Is XDA supports data transmission in HDSD standard? - Networking

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Do you mean HSCSD? :?:

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Poor Performance with XDA and XDA-II modem using GSM/CSD .

I have an application that sends encrypted voice over a GSM/CSD circuit.
When i use the XDA and XDA-II models, the delay between these two models is 2.2 seconds. The application delay is 0.5 seconds, then the delay in the CSD circuit (2.2 - 0.5) is 1.7 seconds. My problem is that the XDA and XDA-II performances are the worst when i compare it with other hardware solutions. I don't know if the modem driver have its job done by the StrongArm processor and this is slowing my application.
Have the XDA and XDA-II modems data compression algorithms? Can we disable the compression? I don't know where are the XDA and XDA-II AT commands manual
I need suggestions to improve my application for the XDA and XDA-II.
Thank you.
Cesar Bremer Pinheiro.
cesarbremer[REMOVE]@raseac.com.br

WIFI

Im looking at buying a wifi card for my XDA 2 ,
i have the CF backpack ,
i want to know which im better off with ,SD or CF - and which make ect.......
i have memory cards in both SD and CF so i dont have a prefrence which the wifi card is.
faster would be nicer.
our wifi network is both b and g compatable
thannk
ian
I use a Dell CF WiFi card in my XDA II.
For me CF is a better option because it allows me to keep my 512 mB SD in my XDA II all the time and I have some applications installed on it.
I prefer CF because the BackPack gives me that extra battery and WiFi certainly consumes more power. I don't want to use the BackPack all the time but for me it makes sense to use it (coz of extra battery) with WiFi.
Ed

Quick yes or no question....

Hi
Is it possible to use the 3G caperbility on my Exec so my laptop can connect to the internet through it? If yes, how?!
Thanks
HPJ
quick awnser
yes
http://forum.xda-developers.com/viewtopic.php?t=37298&highlight=modem
3G should be the same only difference is universal connecting differently
try the search before asking questions next time...
Yes.
As a rule of thumb, if it has 2 cameras it is 3G.
You can go to your carrier's website and search for the settings, Orange UK drop 3 lots of internet settings into the m5000 with the extended ROM:
Dial up WAP
WAP GPRS
Internet GPRS
The Universal will automatically pick one to use apparently but not having used this feature I don't know the situations where one would be preferable to another.
PReDiToR said:
Yes.
As a rule of thumb, if it has 2 cameras it is 3G.
Click to expand...
Click to collapse
Not entirely true. Advance TC M.A.G.I.C. (http://www.advancetc.com/) has 2 cams, and no 3G
raymondu999 said:
PReDiToR said:
Yes.
As a rule of thumb, if it has 2 cameras it is 3G.
Click to expand...
Click to collapse
Not entirely true. Advance TC M.A.G.I.C. (http://www.advancetc.com/) has 2 cams, and no 3G
Click to expand...
Click to collapse
Probably why he states "rule of thumb"..

Skype on mini!

