An interesting VOIP-Intercom setup...

[twocvbloke]

Another Instructables thing I found, using a single Linksys VOIP box, you can create an intercom between two phones, and the box automatically calls the other phone!! Ain't technology great? 

http://www.instructables.com/id/Hack-a-VOIP-Box-Into-a-Telephone-Intercom/

I really want to try that now...

[Owain]

And no soldering ...

[dsk]

  I like this, and if you have a frequency ringer the ring frequency may be adjusted to the nearest Hz.

dsk

[twocvbloke]

An all round winner eh?

I've had a look on ebay, and the VOIP devices that article mentions are relatively cheap (compared to a dedicated and boring looking intercom set), especially with all the features available like ring cadence (handy for simulating party line calling), ringer frequency, connecting additional VOIP devices to add more phones, basically building up your own telephone exchange from hardware easily bought off the web... 

Though programming it all to work correctly, erm, don't ask me...

[dsk]

Yes it works!
I had to reprogram my pap2t, just to test.

Since the dial plan says S0 it calls rings the other one with no delay, changing to S2 gives you 2 seconds delay with a dial tone.

If we could let it accept a flash, as dial, we could dial 1 to each other 

I just don't know enough about dial plans.

dsk

[twocvbloke]

Cool, I want to try it now, but I just got the bill from the energy suppliers, so that's out the window now for the next couple of weeks...

Makes me wonder how far those things can be modified, maybe even to add pulse-dialling capability (I read on here somewhere that Linksys devices won't accept pulsing, but now, well, someone with knowledge about them things could possibly add that to it's firmware!!), oh the possibilities...

I find it funny that us Brits call "Flash" by a different name, which is "Recall", modern standards are of course a timed-break recall (aka, dialling 1 on a rotary or pulse phone), and older systems for older PBXs was an earth-loop recall, but it's the name "Recall" that makes me wonder, because you're not recalling something from memory, and you're not re-calling someone (which would be Redialling!!), but I guess the GPO just had to be different... 

[Owain]

....it's the name "Recall" that makes me wonder, because you're not recalling something from memory, and you're not re-calling someone (which would be Redialling!!), but I guess the GPO just had to be different... 

You're re-calling the operator into the conversation.

[dsk]

As far as I recall can remember. Te recall is to call inn or engage the register to accept dialing again.
This was traditionally made by grounding the line. Later the flash became a way to do it, but still its usually 150 millisec, so hook-flash is not a good idea.

dsk

[dsk]

  And when the setup is finished, the unit may work without network, just fooling it with a looback plug: http://tinyurl.com/8387ned

Still, I cant make it understand pulse dialing without a dialgizmo.  

dsk

Edit:
The picture tells about how to setup an oldfashioned dial tone and ringback tone:

[dv3894]

I have tried this and experimented with it, check my final result post:
http://www.classicrotaryphones.com/forum/index.php?topic=6845.msg78191#msg78191

and find it on my website directly by visiting
http://www.davesweb.wordpress.com/daves-diy-projects/
( dead link 02-03-22 )