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Treo 650 WiFi Light with Reverse BT DUN

We may not (yet) have WiFi enabled on our Treo but there is another way to experience the joys of free wireless connectivity thanks to Reverse BT DUN.

Whereas the standard BT DUN (Bluetooth Dial-Up Networking) enables your PC to be online via the data connection on your Treo, Reverse BT DUN enables your Treo to be online via your PC’s broadband connection – thus the ‘reverse’ name.

Evidently, Reverse BT DUN is primarily intended for home and office use and cannot be accessed while on the go.

Full installation of Reverse BT DUN requires a number of settings on your PC, Treo and most likely also your router if you’re using one.

PC Settings
First you’ll need to setup your data connection for Internet Connection Sharing:

  • Go to Start > select and open Control Panel
  • Select and open Network Connections
  • Select the dial-up or broadband connection that you want to share – typically Local Area Connection
  • Right-click Local Area Connection > select Properties > Advanced tab
  • Under Internet Connection Sharing select “Allow other network users to connect through this computer’s Internet connection”
  • Click OK and your Local Area Connection should now say ‘Shared’ in Status

Router Settings
Please note that if after clicking OK you get and an error message saying "An error occurred while Internet Connection Sharing was being enabled. Internet Connection Sharing cannot be enabled. A LAN connection is already configured with the IP address that is required for automatic IP addressing.” you will need to change the Default Gateway on the router to (for example).  This is because your PC needs the which is typically set as default on your router.

I can’t provide you with exact instructions or settings for how to change the Default Gateway on your router but I do recommend that you check before making any changes.  In my case it took 45 minutes with Netgear’s fantastic customer support team to help me set this after I managed to loose all Internet connectivity.  I can tell you that it required running ipconfig /release and /renew commands but that’s about it.

Bluetooth Settings
Next you’ll need to setup Bluetooth for LAN Access and Personal Area Networking Service (I am assuming that your PC is already BT enabled and that you have already paired your Treo with it).  Depending on which Bluetooth adapter you’re using you’ll either go to Control Panel > Bluetooth or open the separate BT application installed to control the adapter.  In my case with the Lanso USB BT adapter, I had to:

  • Go to ‘My Services’ > Properties
  • Open ‘Personal Area Networking’ tab
  • Select ‘Auto-start this service’
  • Select ‘Work Mode’ > Set up Bluetooth Personal Area Network and Enable DHCP Server
  • Go to ‘Lan Access’ tab
  • Select ‘Auto-start this service’
  • Click Apply and OK then exit and restart your Bluetooth application

Treo Settings

  • Open the Prefs application
  • Select ‘Connection’ (Under ‘Other’ at the bottom)
  • You will see a number of ‘Available Connections’ and under this click ‘New’ then:
    • Name: change from ‘Custom’ to whatever you’d like (I chose Treonauts)
    • Connect to: [Local Network]
    • Via: [Bluetooth]
    • Device: [Tap to Find and select your PC]
  • Click OK then Done

Treo650reversebtdun01b Treo650reversebtdun02b Treo650reversebtdun03b

  • Select Network (Under ‘Communication’)
  • Open Menu > Service > select New
    • Service: name your service as you like
    • Connection: select the connection that you previously created
    • User Name + Password: leave blank
  • Select ‘Details’ at the bottom
    • Fallback: None
    • Idle timeout: Never
  • Select ‘Advanced’
    • Deselect ‘IP Address’ and ‘Query DNS’ and enter a fixed IP address and Primary DNS (this is required for Blazer and Xiino to work properly)
  • Press OK then Connect at bottom right.  If prompted, select ‘Yes’ when asked if you want your Treo to ‘Connect to the Internet’.

Treo650reversebtdun04b_1 Treo650reversebtdun05b Treo650reversebtdun06b

With all of these settings finally completed you should now happily be surfing the web or using other data applications on your Treo via your PC’s broadband connection.  For example, I’ve been very happily listening to streamed Shoutcast stations using Pocket Tunes Deluxe and my Reverse BT DUN connection.  I also wanted to test a VoIP solution but haven’t yet found one for our Treo (any tips?) and I’m still looking for other things that I might be able to do now. 

