Could an old Smart1 dialler be powered by DC instead of AC?

[dsk]

Hi
I have an old Smart1 Euroroute, Originally the power supply is AC 24V.
Whats happening if I connect it to the 24V DC supply for the PAX?

dsk

[twocvbloke]

Well, if the device was expecting AC and has it's own built-in AC to DC rectifier stage, then it would most likely just run fine, with the DC passing through half of the rectifier diodes, but it would probably drop the voltage by 1 or 2V...

Just don't try feeding a device AC power when it wants DC power, I've done that in the past, and the magic smoke that all electronics run on escaped from the devices in question....

[G-Man]

Not sure about Smart-1 EuroRoute controllers but U.S. Smart-1's utilize a dual power supply with nominal 33-volt (w/load- 24-volt?) and 12-volt outputs.

[twocvbloke]

I don't even know what a Smart1 is, I'm just basing the power side on my understanding of feeding DC to AC hardware and AC on DC hardware...

[G-Man]

I don't even know what a Smart1 is, I'm just basing the power side on my understanding of feeding DC to AC hardware and AC on DC hardware...

SMART-1 is the Mitel controller d_s_k is referring to. I don't know if the Euroroute version is different from the U.S. version.

[dsk]

Now, I have tested, it doesn't power up, and it is no leak of black smoke 

Its just to manage to put the black smoke back again from were it came, and everyting should work well 

On the other hand, the unit forgets the programming as soon as its no power, and it has no visible memory battery, so I am in some trouble.

I had a PC once were the battery was a part of the bios chip, it may be some of the same.

dsk

[dsk]

The postage kill my budget  but I got a SMART - 1 for less than $10 so its OK 
The US version this time called PAV+

Slightly different software, but no problem.

I guess I have I have everything needed to use my rotary PAX without using the Panasonic as a tone to pulse converter.

Mike Sandman http://www.sandman.com/ had (has?) one tone to pulse converter left.  Quite expensive, about $105 incl postage, that's about double price, and in addition the risk of having to pay 25% tax, and a fee for the taxation job.

dsk

[dsk]

This becomes actual again. The CMOS- battery seems to be in the chip, and not replaceable. With a powerout It forgets everything and I have to set it up again.

This is definitely out of my comfort zone.

dsk

[RB]

The Batt/chip combo, has it's limits.
I might suggest a small UPS with the power sup plugged into it for the backup.
If that's all that is on it, it should last quite a long time in a power outage.

[dsk]

They are obviously different versions. Opened another who lost memory, and yes! It was an old leaky battery. I had another old but not leaking Nicad battery of 2.4V and soldered it in. Time will show how long it will survive.

dsk