Quote: refer to 1st floor walk every step response:

The

Quote: refer to the original poster freedom_m response:

Baidu told me that the computer can connect 127 mobile phone, but my computer after the hub just connect the 42, then mobile phone is no reaction, in the other usb port also not line, also does not display the connection on the computer, a great god, and of all stripes help how to solve ah

This is related to computer motherboards

Well, I have a computer, has even before the 120 mobile phones, but when the sorting is pulled out, can only be inserted again when 80 mobile, this is what circumstance, to solve these problems, what method can solve it

To solve this to find a motherboard manufacturers, there's an expansion option

CodePudding user response:

USB protocol specification clear USB address only 128, so I can't connect more peripherals,

Equipment not reached upper limit, the estimate was caused by a lack of USB power supply capacity,
Without electricity, and, of course, can not identify peripherals, and mobile phones have electricity without power it doesn't matter

CodePudding user response:

reference 4 floor good02xaut response:

USB protocol specification clear USB address only 128, so cannot connect more peripherals,

Equipment not reached upper limit, the estimate was caused by a lack of USB power supply capacity,
Without electricity, and, of course, can not identify peripherals, and mobile phones have electricity without electricity ok

em... Don't understand, the situation is, there is a hub of even just a few devices, mobile phones are inserted again, there is no reaction, but if pulled the phone out of the other on the hub, the hub and other mobile phone can, this is not to limit it

CodePudding user response:

reference 4 floor good02xaut response:

USB protocol specification clear USB address only 128, so cannot connect more peripherals,

Equipment not reached upper limit, the estimate was caused by a lack of USB power supply capacity,
Without electricity, and, of course, can not identify peripherals, and mobile phones have electricity without electricity ok

Or, as the shortage of power supply capacity, how to solve...

CodePudding user response:

The Hub of power supply bai

CodePudding user response:

reference 5 floor freedom_m reply:

Quote: refer to 4th floor good02xaut response:

USB protocol specification clear USB address only 128, so I can't connect more peripherals,

Equipment not reached upper limit, the estimate was caused by a lack of USB power supply capacity,
Without electricity, and, of course, can not identify peripherals, and mobile phones have electricity without electricity ok

em... Don't understand, the situation is, there is a hub of even just a few devices, mobile phones are inserted again, there is no reaction, but if pulled the phone out of the other on the hub, the hub and other mobile phone can, this is not to limit it

Every equipment to provide the request to the HUB said he need to how much current, for example: your HUB can supply 500 ma, said a phone up to 50 ma, so even if there are 100 port HUB, with 10 mobile phones at full capacity, 11 phone up is useless,
Because the hub does not know you need to how much mA of current inserted into the device, if it is a keyboard, each keyboard only need 2 mA, 100 keyboard is absolutely no problem,

The hub of the power supply capacity is determined by the hardware, different brand is not the same,

CodePudding user response:

A penny a points goods, you use the hub must not high-grade hub
And hub upward to the motherboard, motherboard usb port class is low also not line,

You transfer hub, main board and no, motherboard in host may have the power and load is not enough,

Change a high-end computer, power supply enough (game that surely no problem), native of USB port enough (motherboard straight out that), a lot of motherboard eight,
Each hub received motherboard straight out of the usb, don't hub cascade, the problem would not have happened,

Important things three times: don't hub cascade!

CodePudding user response:

This is your operating system limitation