Posted: Wed Oct 05, 2011 8:26 Post subject: POE WRT54GL
Hello there
I have read the tutorial on making WRT54GL poe, but I
wanted to know how can we get rid of the power adapter of the GL. Actually what i want to do is power the GL from the cable modem it is attached Is there any possibility to do this?
The cable modem is a motorola surfboard sb4200e and the internal power circuit has four DC out voltages of 1.8V, 3.3V, 5V and 30V.
Is there the possibility to use one of these outputs to inject power through the ethernet cable and power the GL?
Probably a bad idea. As I recall, the Linksys requires 12V and you don't have that. The 30V could be regulated down to 12V but then you still have one big problem. The modem PSU probably can not supply enough current for both the modem and the router.
well in the tutorial i have read that the gl works even on 5v and the current needed (as it says in the psu of the gl) is 1000mA. Actually i need to see how much current has the psu of the modem
Posted: Sun Oct 09, 2011 21:47 Post subject: Re: POE WRT54GL
patllakja wrote:
Hello there
I have read the tutorial on making WRT54GL poe, but I
wanted to know how can we get rid of the power adapter of the GL. Actually what i want to do is power the GL from the cable modem it is attached Is there any possibility to do this?
The cable modem is a motorola surfboard sb4200e and the internal power circuit has four DC out voltages of 1.8V, 3.3V, 5V and 30V.
Is there the possibility to use one of these outputs to inject power through the ethernet cable and power the GL?
This is extremely ill advised. Unless you know the wattage of the modems power supply (I mean the specific rail), the actual draw of the modem and the actual draw of the router you at best shorten the life of the modem power supply and at worst burn out the power supply of the modem in less then 5 minutes.
If you want to put the router a distance away from power you could try the D-Link DWL-P200 kit or some other combination of poe injector and poe splitter.
Posted: Tue Oct 25, 2011 23:43 Post subject: Re: POE WRT54GL
patllakja wrote:
Hello there
I have read the tutorial on making WRT54GL poe, but I
wanted to know how can we get rid of the power adapter of the GL. Actually what i want to do is power the GL from the cable modem it is attached Is there any possibility to do this?
The cable modem is a motorola surfboard sb4200e and the internal power circuit has four DC out voltages of 1.8V, 3.3V, 5V and 30V.
Is there the possibility to use one of these outputs to inject power through the ethernet cable and power the GL?
I have many WRT54GL's running with up to 60m Cat5e leads using an injector and extractor. Very cheap, using from 12v to 15v power supplies depending on lead distance.
