I have asterisk installed on a Pentium Celeron 366Mhz with a ISDN Modem using Isdn4Linux linking to a number of sip phones, no problem there. Only when i get a phone call coming from the isdn line (BRI) them in the beginning all is quite well, but after a while there come’s a delay from about 2 to 3 seconds (mainly outgoing)
Loads rais to about 0.70 to 0.80, mem is steady.
Does anybody have any idea how this comes? What can I do about it. Would an faster cpu solve this problem?
I tried to use two isdn-cards in one system and therefore I had to use isdn4linux-drivers to get it work. But I had to realize that i4l is not suiteable to use with asterisk. To avoid delays I switched to capi. But in my case only one isdn-card (avm) is possible.
If you only have one card in your system switch to capi. With the capi-driver you can phone over hours w/o any problems.
Your card has a HFC-Chipset, so you can use zaphfc (as included in bristuff) and fully wipe out capi or i4l. You can find it at junghanns.net. As long as you are not trying to connect to an Aclcatel PDX, you should have no problem with this.
indeed i have found zaphfc and installed it. It works, but with one anoying detail. It seems that i have some crc errors once every few seconds resulting in a crack in the sound (if you want to hear it for yourself call +3237667377)
i googled and posted on the user newslist a few times but notting usefull came up. The things that came up didn’t work with me.