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Using multiple wireless keyboards/mice

By paulk42 ·
I am installing workstations in a dentist's office that has five operatories (cubicles for working on patients) that have solid partitions between them with openings at each end. The dentist wants to use wireless keyboard/mice to control the computers installed in each operatory. We have installed Microsoft Multimedia wireless keyboards and mice in each operatory. The receivers are at one end of the operatories, about eight foot from the locations of their respective keyboard & mouse and eight feet from each other with the wall between. Problem is that the keyboards and/or mice interfere with each other after a very short time. I can find no information on the Web dealing with use of multiple wireless units in close proximity like this. Has anyone had success in a similar situation?

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Using multiple wireless keyboards/mice

by sgt_shultz In reply to Using multiple wireless k ...

well, if i had that problem with wireless access points I'd change each one to be on a different channel. don't know if you can do that with mice etc...wonder if you could rig up something to attenuate the signal. wonder if mixing brands would help...wonder if ir would work better...or at all...thanks for writing this question in as it is a valuable heads up....

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Using multiple wireless keyboards/mice

by GuruOfDos In reply to Using multiple wireless k ...

It stands to reason that they will clash!! They have a range of up to 50m and all use the same frequency channels and encoding method. Using Logitech or Medion units with switchable channels MAY help but it depends on the proximity. Most units have a button to 'search' for an active transmitter but there is no definitive way to check which channel each is using. IR would be better for you as there is no 'line of sight' between the cubicles. Alternatively, consult a radio/electronics engineer who may be able to change the frequencies of units by changing a crystal, similar to using different RC 'channels' for model aircraft by changing to different coloured crystals. In the UK, all wireless short range devices must use either 418MHz or 458MHz (438Mhz in continental Europe)with a maximum range of 100 metres. These transmitters and recievers have SAW (surface acoustic wave) filters rather than interchangeable crystals to determine their operating frequency and so require digital encodingto define channels, i.e. the data is encoded so an address is sent with the data. Only a packet containing the correct address is decoded by a particular reciever with the matching code. I have used two wireless keyboard devices side by side by changing the SAW filters (fiddly job with tweezers and a fine soldering iron) but 5 different frequencies is decidedly 'out'!!

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Using multiple wireless keyboards/mice

by djent In reply to Using multiple wireless k ...

Bad idea! You should network computers not keyboards. Even if you get it working the potential for crashes and data loss are too great. Does the operator work blind or do you have multiple monitors? Is the application multiuser and how many sessionsare open concurently? How does the application differentiate users and direct data to the correct session? These are all functions of a network OS and multiuser applications. How does multiple keyboards replace these functions?

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Using multiple wireless keyboards/mice

by kdrungilas In reply to Using multiple wireless k ...

I think you have big problems with both the wireless keyboards and wireless mice.....but, there may be some solution out there if this is really what you want and have sold the dentist on having. So far, Logitech is the only mfg I've found that makes (lucky for you) an 8-channel mouse receiver. Its their Cordless MouseMan 1,M-RA12 Cordless MouseMan model and has frequencies of 1: 144.56 KHz, 2: 136.53 KHz, 3. 129.35 KHz, 4: 122.88 KHz, 5: 117.03 KHz, 6: 111.71 KHz, 7: 106.85 KHz, and 8: 102.40 KHz. So, I'd say it would be possible to use that one model in all your operatories only IF each used a different channel AND IF those channels were not used by the wireless keyboards.

Microsoft doesn't list a wireless keyboard on their supportsite so I cannot find a frequency for that (tho your technical docs might say)and MS does list several different types of wireless mice listed, but you didn't specify if yours were optical or not.

So, I think I've only been able to answer one-half of your question. You could always return the keyboards for normal ones and run extra long wiring up along the ceiling, down through cabinetry and into the keyboard.

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Using multiple wireless keyboards/mice

by kdrungilas In reply to Using multiple wireless k ...

So, Have you purchased and installed the Logitech mice by this date? Are they working or have you found another solution?

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Using multiple wireless keyboards/mice

by paulk42 In reply to Using multiple wireless k ...

Point value changed by question poster.

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Using multiple wireless keyboards/mice

by paulk42 In reply to Using multiple wireless k ...

The answer in my particular situation is to install KVM Extenders in each operatory. Found them at www.aten.com, click "KVM" button and "Extenders" on drop-down list. They consist of two connectors with video and PS2 ports and are connected together with Shielded Cat-5 cable. Can be separated up to 500'. This isn't a solution when several users in close proximity want to use wireless keyboards/mice. Looks like the Logitec solution would work there though. Thanks to all who answered.

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