Hello people,
Have anyone used Skype on mini? Mini doesn't have 3G and skype requires it i think. Have you tried? Which version did you download from?
Regards
Carty..
Skype does not require 3g. It works with wifi or BT. I don't have a wifi card but I've already played around with BT and is quitke good.
Hi,
Fine, let me try with gprs. Which version of skype is compatible with mini, can you please give me the link.
Thanx in advance.
Regards
Carty..
Skype
I tryed skipe with gprs and it works quite good! the quality is not the best but i cud understand my skipe contact... skype out was also quite good
Which version did you use? i couldn't find a version specific for mini. Only other devices like Dell, imate were there.
Thanx.
Regards
Carty..
I only tried it with their beta version. I uninstalled it because I don't have and don't want to buy a wifi card since soon I'll be replacing my S100.
i used the version for high speed cpus! you can download it from here:
http://www.skype.com/download/skype/mobile/download.html
I only tested it with gprs
Thanx you guys!
Regards
Carty..
www.CartyStudios.com
is it possible to run skype for ppc over a https proxy like the bigger brother for pc?
because i only have web and email on my ppc
Carty said:
Hello people,
Have anyone used Skype on mini? Mini doesn't have 3G and skype requires it i think. Have you tried? Which version did you download from?
Regards
Carty..
Click to expand...
Click to collapse
mast use wifi.
handyfanat said:
I tryed skipe with gprs and it works quite good! the quality is not the best but i cud understand my skipe contact... skype out was also quite good
Click to expand...
Click to collapse
Sorry to say that but that's bull****. Skype runs well via WiFi or 3G. GPRS only offers 56kbps, that is by far not enough bandiwth for voice. You can chat via GPRS, but no voice.
Private-Cowboy said:
handyfanat said:
I tryed skipe with gprs and it works quite good! the quality is not the best but i cud understand my skipe contact... skype out was also quite good
Click to expand...
Click to collapse
Sorry to say that but that's bull****. Skype runs well via WiFi or 3G. GPRS only offers 56kbps, that is by far not enough bandiwth for voice. You can chat via GPRS, but no voice.
Click to expand...
Click to collapse
That's true. Even If U'll switch to 4downling and 1 uplink U can barelly undestand your partner and with 1 uplink he will understand nothing. For skype U need at last 5 kB uplink and 5 kB downling - its impossible to get with GPRS.
You guys might need to get updated! Skype works well with my poor gprs connection even for voice! My gprs gives a transfer rate of an average 3kbps. The quality of the voice is like telephone clearity! I just used it for skype-out, a call to a land line number!
Regards
Carty..
@Carty: That's absolute bull****.
It doesn't even work smooth with bluetooth ~30kb/s.
Carty said:
You guys might need to get updated! Skype works well with my poor gprs connection even for voice! My gprs gives a transfer rate of an average 3kbps. The quality of the voice is like telephone clearity! I just used it for skype-out, a call to a land line number!
Regards
Carty..
Click to expand...
Click to collapse
Get real! Magician offers 2 GPRS modes: 3-2 and 4-1 (where 4-1 means that 4 of 5 slots avaiable are used for download and 1 slot for upload. For skype U need 5 kB uplink and 5 kB downlink and there's no way to get it with 4-1 where U have max 4kB downlink (u should barelly undestand UR partner) and 1kB (sic!) uplink (theres no way that U will be understood). 3kB down and 2kB up in 3-2 GPRS mode is pretty useless too...
Point is that Skype need much more bandwidth than standard VoIP software so U can try one of many other VoiP communicators and U may be succesfull.
^ Um, that isn't the correct way to gague your GPRS ability - 1 slot != 1kB. If you're getting only like 3-5kB, it's because of reception or operator restrictions, NOT slot limit:
http://en.wikipedia.org/wiki/General_Packet_Radio_Service for a general idea of the GPRS standard.
^ Um, that isn't the correct way to gague your GPRS ability - 1 slot != 1kB. If you're getting only like 3-5kB, it's because of reception or operator restrictions, NOT slot limit:
http://en.wikipedia.org/wiki/General_Packet_Radio_Service for a general idea of the GPRS standard.

