[Asterisk-Users] Digium cards, so disappointing !

[Rusty Dekema]

On 4/14/06, Rich Adamson <radamson at routers.com> wrote:
> I believe the TDM2400 has the capability of doing on-card fxo->fxs data
> flows (without hitting the pci bus), but that function has not yet been
> implemented. Its basically "required" to support faxes in an analog
> environment. When it is implemented, that card should work. The TDM400
> card will not work in 99% of the deployments.

I apologize if I'm being dense, but I don't understand why the fact
that a call traverses the PCI bus would kill a fax transmission. I
made the following setup, and it consistently gets 31200 and 33600
connects, no disconnects, good throughput:

Modem --- SIP ATA(G.711u) --- (LAN) --- Asterisk --- (TDM400FXS) --- Modem

I get the same thing (although alwyas 31200 connects, never 33600) with:

Modem --- (TDM400FXS) --- Asterisk --- (TDM400FXS_same_card) --- Modem

If this works, I don't see why a fax transmission wouldn't work. Is it
because the fax protocol doesn't have error correction? Is that even
true?

I realize that clearing up my confusion about this isn't probably
going to result in the problem being fixed, but I sure would like to
know...

-Rusty