Cyberborean Chronicles

3G networks

My house is in the area where the best internet is wireless. My main channel is a satellite broadband, it’s fast enough (up to 4 Mbps) and cheap. In general, I like it. The only problem is that it is one-way downlink – it needs an outgoing channel for requests tunneling and uploads.

So far, it was GPRS. Very slow, very expensive and unstable. It’s not a secret that GPRS internet traffic has lowest priority in GSM networks. So, sometimes it shuts down because of voice traffic overload. I was annoyed and was looking for an alternative.

So, it was a really good news about CDMA/EV-DO coverage. I’ve brought CDMA modem to test and it works well. There is drastic difference from GPRS. An average time of ping latency in the satellite tunnel is reduced in 4-5 times (from 600-800 to 150-200 ms), so web surfing is smoother and faster now. The speed test shows about 600 Kbps for download (satellite channel was turned off, so it’s CDMA real speed) and 80 Kbps for upload. It saves money also – the megabyte is 4 times cheaper there than on GPRS.

The modem

It is Anydata ADU-E100 USB-modem on Qualcomm chipset:

There is a special software for Windows, so I worried a bit how it would work in Linux. As it turned out, it needs nothing in my Feisty. I just plugged the modem in and immediately found it as ‘/dev/ttyUSB0’. After some PPP configuration (dial number and account data) i got it working in minutes.

The modem can be powered from few supplies – USB, external 5V supply or from the battery in its cradle (if I would buy a laptop someday). It’s small, light and thin, especially without the battery:

The external antenna socket is a great thing. With the antenna outdoors I found it working much more stable and fast.

They told also it can work as a CDMA phone with an external headset (a Motorola one is compatible) and send/receive SMS. But it seems those features are available with AnyData proprietary software (Win32-only). All in all, they are not my most wanted features.

5 Responses to “3G networks”

  1. Ing. Dietmar Resch · May 29, 2007 at 12:50 pm · Reply

    Hello!

    What is the name of the external antenna connector of the Anydata ADU-E100 Modem and where can I buy this connector?

    Thank you,

    Dietmar
    kontakt@antennenshop.at

  2. Alex · May 29, 2007 at 12:59 pm · Reply

    The connector is labeled “RADIOLAB RG-174A/U”

  3. DAL · August 22, 2007 at 3:53 am · Reply

    i need an external antenna for mine but dont know what i’ll need. Is RADIOLAB RG-174A/U a connector type? where can get the antenna, cables and connector or at least where can i start looking?

  4. Alex · August 22, 2007 at 10:07 am · Reply

    DAL: Try to contact your local CDMA provider. Some of them have their own shops and could help you to choose antenna for your conditions. I bought the full kit (modem, antenna and cables) in a provider’s shop. And had free account registration as a bonus.

  5. Ing. Dietmar Resch · September 12, 2007 at 7:38 am · Reply

    If somebody needs pigtails (cable adaptor for antenna) for this modem or an external antenna, please contact me at kontakt@antennenshop.at

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