19 thoughts on “Review: ZyXEL VoIP WiFi Phone”

  1. These phones are the same as the Pulver Innovations WiSIP and at least one other brand that isn’t sold outside of the Asian market. It does NOT hand 802.11g — you must have your access point running in b+g mode. Your review doesn’t mention WEP. Yeah, I know it’s not really that secure but if you enable it you’ll lose audio quality with 64-bit WEP and the phone will be completely useless with 128-bit WEP. The phone’s processor can’t handle the encryption along with everything else. There are other WiFi phones on the market and most of them suck. The only exception I’ve seen is Cisco’s WiFi phone but it’s nearly three times as expensive. I have a Pulver Innovations WiSIP and it’s probably the worst piece of garbage you can buy for $250.

  2. hey – thanks for the update. i am not sure about “g” handling and you might be right. i have an apple airport which can handle both b+g and as a result i did not experience any problems. same for the t-mobile hotspots as well. it handled WEP quite well and had no loss of quality or anything. I have not used the Pulver WISP so I will take your word for it.

  3. Sorry that i am a bit of topic here.
    I am looking for technical writer who is compute savvy.
    I like how you put your words together. If you are interested could you email me your rates.

  4. VOIP over WiFi is still very unpredictable, QoS is a major issue and most access points can’t handle the encryption and DSP. I have tested most commercial access points and WiFi phones including Spectralink’s and Cisco and they still have issues in the handoff area Don’t forget about the ‘bandwidth” requirement of VOIP.

  5. How would I go about accessing hotspots networks in Europe ? upon paying for the hourly access you get a username and a code to use on their shell application screen.

  6. i guess that’s the problem. you will have to sit and use that name and password. and re enter it next time as well. these devices are mostly good for the home, or office envinronments

  7. Om-

    Can you provide me the proper SIP proxy IP address you obtained from Vonage to connect the above mentioned ZyXel phone using my SoftPhone account?

    Thanks in advance.

  8. I’m trying out one, and am finding many of the same pros and cons as in the review. One thing not mentioned, however, is the keyboard quality. It’s awful. The keys can click without having the key actually go trough, and you always have to keep your eye on the display to verify that you’re typing right.

    One other thing I notice is that my ear is getting quite warm. Must be alot of radiation coming from the thing.

    I think I’ll go with a conventional phone over an adaptor box. VoIP itself is certain to go far and wide – will be a lot of fun!


  9. VOIP over WiFi is clearly the next IT thing – however it is unclear whether it will be possible to service more than 10 clients on the same 802.11b Access Point.

    Studies indicate that while VOIP may work fine within the confines of a one hop network (Access Point wired to Ethernet), it may not work so well in a multi-hop network – as in out door mesh networks.

    This has to do with bandwidth degradation with hops for conventional mesh networks and the inverse relationship between bandwidth and latency.

    For more see:


    Francis daCosta


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  11. I just want to say thanks…I’m in Europe and was considering buying the
    ZyXEL VoIP WiFi Phone from a new ITSP to try with there service and skype-now I think I’ll wait and keep reading what write.

  12. In answer to the Skype question: Netgear will be making a WiFi phone for use with the Skype service. They have made a prototype and made at least one sucessful call with it. Further information about this phone is scarce. The official site is here: http://tools.netgear.com/skype/

  13. Hi all, i am an MSC student. All i want to know is which is the BEST SIP IP WiFi phone out there in market??

    I need it for my project and the company i am working with wants me to find out which is the BEST one to go for as later on i’ll be in trouble if its not performing well.

    I had a look on internet but couldn’t get a clear picture. All i want is to perform calls in different scenarios and to analyze them.

    I want a phone which is the perfect so far, shouldn’t have any problems or nearly shouldn’t have !!!

    Many thanks,

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