[Asterisk-Users] Any 24 (or 30) way FXS PCI cards?

[Shane Young]

Quoting Rich Adamson <radamson at routers.com>:

> > > > > It seems to me silly to have a T1/E1 card to connect to a channel bank
> > > > > when you could just have a 24/30 way FXS card in the slot in the first
> > > > > place.
> > > > > 
> > > > > Does such a thing exist?
> > > > > 
> > > > > Wouldn't Digium have a lot of customers if they could produce one for
> > > > > say < $1000 retail?
> > > > 
> > > > Trouble is power. Unless there is more power made available, you may not
> > > > be able to drive the ring voltage of several consecutive lines at once. 
> > > > 
> > > > Take for instance the Adit 600, it has a 130w power supply for just 25
> > > > ren capability. Think of the troubles that would cause trying to be
> > > > regulated through your standard PC PSU of 300w. Won't you just love
> > > > trying to diagnose random reboots right after a phone call comes in and
> > > > over draws your PSU capacity and it goes into short protection where it
> > > > begins pulsing power.

The InterTel Axxess had a good solution to this.  Each station card had it's own ringing generator 
which produced ringing voltage at about 70 volts.  It worked for most things but we had problems 
with a few modems and double-gong ringers.  If you needed more, you would move a jumper on the 
card which would disable the internal generator.  Then, you would provide 90/20 on the 25th pair 
of the AMP connector.  

In my mind, I imagine something very similar.  It would look like an old SCSI card from the back 
of the PC with the big 25 pair connector.  Pairs 1-24 would be the station lines and pair 25 would 
be for the external ring generator.

--Shane