Thinkpads Forum

Hi all,

I am in search for a "Wake on Ring" possibility for the IB; Thinkpads (in my case, R31 & T42).

I know that this "option" in principal worked with some PC's (maybe a bit before the Internet cam to full hype).

I would like to use a TP as a fallback system in a case where I cannot access one of my networks via Internet anymore (i.e. if the dyndns does not work etc.)

Then, I want to ring the phone and it should start up, doing some service routines.

All works pretty nice with WOL, but I want to make it happen with WOR as well.

Any Ideas?

Thanks in advance
jwege

WOL doesn't carry any significant voltage.

A ringing dialtone is -48V or better on a loop-start line.

I see a problem right there, although I can't say I've tried it, but would tend to believe that if you were to actually send the aforementioned ringing voltage up to the laptop's modem, it wouldn't like it...

My $0.02 only...

Thanks for your opinion.

I guess it has noting to do with voltage or so but rather if the bios / machine has built in ANYTHING at all that is monitored (like the NIC is) and that may wake the TP up.

From a standpoint of TP is a portable device and earlier years, it was more likely to be reached by phone than LAN/Internet, could be tha case.

On can also argue: For what the hell needed? If somene with a TP wants connection, he will ring the provider ... also true.

So, the question stays (and can supposedly only be answered by real cracks).

Thansk again
jwka

ajkula66 wrote:but would tend to believe that if you were to actually send the aforementioned ringing voltage up to the laptop's modem, it wouldn't like it...

A PSTN modem that couldn't tolerate ring voltage would be effectively useless, so any modem for conenction to the PSTN, including the ones built into ThinkPads, must be able to withstand ring voltage to pass regulatory compliance!

jwege wrote:and can supposedly only be answered by real cracks

Basically, its not possible. There is no separate power control on the modem in any laptop that I have ever come across, and without the ability to keep the modem powered while the rest of the system is powered down, you don't have a starting point for a wake-on-ring capabiity.

You might be able to cobble together something for your purpose if you use an external PSTN modem that you keep constantly powered, then sense the RI (Ring Indicator) signal line on the RS-232-C interface with something (a microcontroller, or whatever), and use that to wake up the Laptop via a WOL packet etc etc.

The RI signal line was originally used to enable software running on a device to command a manual connect modem to answer a call, in the distant days before auto-answer capability in modems. It's pretty much redundant for most purposes nowadays, but it still exists.

Cheers,

Bill B.

That's what I feared ...

So, I need to harware-change my Notebook to make the power button pressed if it rings.

Thanks anyhow!
Juergen

bill bolton wrote:Basically, its not possible.

Browsing around in my X41T BIOS, I came across the following:

Resume on Modem Ring [Disabled] is default, Enabled is an option. Enable/Disable the system to resume when the modem detects an incoming call.

Ref: http://support.lenovo.com/en_GB/researc ... MIGR-61874

It seems to be possible after all.