Bluetooth Modem to Laptop HSDPA Speeds

I am supposedly in a UTMS/HSDPA zone (Detroit MI). The phone show me a "U" in the status bar. I've read the speed is around 1.5Mb/s. But I am getting only 30KB/s - 50KB/s MAX using the Hermes as a bluetooth modem! This sucks!
Is this speed limited by bluetooth? If I use the phone as a USB modem instead, does that increase the speed significantly? It's a much more involved setup to do this however.
Or am I missing something? These speeds are atrociuos for what I am paying. I expect MUCH MUCH higher speeds. Please someone enlighten me or I am going to cancel the stupid service.
Very frustrated. Thanks for any input.
Anyone?
I have the same problem via USB, here 60 miles north of Manila, Philippines. Best I can figure, it has to do with the radio stack being used...? I am using Orange m3100, but my buddies in Manila using Dopod 838 Pro and/or Universal, get real 3G speeds with no special settings...
What version of BT is on your laptop? Older versions than 2.0 are very slow. I use USB and get 700 Kbps avg with 2 bars of UMTS in Bay area, CA.
anubus12 - partly the answer gave you Chirunavvutho. Check what kind of BT adapter you have in your computer, which version.
Go to http://en.wikipedia.org/wiki/Bluetooth for details about versions and about speeds.
But, in my opinion and my practice BT option is much slower then USB connection. First of all all interference with other radios (especially WiFi [same bandwith], and other apliences like CRT monitors and TV, microwave ovens even fridge - it sounds weird but they do interfere.
Second - when your device has to be like a midleman, and has to use GSM/WCDMA radio to get information and then send it by BT radio it will limit it's speed. Actually both speed end efficency. That is why it is better to use USB.
Third - I do not know which version of HSDPA has Cingular in your area. Remember that even if they have 3.6 Mbps speeds may be much lower, due to many reasons - lot of users, kloged backbone etc.
Forth - for info on HSDPA go to: http://en.wikipedia.org/wiki/HSDPA
drummer10630 - find out FieldTest_157 here on xda-developers. It is monitoring application for Hermes. Find if you have HSDPA in your area. Remember that pure UMTS (WCDMA) has only 384 kbps. This app will tell you what kind of connection you have. You have here also manual if you do not know what to look for.
Hope this helps you guys
No EDR
The Hermes/TyTN supports Bluetooth 2.0 but not EDR. The maximum speed is 721 kbit/s, or about 90 kbyte/s.
abubasim said:
The Hermes/TyTN supports Bluetooth 2.0 but not EDR. The maximum speed is 721 kbit/s, or about 90 kbyte/s.
Click to expand...
Click to collapse
My buddy has a PCMCIA Card with EVDO Rev0. I put it the same computer and got constant DL rates at around 100Kb/s. That is very acceptable.
Using BT 2.0, it's horrible. I don't get anywhere close to 90Kb/sec.
So now, it might make more sense that USB would yield higher download rates. MAYBE.
Pawlisko said:
anubus12 - partly the answer gave you Chirunavvutho. Check what kind of BT adapter you have in your computer, which version.
Go to http://en.wikipedia.org/wiki/Bluetooth for details about versions and about speeds.
But, in my opinion and my practice BT option is much slower then USB connection. First of all all interference with other radios (especially WiFi [same bandwith], and other apliences like CRT monitors and TV, microwave ovens even fridge - it sounds weird but they do interfere.
Second - when your device has to be like a midleman, and has to use GSM/WCDMA radio to get information and then send it by BT radio it will limit it's speed. Actually both speed end efficency. That is why it is better to use USB.
Third - I do not know which version of HSDPA has Cingular in your area. Remember that even if they have 3.6 Mbps speeds may be much lower, due to many reasons - lot of users, kloged backbone etc.
Forth - for info on HSDPA go to: http://en.wikipedia.org/wiki/HSDPA
drummer10630 - find out FieldTest_157 here on xda-developers. It is monitoring application for Hermes. Find if you have HSDPA in your area. Remember that pure UMTS (WCDMA) has only 384 kbps. This app will tell you what kind of connection you have. You have here also manual if you do not know what to look for.
Hope this helps you guys
Click to expand...
Click to collapse
Thank you very much for the clarification. I'll check USB out to see if the x-fer rate is faster.
As to FiedlTest_157, I downloaded the manual and can't really make heads or tails of how to read it. The manual gives you some parameters, but how do I know what type of connection I have? UTMS/HSDPDA or EDGE?
anubus12 - let me tell you few things and then I will answer your questions. OK?
If you want to have fast data access for your PC - use PCMCIA cards or build in systems - IBM has few notebooks with it, other I do not care
I can assure you that it will be quicker then any connection via USB/BT because hardware and software (drivers and apps) are dedicated only to handle DUN (dial up networking).
So there is no point of comparing PCMCIA cards to PocketPC telephones. Especially when you are using two different networks.
