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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
PMM5544 OEM Acoustic ModemThe PMM5544 is a high performance underwater acoustic modem enabling robust communication, voice capability, and scientific data collection. PMM5544 Features: Long Range Acoustic Communication: 18 km depending on transducer, conditions, and modulation selected. Flexible Data Rates: 80 bps to 10,240 bps depending on the selected modulation scheme. Precise Acoustic Ranging: High accuracy ranging capability (<0. 3 m). Low Power Wake Up: Energy efficient
The PMM5544 is a high-performance underwater acoustic modem enabling robust communication, voice capability, and scientific data collection.
PMM5544 Features:
- Long-Range Acoustic Communication: 1–8 km depending on transducer, conditions, and modulation selected.
- Flexible Data Rates: 80 bps to 10,240 bps depending on the selected modulation scheme.
- Precise Acoustic Ranging: High-accuracy ranging capability (<0.3 m).
- Low Power Wake-Up: Energy-efficient standby operation with rapid activation.
- Customizable Linux Platform: Supports APIs for Python, MATLAB®, C++, JSON, JACK, and Socket integration.
- Simultaneous 4-Channel Hydrophone Input / 4-Channel Output: Unique to the PMM5544, this allows multi-channel sample-synchronous acoustic processing for integrating advanced sensing, beamforming, and detection applications.
- Integrated Single Sideband Voice: Includes SSB voice communications with adaptive squelch, VOX, and noise cancellation.
- High-Speed Dual-Core ARM Processor: Dual-core 1.4 GHz Arm® Cortex®-A53 processor for rapid data processing and efficient onboard control.
- Multiple Connectivity Options: Gigabit Ethernet, RS-422, and RS-232 interfaces for easy integration.
- Onboard Storage: 64 GB internal storage, expandable via microSD.
Optional Specialized Features (License Required):
- JANUS Support: Enables interoperable underwater communications using the NATO ANEP-87 standard.
- Phorcys Stheno + Euryale: Adds secure Phorcys communications with Stheno (20–28 kHz) and Euryale (8–12 kHz) capability. Euryale requires a compatible low-frequency transducer.
- MARIA: Unlocks the Marine Acoustic Rapid Innovation Architecture for custom acoustic algorithms, PCM data access, and advanced hardware control.
Technical Details:
Download the technical specifications sheet at www.popotomodem.com/documentation for more in-depth information.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 728 reviews
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Product Reviews
★★★★★ 5
I love this brand. These shoes look and fit great!
Size: 13 Wide, Color: Black/White/Black
I love wearing Cole Haan shoes. This is the second pair I’ve owned and the style just gets me. I’ve worn these to work at a great professional job every day, not just casual Friday. I wear these when I head out shopping or to dinner. They are functional, comfortable, built for regular and bigger wider feet and comfortable. I am 6 feet tall and my feet have changed size over the years to me needing a wider shoe to relieve pressure on my toes and front wide porting of my foot. So the 13W feels great and still walks the same as a regular 14 but more comfort for me. They look amazing and qualify in some offices as dress shoes (depending on company rules they will justify a sneaker as a shoe with the tan colored “gum” sole as a sneaker) so check company policy. The black sole on this makes it look more dressy. I am switching out the laces to match my previous Cole Haan because I think the white shoelaces look better. As an adult, aside from my Kenneth Cole boots Reaction boots and Doc Marten’s these are the only shoes I will pay 3 digits for. This looks like skater shoes but with a more mature look.
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Reviewed in the United States on December 19, 2025
★★★★★ 5
I am certainly glad I found them and finally ordered
Size: 10, Color: Ivory/White/British Tan
A bit bulkier than my Stan Smiths Leather versions, but actually more comfortable.
They seem to be a bit "clunkier" looking than a streamline Stan Smith, but it's a matter of style. It works for a change of pace.
Gets or picks up dirt a bit, but cleans well, except the canvas part.
Has lasted almost 6-8 months with very little signs of wear.
Feels very secure in any type of weather or condition.
Great alternative or addition to having a pair of Stan Smiths.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Amazing shoes
Size: 10.5 Wide, Color: Black/White/Black
Amazing shoes
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Reviewed in the United States on May 31, 2026
★★★★★ 4
Love the look, but Narrow
Size: 10, Color: Marine Blue/Woodbury/Ivory
What is for my son-in-law, he loves them, but had to switch them out twice because they run very narrow. He doesn’t have a wide foot at all so be careful when you purchase. Other than that they are a good looking shoe and he really likes them.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Awesome value shoes
Size: 11.5, Color: Ivory/White/British Tan, Size: 11.5, Color: Ivory/White/British Tan
These white Cole Haan shoes are just what I hoped for, the color is a perfect off-white, somewhere between cream and pure white, which gives them a more refined look. The quality feels excellent, they’re very comfortable right out of the box, and the laces feel durable and well-made. They fit true to size with no issues. Based on this experience, I’ll definitely be buying more from this brand in the future especially at this price point.
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Reviewed in the United States on June 18, 2025