplaces where calls are made strictly from a desk phone and the headset is worn all shift. Topping up units at a customer who runs the CS540A in volume.
Verify
Whether the customer also calls from a computer, in which case the Savi range applies. The desk phone brand for the lifter type. Whether they stock the same batteries and ear cushions. Whether a one-year warranty is enough for them.
Consider another model
Savi 7400 or 8400 Office for new deployments and for a computer and a mobile, Savi 7300 Office for a computer and a desk phone, EncorePro for a corded contact centre.
The “Verify” and “Consider another model” cards come from the experience of the atlantis team.
What the base connects
Desk phone
By RJ-11 telephone cable
The interface cable is in the box. Automatic call answering additionally needs a lifter, either an electronic EHS by phone brand or a mechanical HL10.
RJ-11
cable in the box
Computer
The base does not connect one
The base has no USB interface. Calling from a computer is served by the Savi Office range or the Savi UC range with the D400 adapter.
Savi ranges only
Mobile phone
The base does not connect one
The base has no Bluetooth. A mobile is served by the Savi 7400 or 8400 range, or by a Voyager Bluetooth headset.
Savi and Voyager ranges only
Supported operating systems are Windows 11, Windows 10 and macOS. The base, however, has no USB interface, so a computer cannot be connected to the headset.
Range and battery life
Environment | Range | When to count on it |
|---|---|---|
Open space | up to 120 m | hall, warehouse, premises without partitions |
Conferenced headsets | up to 4 on one base | training a colleague, two people listening to a call |
Security | Secure DECT link | specific encryption parameters are stated for the Savi 7300 range |
Wireless technology | DECT, 1880 to 1900 MHz band |
|---|---|
Battery type | rechargeable battery pre-installed in the headset, spare part code 85Q98AA |
Talk time | up to 7 hours |
Audio and microphone
Configuration | mono, convertible, headband, earloop and neckband in one box |
|---|---|
Microphone | noise cancelling |
Active noise cancelling for listening | Do not count on it for this range; active noise cancelling is offered by the Savi 8200 or 8400 range |
Bandwidth | 20 Hz to 6.8 kHz, optionally narrowband mode for longer battery life or wideband for voice quality |
Signal processing | enhanced digital signal processing and adaptive transmit power management |
Hearing protection | SoundGuard, acoustic limiting of sound below 118 dBA |
Headset weight | 21 g |
Base connection | RJ-11 only |
Colour | black |
What is in the box
In the box
Wireless headset with a pre-installed battery
Office base
AC power adapter
Headband
Telephone interface cable
Kit with eartips and earloops
Not included
Handset lifter, an electronic EHS by phone brand or a mechanical HL10; the C9EN5AA#ABB variant has a lifter in the box
Spare battery and ear cushions
Poly+ Partner service programme
Order it with the headset
Electronic handset lifter EHSby phone brand
Without it the call on the desk phone is answered by hand. We pick the right type by the phone.
Mechanical lifter HL10784Q2AA
The solution for phones for which no electronic lifter exists.
CS540 battery85Q98AA
A consumable with all-day wearing, a newer EU version 784Q3AA#ABB is also carried.
CS540 leatherette ear cushions85Q20AA
Two pieces, a consumable on headsets worn all shift.
Variants and products in the range
Range | Generation | What it connects | Purpose |
|---|---|---|---|
Savi 8400 Office | current | computer, desk phone, mobile | new deployments |
Savi 7400 Office | current | computer, desk phone, mobile | more affordable current range |
Savi 8200 Office and UC | previous | depending on the branch | topping up an installed base |
Savi 7300 Office | previous | computer and desk phone | contact centres, topping up a base |
Savi 7300 UC | previous | computer only, via the D400 adapter | workplaces without a desk phone |
Poly CS540A ◂ this product | run-out | desk phone only | older installations at desk phones |
What to verify before ordering and deploying
Where calls are made from: if also from a computer or a mobile, this base cannot do it and the Savi range applies
Lifter: pick it by phone brand, an electronic EHS or the mechanical HL10 in the C9EN5AA#ABB variant
Generation: the CS540A only to top up installed units, otherwise the Savi 7400 or 8400
Range: HP's figures apply to open space, in an office plan with a substantially lower figure
Warranty: one year, the Savi range carries two years
Consumables: verify whether the customer stocks CS540 batteries and ear cushions
The atlantis team helps with every point. From verifying what the customer already runs, through picking the lifter by phone, to supplying consumables.
Management and services
Poly Lens: support is limited on this run-out range, handle firmware and settings through the tools supplied with the base
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: verifying what the customer already runs, picking the lifter by desk phone, pairing the headset with the base and training the users
Warranty
Standard one-year limited HP Poly warranty. The Savi range carries a two-year warranty. Extended support with expedited replacement is provided by the Poly+ Partner programme.
Frequently asked questions
Can I connect the headset to a computer?
No. The CS540A base has wireless DECT and a wired RJ-11 interface, so no USB port. Calling from a computer is served by the Savi Office range or the Savi UC range with the D400 adapter.
Is the handset lifter in the box?
Not with code C9EN4AA#ABB, that one contains only the telephone interface cable. A mechanical lifter is in the box of the C9EN5AA#ABB variant. For phones that support an electronic lifter we recommend an EHS by brand instead.
What is the real range?
The range figures in the source data differ: up to 120 m, elsewhere up to 350 ft, which is about 107 m, and up to 400 ft from the base. All of them apply to open space. In an office with partitions plan with a substantially lower figure.
How long does it last on one charge?
Up to 7 hours of talk time. We carry the spare battery under code 85Q98AA, a newer EU version 784Q3AA#ABB is also carried.
Is the CS540A still current?
No, it is a run-out range. New deployments belong to the Savi 7400 or 8400, which serve a computer, a desk phone and a mobile and carry a two-year warranty. We carry the CS540A for customers who already run it and top up units matching the same consumables.
- Manufacturer
- Poly (Plantronics)
- Weight
- 0.4 kg
- Headset type
- Wireless
No attachments available.
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