true 5.8 GHz phones?

Discussion in 'General Discussion' started by jhowarth, Jul 13, 2007.

  1. jhowarth

    jhowarth Network Guru Member

    I am considering replacing my 2.4 GHz cordless phone with a 5.8 GHz model to eliminate a local source of interference for my WRT-150N wireless router. However I have read that many 5.8 GHz cordless phones use 2.4 GHz for transmissions back to the base station in order to conserve the handset batteries. Does anyone know of any particular models of 5.8 GHz cordless phones that are true 5.8 GHz in both directions? Thanks in advance for any information.
  2. ifican

    ifican Network Guru Member

    I have not actually heard of this issue though i have replaced 2.4ghz phones to fix this very problem. The current phone i have at home that resolved this problem and has no issue working consecutively with any wireless device i have running is a Panasonic KX-TG5050W.
  3. jhowarth

    jhowarth Network Guru Member

    One place this information can be found is at Specifically the section...

    When 5.8 GHz phones were introduced, the allowable wattage was not increased—and here is where the buyer must beware. Because transmitting signals at a higher frequency requires more power, some 5.8 GHz phones use the new frequency only for the base-to-handset transmission. Then, to make sure a handset’s battery has a reasonable life, handset-to-base transmissions are sent on the older 2.4 GHz frequencies.
  4. jhowarth

    jhowarth Network Guru Member


    One must be careful when looking to purchase 5.8 GHz phones. In actuality, only high-end 5.8 GHz hardware transmits both ways on that frequency. Most so-called 5.8 GHz cordless phones transmit from base to phone on the 5.8 GHz and transmit from phone to base on 2.4 GHz or 900 MHz to conserve battery life inside the phone.

    from So far the Panasonic phones I have looked at only mention 5.8 GHz in the owner manual's specification. One would like to think that is accurate.
  5. Slimey

    Slimey Network Guru Member

  6. jhowarth

    jhowarth Network Guru Member

    Actually I'm thinking about getting a DECT 6.0 phone system instead since that runs on 1.9 GHz. Any opinion on those?
  7. t4thfavor

    t4thfavor Network Guru Member

    I would just like to say that I have 2 5.8Ghz phones, Not cheap ones either, and they both suck royally. Forget taking it outside, even close to the house the signal is unreliable and static ridden(no I don't have aluminum siding). Also in my basement the signal sucks as well. and only works on one side of the house.

    Let it be known that the 2.4Ghz phone it is replacing(barely) caused my wireless network no interference, and I always got a solid connection. So what I am trying to say is that your problem is likely caused by your neighbors, and not your phone.

    Just move them farther away from each other and call it good.
  8. ifican

    ifican Network Guru Member

    I still will say that old realiable that i listed earlier has been a great phone for me, I can walk down to the trash cans behind the house, perhaps 150-200ft from the base, yes there is a little static but it still works and it does not affect any wireless device in the house. Ok maybe static isnt the best word, you can tell its getting really close to the end of its range.
  9. t4thfavor

    t4thfavor Network Guru Member

    That was my old 2.4Ghz phone, it worked great until someone left it outside, in the rain, overnight... So without doing any research, and not thinking about what I was doing I got a 5.8Ghz phone. Man I wish I would have thought twice.
  10. jhowarth

    jhowarth Network Guru Member

    I read somewhere that the 5 GHz wireless signal doesn't go as far as the 2.4 GHz signal in most environments. The argument was that this was net 'good thing' since there was less interference at 5 GHz and the restricted distance helped minimize interference from other base stations.
  11. stangri

    stangri LI Guru Member

    Oh man, DECT is great -- my mom has Siemens DECT phone hooked up to the WRTP54G in her place and it works wonders.

    Regarding the 5GHz, my friend used to work for a major wireless phone vendor, writing software for their phones. More than once he has mentioned that some of the phones shipped as 5Ghz phones only supported 5GHz one way (base to phone) due to the higher battery consumption. Not sure I remember correctly what they've used to transmit back to base. What I'm trying to say -- unless you have an equipment to monitor those frequencies, don't trust what the box reads.
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