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2309-825-109
Biz 2300 QD Duo Siemens - Headset - Head-band - Office/Call...
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2309-825-109-Biz 2300 QD Duo Siemens - Headset - Head-band - Office/Call center - Black - Binaural - 1.075 m is a professional-grade wired binaural headset designed specifically for use in high-performance office and call center environments. Featuring a comfortable headband form factor and dual earpieces, this headset delivers stereo audio output for clear conversations and superior noise isolation, making it ideal for Unified Communications (UC), call handling, and conferencing workflows where productivity and clarity are essential.
This model connects via Quick Disconnect (QD) interface for reliable plug-and-play connectivity with Siemens telephony systems and select compatible desk phones. The Biz 2300 QD Duo integrates a noise-canceling condenser microphone optimized for voice communications, supports a frequency response of 100 Hz – 10 kHz for wideband audio, and leverages digital signal processing (DSP) for acoustic protection and enhanced call clarity. Its robust build, lightweight design, and 1.075 m cable make it suited for day-long professional use in boardrooms and call center deployments requiring consistent, high-quality voice transmission.
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| 2309-825-109 |  2486-825-209 |  4993-823-109 |  2393-829-189 |  24089-889-899 | |
|---|---|---|---|---|---|
| Product Type | Headset | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment |
| Audio Device Type | Headset | Headset | Headset | Headset | Headset |
| Microphone Type | Condenser | Condenser | Condenser | Condenser | MEMS |
| Form Factor | Head-band | Portable | Portable | Headset | Portable |
| Use Case | Office / Call Center / Unified Communications | Unified Communications / Conference Room / Contact Center / Office | Unified Communications / Conference Room / Meeting Spaces / Call Center | Unified Communications | Unified Communications / Conference Room / Office / Remote Work |
| Channel Configuration | Stereo | Mono | Mono | Mono | Mono |
| Connectivity | Quick Disconnect (QD) | 3.5mm / Quick Disconnect (QD) | USB | USB-C | USB-C |
| Output Types | Quick Disconnect (QD) | 3.5mm | USB / 3.5mm | USB-C | USB-C |
| Frequency Response | 100 Hz – 10 kHz | 80 Hz – 16 kHz | 150 Hz – 7 kHz | Speaker: 100 Hz – 10 kHz; Microphone: 150 Hz – 6.8 kHz | 20 Hz – 20 kHz (Speaker), 100 Hz – 8 kHz (Microphone) |
| Signal Processing | DSP / Acoustic Shock Protection / Noise Cancellation | DSP / Noise Suppression | DSP / AEC / Noise Suppression | DSP / Noise Suppression | DSP / AEC / Noise Suppression |
| Control Interface | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons |
| Wireless Support | No | No | No | No | No |
| Product Name | 2309-825-109-Biz 2300 QD Duo Siemens - Headset - Head-band - Office/Call center - Black - Binaural - 1.075 m | Jabra BIZ 2400 II Mono 3-1 NC WB Balance | Jabra Evolve 20 MS Mono | Jabra BIZ 2300 Mono USB-C UC | Jabra Evolve2 40 USB-C UC Mono |
| Height | 7.2 | 7.1 | 6.46 | 6.6 | 7.7 |
| Width | 6.1 | 5.5 | 7.36 | 5.6 | 6.1 |
| Depth | 2.0 | 2.3 | 2.32 | 1.6 | 2.2 |
| Weight | 0.12 | 0.13 | 0.22 | 0.115 | 0.42 |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
QD duo headset with reliable clarity and strong build quality.
Comfortable dual-ear fit and dependable wideband audio.
Excellent microphone pickup in busy call centers.
Durable design for high-volume professional environments.
Consistent performance and reliable desk phone integration.
The Biz 2300 QD Duo Siemens headset offers binaural wearing, superior noise-canceling microphone, durable headband design, 1.075 m Kevlar-reinforced cable, and Quick-Disconnect (QD) compatibility with leading office phone systems.
The precision-tuned microphone filters out background noise and emphasizes the speaker’s voice, ensuring crystal-clear communication even in busy office or call-center settings.
The Quick-Disconnect (QD) plug works seamlessly with major brands such as Avaya, Cisco, Siemens, Panasonic and other RJ-9 phone systems when paired with the appropriate adapter.
Yes, the lightweight head-band design and soft leatherette ear cushions provide ergonomic comfort and balanced weight distribution for extended wear.
The headset includes a 1.075 m Kevlar-reinforced cable plus a 1.5 m coiled cable (total extended length up to 2.575 m), offering ample freedom of movement.
Built with reinforced stress-points, a steel headband and Kevlar-strengthened cable, this headset is engineered for high-traffic office and call-center use.
Yes, both ear cushions and foam microphone covers are user-replaceable and available through authorized Siemens accessory channels.
This model is binaural only, providing stereo audio for enhanced clarity, noise isolation and professional call-center performance.
The Quick-Disconnect (QD) mechanism allows fast and secure plug-and-play removal from your phone base without shutting down your call.
This headset comes with a two-year manufacturer warranty covering defects in materials and workmanship under normal office use.
Simply slide the adjustable headband up or down to achieve a secure, comfortable fit that aligns the microphone boom at the corner of your mouth.
The headset delivers a wideband audio frequency range of 150 Hz to 6.8 kHz, ensuring clear, natural-sounding voice reproduction.
Yes, when used with a compatible QD-to-USB or QD-to-3.5 mm adapter, it performs reliably with VoIP softphones and unified communication platforms.
Wipe ear cushions and headband regularly with a mild disinfectant wipe, avoid harsh chemicals, and replace worn foam covers to maintain hygiene and audio quality.
Its robust build, exceptional noise cancellation, ergonomic comfort and quick-disconnect feature deliver reliable, fatigue-free performance in high-volume call environments.
United States
