[Asterisk-Users] isdn4linux delay

[Rene Kluwen]

I have a weird problem and I cannot put my finger on it.
I hope somebody can help me out.

Incoming and outgoing calls via the internet go perfectly well.

Calls that originate from a SIP or AIX client on the local LAN (100 Mbx) 
and terminate via a Winbond BRI often (not all of the times, but most of 
the times) are having a (about) 5 second delay starting from when I say 
something until the other end hears what I said.

Everything seems to go okay at the start of a conversation. But the 
problem seems to get worse when the call lasts longer (only after a few 
minutes already, really).

To make the problem more fuzzy: I have a user that dials in from the 
internet and then connects to an outside line via ISDN and according to 
their claims, the problem occurs less frequently (only every so many calls).

Is this a known problem with isdn4linux? Does the Linux capi driver 
support ISDN cards utilizing Winbond chips? Or do you guys think that 
changing to capi would not help me in this matter?

Thanks in advance,

Rene Kluwen
Chimit