[asterisk-users] DAHDI - better to have card?

[David Backeberg]

On Tue, Aug 18, 2009 at 12:20 PM, Kevin P. Fleming<kpfleming at digium.com> wrote:
> Boehm, Matthew wrote:
>
>> MeetMe requires an external timing source. Right now, using the dummy
>> driver. Is it possible to use the card solely for timing purposes? Any
>> benefit to doing so? Or should I just sell the cards?
>
> DAHDI 2.2.0 provides timing without using the dummy driver and without
> needing any cards. You can use a card for timing, but you'd need to hook
> up a crossover cable between two of the ports to get them out of red
> alarm status... but it's really not necessary any longer.

What are we to make of the output from dahdi_test? It comes out
perfect from a real card, and merely 'pretty good' from dahdi_dummy.

And also, what difference does it make if you have a lot of blinking
lights? Isn't a timing chip a timing chip?