Author Topic: slow transmission rate massender  (Read 1624 times)

Offline ghost1157

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slow transmission rate massender
« on: June 03, 2008, 11:59:17 AM »

 Mike,
 we have a customer complaining about slow transmission rates on massender for 1mb files , taking up to 2 minutes . The customer is testing similar products and the other products are delivering the file much faster.
 All products are using class 1 dongles and our dongle does have EDR but I am thinking we must not be using the EDR function ? We are using the MS API .

Any ideas as to why ? We will be testing internally today to identify what is going wrong....

We are contacting the dongle manufacturer as well.


Offline Mike Petrichenko

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Re: slow transmission rate massender
« Reply #1 on: June 03, 2008, 12:48:29 PM »
How may parallel connections were there?
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Offline ghost1157

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Re: slow transmission rate massender
« Reply #2 on: June 03, 2008, 01:13:34 PM »
 Possibly 4 connections in parallel ... more connections = reduced rate per channel ?

 he is testing competing units with a few phones but I think he is also testing with a single phone so there may be no parallel connections

Offline Mike Petrichenko

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Re: slow transmission rate massender
« Reply #3 on: June 03, 2008, 01:16:51 PM »
Possibly 4 connections in parallel ... more connections = reduced rate per channel ?

Correct.
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Offline ghost1157

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Re: slow transmission rate massender
« Reply #4 on: June 03, 2008, 01:20:08 PM »

 I would assume that this would be the same issue for all dongles / software ? Or do the linux drivers maintain the same transmission rates regardless of connections ?

 The issue I have is that competing units are performing much better in the same environment....

Does BTF take advantage of EDR when it is available?


Offline Mike Petrichenko

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Re: slow transmission rate massender
« Reply #5 on: June 03, 2008, 02:15:10 PM »
Upgrdae to WCL.

EDR depends on drivers, not on the library.

If you have one USB port and share it between 10 devices will perfomance be the same?
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Offline ghost1157

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Re: slow transmission rate massender
« Reply #6 on: June 03, 2008, 03:23:44 PM »


 So MS Generic Drivers don't use EDR ?

 I have been testing with a single connection (no parallel connections at all) and the best time I can get on 6 different phones (2 are PDA phones) is 25 seconds for a 823kb file . I also tried 4 differnet class 1 dongles and one class 2 dongle . Speed was the same across all of the dongles except the class 2 which showed all devices as ignored.  So while I am certain you are correct for multiple connections it will slow down, what about with one single connection?

At 25 seconds for 823kb that is a data rate of 33k per second, pretty darn slow, even without EDR the data rate should be much faster than that. 

 We do want to upgrade to WCL , however re-writing our software to take advantage of WCL costs money and I do not want to pay my programmers twice to re-write the software (once for the current version with single dongle and again when you release the developer with the multi dongle) so I have been patiently waiting for the developer version to be released.


Offline Mike Petrichenko

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Re: slow transmission rate massender
« Reply #7 on: June 03, 2008, 04:23:04 PM »
Hm. I have tested the MS drivers too and the speed was much better than on your side. I used BlueTake bt007i dongle.
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Offline ghost1157

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Re: slow transmission rate massender
« Reply #8 on: June 03, 2008, 07:50:05 PM »

 I tested with the following dongles :

Cirago 6210 Class 1
Air Cable Host XR Class 1
Linksys BT100 Class 1
Com One Class 2

Phones were
Treo 700w
Samsung SGH-820
Nokia 6133
Samsung SPH-M300