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Bluetooth speed |
ATrubka
Joined: Sep 19, 2003
Posts: 6
PM |
Hi, guys.
Does somebody know what's the speed of the bluetooth port of T610 and Belkin USB-Bluetooth adapter F8T001v2?
I couldn't find any info about T610.
As for the adapter I found in its specification this:
Support for data rates up to 721Kbps
Data Rate: 723/56Kbps
Those 3 numbers are all different and it looks like a mess. Could somebody explain those numbers to me?
Could somebody also tell about T610's speed?
Thank you in advance. |
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wrath000
Joined: May 14, 2003
Posts: > 500
From: Norway
PM |
I don't know why those numbers are different, but BlueTooth speed according to specifications is 720kbit/s (uncompressed), which gives bandwidth of 90kb/sec
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ATrubka
Joined: Sep 19, 2003
Posts: 6
PM |
I've red bluetooth specifications from bluetooth.org.
I couldn't find any limitation such as 720kbps. So I assume it's up to a certain device.
So do you think in this case 723/56 means that the actual speed would be 56K? |
pzboyz
Joined: Sep 30, 2002
Posts: 133
PM |
It depends and is not a problem for most people.
For example, when my PC connects to my T610 is thinks the baud rate is 115kb/s. This may or may not be real for lots of reasons not worth mentioning here (only support for single slot packets!).
The GPRS speed is limited to approx 56kb/s, and so GPRS is the real limitation here. |
ATrubka
Joined: Sep 19, 2003
Posts: 6
PM |
As I understand 115kbps is GPRS connection rate and that's what you see on your computer when you connect to your phone as to a modem.
Rate for the bluetooth connection is unknown in this case.
I don't think GPRS is limited to 56, it's limited to 115 that's what I heard and that's what I get when connected. The actual speed though is much slower, even slower than 56 because of the reception and probably because of bluetooth.
So I'm trying to find what is the real bottleneck (BT or reception).
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wrath000
Joined: May 14, 2003
Posts: > 500
From: Norway
PM |
@ATrubka:
BlueTooth.1 speed is 720kbit/s no doubt about it
@all
GPRS top speed is 171.2 kbit/sec, but that would require the use of all 8 timeslots without error, which is not supported by any network. Top speed supported nowdays is 53.6 kbit/s
T610 can use 4 slots for receiving and 1 slot for transmitting which means it can recieve with the speed of 85.6kbit/s (~10.7kb/s) and transmit with the speed of 21.4kbit/s (~2.6kb/s)
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DarthBart
Joined: Aug 11, 2003
Posts: 24
From: Singapore
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BT operates in two modes, Asynchronous Connection Less mode (ACL) and Synchronous Connection Oriented mode (SCO)
In ACL mode, the speed is 721kbps downstream and 57.6kbps upstream (ideal condition) and in SCO mode, the speed is 432.6kbps in both direction (ideal condition)
What the Data Rate means is 723kbps one direction and 56kbps in the other (ACL mode)
[ This Message was edited by: DarthBart on 2003-09-20 06:56 ] |
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Posted: 2003-09-19 16:27
