[schaefer: Re: [Asterisk-Users] ISDN debugging and SIP dial-in issue]

[asterisk-users at alphanet.ch]

On Sat, Nov 15, 2003 at 07:59:02PM +0100, Peer Oliver schmidt wrote:
> What is your reason to use i4l instead of the chan_capi driver
> (http://www.junghanns.net/asterisk/)? Did you try both, and found i4l
> perform better?

In short: bad reason (the ability to see the AT commands). I will
try CAPI ASAP.

The ttyI interface would be the UNIX way to access a device, using
simple AT commands and encapsulation and would make programs like
vgetty happy. Unfortunately, the ttyI layer in the kernel is full
of problems, especially when many communications are established
or shut down (locking issues).

> quality.

The quality is quite good. The problems are the delays. Even by cheating
and diminushing the ttyI <-> CAPI buffers at 172 bytes there are still
echo when my non asterix program does ttyI <-> ttyI call transfer/copying.