USB Modem Power Issues / USB Extensions

Another thing, my port settings for the Hauwei are
Bits per second: 9600
Data bits: 8
Parity: none
Stop bits: 1
Flow control: None

That doesn't all seem right to me. I would have put the flow control on Hardware and the 9600 seems slow. Dunno ...
 
By the way, a while back already I unchecked Allow the computer to turn off this device to save power, thinking it bombed because of this when I switched to battery consumption.
 
OK, I just found it: On the Generic USB Hub Properties thingamabob it says the hub is self-powered and the total power available is 500mA per port. There is nothing on the box documentation about what is required.
 
Sounds like you have your connection running via NDIS
For the hell of it try running it off the other "RAS" option & see if its any differant.
On the dash, while your disconnected - Settings/Options/ check the RAS(modem) button.
Might rule out windows doing something wrong to your connection if it proves any differant.

Not sure where your getting that 9600 figure from but for me Control panel/Modem/Properties/Modem the default "Max Port speed" setting is 460800
9600 we use that as dial up speed on old sat phones!
 
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That's what I thought. 9600 reminded me of the dial-up days, but what perplexed me was that despite that setting I was getting speeds up to 3Mbps when the going was good so I wondered what difference that setting made.

Will try RAS. Thanks.
 
I am also having problem with my E1820 from 1st Jan. Some times it works 100% with out any problems. And sometimes it dies every minute. I dont think it is the problem with power because i am using the USB from the time i bought it.
I have downloaded MDMA to check if i can find something. RSSI is ranging between 93 to 99 dBm according to the MDMA.
Is this the problem or can there be another problem. I also noticed that the cell id is also changing between 16213 or 16203. But this not changed very frequently. Changes once or twice in half hour.
Please advice if anything else needs to be moniterd.
If RSSI is the problem then what will be the solution?
 
E1820 USB related problems [solved]

Here's my dilemma...

I have a desktop pc with a gigabyte motherboard (LGA775), 450Watt gigabyte PSU, etc. The motherboard has about 10 USB ports (6 at the back and 4 additional via expansions on the board).

I've recently upgraded from Vodacom to Cell C and now I'm having USB problems. The E1820 works fine (besides the odd disconnect here and there), signal and speed is great. Problem is that with the E1820 connected any other highish powered USB devices (such as external HDD's) automatically malfunction (as per Windows XP error) when connected. After this happens even flash drives don't work. The problem however does not occur when I disconnect the modem or use my Vodacom E169.

The E1820 is connected via the back USB and I've tried various port configurations. Now I can probably buy a powered USB hub but I honestly can't see why this would be required.

Any ideas?
 
Tried seeing if its any different if you unplug the USB expansion board?
Sounds like not enough power available - E1820 seems to be demanding - on my laptop the card reader won't even work properly with the modem running.
Similar issues sometimes with external HDD's
 
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Tun@ said:
Tried seeing if its any different if you unplug the USB expansion board?
Sounds like not enough power available - E1820 seems to be demanding - on my laptop the card reader won't even work properly with the modem running.
Similar issues sometimes with external HDD's
Click to expand...

Interesting. Well the expansion ports are simply connectors plugging into the motherboard but I've anyway tested everything via the back USB only and the problem still persists.

I just can't understand how there could not be enough power available. I wonder if other folks are experiencing the similar problems.
 
On my desktop my E1820 had detection problems when anything else was plugged in to any of the USB ports. On a friend of mine's laptop his white speedstick doesn't detect, unless he uses the docking station. It works fine on his desktop.
 
Turbo_Aspiration said:
Anyone tried using a one of those y usb cables? The ones with the extra connector for power.
Click to expand...

That going to be tricky since unlike the E220 the usb port is integrated on the modem unless you can find some male/female y cable.

According to device manager the unit requires the max 500mA that USB ports provide but I can't seem to understand why it's conflicting with other USB devices since every port has it's own 500mA reserved power.
 
Problem resolved

I've managed to resolve the problem. I forgot to mention that I had a standard USB extension cable connected to the modem. The cable however is only 30cm but was the cause of the problem.

I found this quite interesting and retested with 2 other extension cables (different lengths and brands) only to experience the same problem. The extension cables however works fine with my flash drive, external HDD, cellphone although none of these devices require full 500mA power and range between 90mA and 278mA.

It's pretty safe to assume that if I had another 500mA device to test with, I would have experienced the same problem. The cable someone affects the rest of the computers USB ports when a 500mA device is connected. Why? I'm not sure.

I'm going to purchase a powered USB hub sometime soon to see how it affects the above outcome.
 
DarKWateR said:
I forgot to mention that I had a standard USB extension cable connected to the modem.
Click to expand...
Is there such a thing? :p

Some work, some don't, and those that work probably won't work when you have a bad signal either.
 
DarKWateR said:
I'm not following, what do you mean some work some don't and what does this have to do with the signal?
Click to expand...
Yes, some work and others don't. IIRC, the USB standard does not actually allow for extensions, so they are all non-standard.
The connectors going from your motherboard to your front USB connectors are technically USB extensions.
The extension cable that came free with your flash drive might work fine with your low-powered flash drive, but not with your high-powered modem or hard-drive.

The worse your signal is, the harder the modem has to work to get itself "heard" by the tower, the more power it uses and the more heat it generates.
So a USB extension cable that works fine in ideal signal conditions may not work when the signal is poor and modem is using maximum power.
 
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ginggs said:
So a USB extension cable that works fine in ideal signal conditions may not work when the signal is poor and modem is using maximum power.
Click to expand...

Ok. Well I have extremely good signal and still a USB extension cables causes problems on the other USB ports. At this stage I firmly believe the E1820 modems simply do not want to be on any USB cable whatsoever irrespective of signal.
 
DarKWateR said:
Ok. Well I have extremely good signal and still a USB extension cables causes problems on the other USB ports. At this stage I firmly believe the E1820 modems simply do not want to be on any USB cable whatsoever irrespective of signal.
Click to expand...

Mine is attached to a 3M cable without problems. As ginggs says not all cables are created equal. :)
 
morkhans said:
Mine is attached to a 3M cable without problems. As ginggs says not all cables are created equal. :)
Click to expand...

I find that extremely strange since I've tested many cables. Look, the modem works fine on the cable, it's just the other USB ports that becomes a problem with other 500mA devices. I'll try and locate some more cables for testing.
 
DarKWateR said:
I find that extremely strange since I've tested many cables. Look, the modem works fine on the cable, it's just the other USB ports that becomes a problem with other 500mA devices. I'll try and locate some more cables for testing.
Click to expand...

I only have the 3G modem attached via USB. But I suppose it is possible the power draw from additional devices could cause instability.
 
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