[tomdkat]

So, I've got an Efficient Networks SpeedStream 5360 Ethernet ADSL modem I'm going to give someone who is setting up DSL service. The modem has a power rating of:

18VAC;0.8A50-60Hz

I don't have the power adapter that came with it BUT I have a power adapter that fits the plug on the DSL modem. When I connect the power adapter to the modem and plug it in, the modem powers up and appears to work just fine. The power rating on the adapter is:

INPUT: 120VAC 60Hz 30W
OUTPUT: 12VDC 1.2A

Can this power adapter adequately power the DSL modem or am I risking damaging the modem by using this power adapter?

Thanks!

Peace...

[JohnWill]

If the modem is expecting 18VAC and you're using 12VDC to power it, I'm somewhat surprised it works at all! I would say no to the adequately powering question.

[tomdkat]

Yeah, I was surprised as well. In fact, I connected it to a DSL Internet connection and was able to get online and everything!

I'll see if I can find an adequate power adapter.

Peace...

[tomdkat]

Is it maybe the AMPs that allows the adapter to work? I think the modem accepts 0.8A and the adapter outputs 1.2A.

Could this be it?

Peace...

[JohnWill]

Well, the difference between 18VAC and 12VDC is pretty significant!

I'm guessing that there is a rectifier at the connection that you happen to be the correct polarity to power the modem through the power connection.

I guess if it works it can't be all bad, but I don't know how comfortable I'd be with that arrangement.