I had HTC Apache in Sprint and Hermes in T-Mobile/Cingular and then I can tell you that Sprint network is simply faster then Cingular. First of all Sprint in my area is fully EVDO-Rev.0 and Cingular is UMTS sometimes HSDPA or EDGE depends on radio used, interference, or even air (windy/raining/t-storm - it has some influence).
HTC Hermes just like other PocketPC handles DUN well, but it is more like backup connection, not when you need it all the time. Just get the info and finish connection. Not because price per MB but they were not build to work this way. You need PCMCIA cards for that purpose (constant net access).
Most of people here might disagree but if you are not traveling internationally on regular basis - use Sprint or Verizon - it is faster and more reliable. Sorry guys its the truth.
When T-Mobile will start 3G it might be different thou T-Mobile has expirence in other countries but other networks has this advantage.
If you traver internationally then you have to use Cingular or T-Mobile. For corporate use I would choose Cingular for personal T-Mobile.
My point is that you cannot compare something which is not comperable. Back to your questions.
anubus12 said:
As to FiedlTest_157, I downloaded the manual and can't really make heads or tails of how to read it. The manual gives you some parameters, but how do I know what type of connection I have? UTMS/HSDPDA or EDGE?
Click to expand...
Click to collapse
OK, let me put it in the easy way
You have Cingular so your only choice is UMTS/HSDPA (3G) and EDGE (2G) because Cingular claims that it's network is fully EDGE enabled.
When on top screen bar you have G (or when using aku 3.3 - E) you are going to GSM (for basic data), AMR (for speach codecs), GPRS (for data connection).
When on top screen bar you have U (or when using aku 3.3 U or H) you are going to WCDMA (for basic data) or HSDPA CQI Status (for knowledge is HSDPA is in use). Well if you see H (aku 3.3) you know that you are in HSDPA area. But if you are using aku 2.3 you are going to HSDPA CQI Status.
You have to know that GSM/GPRS/EDGE data are time and usage driven due to it is TDMA network (Time Division Multiple Access). It means that network data are given to you every few seconds. Because data transfers it is usage then when you are finished data is 0 because nothing is happening. You have to monitor during transfer.
UMTS/HSDPA data are event driven due to it is CDMA network (Code Division Multiple Access). It means that you will see something during and after event. Like after download, but you have to have FieldTest open during download to record data. You are in HSDPA when after/during download in HDSPA CQI Status group CQI1-10 fields are more then 0.
Hope this helps, if you have more question just ask
I use both bluetooth and usb on the cingular network with my tytn.
And yes, bluetooth is much slower than usb regardless of the type of bluetooth on the pc.
I usually get 300-400 on bluetooth and 800-1300 on usb. higher speeds with vista vs xp (don't know why tho) I doubt you will ever get 1.5 mbs as you mention, unless you are the only person using that particular cell tower
@Pawlisko....My problem is that I do get 3G speeds when using the unit itself, browsing, streaming, etc..., but when I use it as a modem for my laptop, from the same location, during the same time frame, I only get one tenth the speeds. Are there different versions of the USBMDM.inf that would cause such a thing? I have experimented with init string settings, and for some reason, using NO init string gives me the fastest speeds.
eagle 1 said:
I usually get 300-400 on bluetooth and 800-1300 on usb. higher speeds with vista vs xp (don't know why tho) I doubt you will ever get 1.5 mbs as you mention, unless you are the only person using that particular cell tower
Click to expand...
Click to collapse
eagle 1 - By your end of quote I can tell you that still you are thinking old way
Huge advantage of CDMA is it's multi connection to tower bases. There is no handover like in TDMA system. In large city your cell might be served by many towers (TyTN 1 to 6).
HSDPA is regarding of category 0.9/1.2/1.8/3.6 Mbps (current). During 2007 CeBit in Hanover 7.3 Mbps will be shown. It will go thru 10.2 to 14.4 Mbps (max) in near future. Of course like any other link you have to substract overhead of TCP/IP protocol data of avg. 20%.
Like fast ethenet - suppose to be 100 Mbps = 12.5 MBps, if you will get 80 Mbps = 10 MBps of real transfer you have very fast network.
If you have more questions - ask
drummer10630 said:
@Pawlisko....My problem is that I do get 3G speeds when using the unit itself, browsing, streaming, etc..., but when I use it as a modem for my laptop, from the same location, during the same time frame, I only get one tenth the speeds. Are there different versions of the USBMDM.inf that would cause such a thing? I have experimented with init string settings, and for some reason, using NO init string gives me the fastest speeds.
Click to expand...
Click to collapse
drummer10630 - did you check your speed using any speed tester? Sometimes speed is relative. Remember that some pages are optimised for PDAs with less ads, better html coding etc.
