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
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