Also, please note that you’ll need to go back to Prefs > Network then select your normal carrier ‘Service’ to use your data connection again once you’re outside home or the office when you’re not connecting via Reverse BT DUN.

It certainly wasn’t the easiest thing to set up and it took me a couple of hours to get everything working but now that I have Reverse BT DUN enabled I am certainly enjoying my newfound free connectivity – I’ll call it Wifi Light.

Reverse DUN works!!! [Treocentral Forum]
Using reverse BT DUN w/ Treo 650 [PalmAddict]
Palm Bluetooth Guide [PalmZone]
Streaming Audio on your Treo with Pocket Tunes Deluxe 3.0 [Treonauts]

Treonauts want even more connectivity freedom

Posted by Andrew on July 29, 2005 at 11:56 AM

Treo 650 Tips , Treo Software | Bluetooth

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» Treo 650 and Reverse Bluetouth DUN from peerfear
Treonauts talks about reverse bluetooth dial up networking Whereas the standard BT DUN (Bluetooth Dial-Up Networking) enables your PC to be online via the data connection on your Treo, Reverse BT DUN enables your Treo to be online via [Read More]

Tracked on Jul 30, 2005 12:27:03 AM

» Treo 650 and Reverse Bluetouth DUN from peerfear
Treonauts talks about reverse bluetooth dial up networking Whereas the standard BT DUN (Bluetooth Dial-Up Networking) enables your PC to be online via the data connection on your Treo, Reverse BT DUN enables your Treo to be online via [Read More]

Tracked on Jul 30, 2005 12:27:51 AM


by E | Dec 15, 2006 10:07:10 PM

I just would like to point out something You Sorry SOBs did not mention and I had to find out all on my own. First off if you are trying to get reverse Bluetooth going it’s because you probably already have been spoiled by a Wi-fi connection so it stands to logic that most of you are running off a wifi router already. And you are not connecting. Well guess what. It’s because you're missing Softick PPP. Ver 2.10 or above.. “hint” “try com 16”. Most the hacks I did to my treo I had to figure out for myself because of the lack of support out there. For example Wi-fi works for me on my GSM phone. as well as a 4GB SDcard, Blazer 4.5, and a few other progs I took from the 680's rom, my treo's don't crash, am running a bunch of software including TomTom navigator 5,Docks to go, java and opera just to name a few. By the Way my CPU clocks up to 507MHZ & my ram has 20MB free all the time. Needless to say this thing smokes. But thanks everybody for not mentioning things like the Treo 650 rom tool v1.0.0.0 and having all the poor saps out there try to understand how in the hell shadowmite’s ridiculously complicated Rom tool works. Screw the 680 a hacked 650 is a serious force to be dealt with that the 680’s extra ram and stronger Bluetooth just don't make up for. My 650 is doing everything it can do faster including internet access and lets not forget Hello! Mcfly!, I got WIFI. Now if I could just figure out how to hack a Wifi SDcard with built in memory & add a bigger RAM chip.

by E | Dec 15, 2006 10:18:29 PM

ps i also put a focus wheel on my treo camera. E sings..."I can see clearly now the BS is gone... I can take macro shots when i want". ;)

by gonz | Jan 30, 2007 9:18:36 PM

I got "ERROR:Incomplete setup. please check your network settings (0x121A)".. Anybody can help me on this

by David M | Mar 18, 2007 3:03:57 AM

I wonder if I could use my palm TX as the access point for rev BT dun? anyone tried this?

by Jay | Mar 27, 2007 12:12:47 AM

Hi, I'm trying to access internet from my Treo 650 without service plan. I'm able to establish reverse BT DUN connection from my Treo to Macbook. I see connection 'established' both in Treo and Mac. However, when I try to access web site on Treo browser, it still asks me to turn on the phone (which I don't have any service for). When I turn the phone on obviously it complains about missing SIM card. Why does it need phone when it already has the connection? Any idea to bypass it?

by JISC | Jul 30, 2007 3:01:44 PM

those having 0x121A error, you have a problem with PC settings, either your LAN isnt shared, or shared already but may need to restart.

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by classifieds | Aug 17, 2011 7:01:22 AM

awesome nice post

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