First of all - do not change anything - no strings. Just put your APN in TyTN and dial *98# should be the fastest way.
Second - check if you have installed in your computer software like IM/update that will use some band without your knowledge. That can kill your connection for good.
And last - delete everything for comp - inf files, and related dlls. Install one more time and do not change anything. As plan as it can be.
As usualy - if you have more questions - ask
I can get about 70KB/s download with my laptop's built-in bluetooth module ( 2.0+edr) and tytn and about 150KB/s via usb ( i'm in Italy with VODAFONE operator ).
Using a 1.2 BT dongle on the pc will reduce speed at about 40KB/s ... this is the connection speed from the pc to the device and not from the device and the operator network ( network speed is independent from your pc to tytn connection ).
Just a question : how can be the tytn BT 2.0 without edr since the specs tell that only differences from 1.2 bt vers and 2.0 bt vers is only the speed increase and there isn't a 2.0 without edr in the bt specs ???
vdavide said:
I can get about 70KB/s download with my laptop's built-in bluetooth module ( 2.0+edr) and tytn and about 150KB/s via usb ( i'm in Italy with VODAFONE operator ).
Using a 1.2 BT dongle on the pc will reduce speed at about 40KB/s ... this is the connection speed from the pc to the device and not from the device and the operator network ( network speed is independent from your pc to tytn connection ).
Just a question : how can be the tytn BT 2.0 without edr since the specs tell that only differences from 1.2 bt vers and 2.0 bt vers is only the speed increase and there isn't a 2.0 without edr in the bt specs ???
Click to expand...
Click to collapse
OK, let me answer.
I do not know how abubasim knows that TyTN does not have EDR but this is meaningless.
Your speeds are normal. First of all maximum speed is something which normally is never achived. Why? Because of interference, not optimal power scheme etc. Just like WiFi (IEEE 802.11g) you will never get transfer of 54 Mbps = 6.75 MBps even with protocols overhead (of 20%) = 5.4 MBps. Real transfer is 1.5-2.5 MBps.
Now BT speeds:
BT 1.2 - 721 kbps = 90.125 kBps = real transfer max 72.1 kBps so your speed of 40 kBps is normal with this type. I would said that this is good link speed.
BT 2.0 - 3 Mbps = 384 kBps = real transfer max 307.2 kBps but as per wikipedia data transfer is 3xBT 1.2 = 2.11 Mbps = 270.375 kBps = real transfer max 216.3 kBps so your transfer of 70 kBps is roughly 1/3 so it is about right. I would say that 110 kBps is what you may get, if more you are lucky.
I do not know if TyTN has EDR - in my opinion it may have, but it has to be chcecked.
Hope this helps, if you have any other questions - ask
Pawlisko said:
First of all - do not change anything - no strings. Just put your APN in TyTN and dial *98# should be the fastest way.
Click to expand...
Click to collapse
You may have meant *99# ? ;-)
@Pawlisko :
i think the tytn has 2.0+EDR also if HTC website say 2.0 without edr ( this mean nothing if you read the BT specs ) .
I was using a samsung Z560 HSDPA before ( BT 1.2) and max download speed via BT in conjunction to my 2.0+edr laptop never reach up to 40KB/s.
Now with tytn i can reach up to 70KB/s and a stable 55KB/s , i mean tytn has real BT2.0+edr imho...
Menneisyys said:
You may have meant *99# ? ;-)
Click to expand...
Click to collapse
Right. My bad
Something that you may not have thought of. Set the baud rate on your Bluetooth serial ports to the highest rate at which you can communicate. Mine is set for 460Kbps. It made a serious difference for me. I didn't perform any measurements but I did see the difference. The default rate is 115200. This was the mistake that most folks made with standard modems. The default serial port rate was 9600 and a 56K modem needed to have data fed to it at at least 115200 to keep its compression engine busy. It didn't matter if you had a 56K data connection if you were only feeding it at 9600. The same principle seems to apply here, at least in my case.
Just my .02.
jblanken64 said:
Something that you may not have thought of. Set the baud rate on your Bluetooth serial ports to the highest rate at which you can communicate. Mine is set for 460Kbps. It made a serious difference for me. I didn't perform any measurements but I did see the difference. The default rate is 115200. This was the mistake that most folks made with standard modems. The default serial port rate was 9600 and a 56K modem needed to have data fed to it at at least 115200 to keep its compression engine busy. It didn't matter if you had a 56K data connection if you were only feeding it at 9600. The same principle seems to apply here, at least in my case.
Just my .02.
Click to expand...
Click to collapse
How do you set the modem to 460Kbps? The bluetooth modem is set as a standard modem at 115200, which is the MAX. I don't see an option for 460kps. Are you saying to set it up the BT connection as something other than a standard modem?

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