On 6/8/2013 8:10 PM, Mitch Kelly wrote:
Hi,
The 703N can only supply 200mA out the USB port, Its likely this issue
is caused by the device using more power that can be supplied and the
device resetting.
TP-Link have a compatibility Martix for devices, It is based on Power
consumption, Not just drivers in stock firmware.
Mitch Kelly.
I and others run an OpenWRT based project that expands the USB modem
capabilities of the firmware to include automatic connection, full LTE
speeds for 4G modems and other modem related features.
We have come across this problem of disconnection shortly after
connecting many times and it always has come down to lack of power being
supplied to the modem. With over 7000 downloads of our firmware we have
much experience in this area.
The WR703N can supply, if available, up to 1.25 amps to the USB port
according to the specs of the switch chip that they use. The stock power
supply that comes with the WR703N is rated at 1 amp by the sticker but
we have found this is not always the case.
By using a better, higher rated power supply you'll see the problem
disappear. Modems take much more power than you would think and a poor
signal can add to the drain. An LTE modem in a low signal area can use
up to 800ma, which is far more than the stock power supply can provide.
The issue of disconnections is seldom caused by the router firmware but
seems to be power supply based in almost every case.
Ralph Deane
http://www.ofmodemsandmen.com
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