hi list.
after my unsuccessfull experiences with mISDN i tried again to implement a zaphfc based solution.
problem is: sound on calls via capi is stuttering/broken and therefore unuseable.
my conf:
- cel 1300, 256mb ram
- avm b1 via capi connected to my outgoing ISDN
- acer surf pci via zaphafc and crosslink cable with termination as internal bus
- siemens gigaset 3035 as internal phone
- various sip-phones on my pc to test
software versions: - gentoo with kernel 2.6.9 - bri-stuff.0.1.0-RC4a installed with cvs -z9 co -D '2004/08/21 21:34:58' asterisk libpri zaptel
all worked fine and this was the first time i could get the gigaset to talk to asterisk (in contrast to mISDN).
but ... the sound problem:
ive got stuttering noises, voice is almost not understandable in some cases - but in every case ;-(
symptoms: - calls form gigaset to asterisk (demo,menu etc) are ok - calls from gigaset via asterisk to pstn have stuttering - calls from sip via asterisk to pstn are ok - calls from pstn to asterisk (demo, menu etc) have stuttering - calls from pstn via asterisk to gigaset have stuttering - calls from pstn via asterisk to sip are ok
what me stikes here is that you cant find a definitive suspect here.
zaphfc itself seems to be ok - demo and menu sound are ok and otoh i get problems when zaphfc is out of the game - like calling asterisk alone from pstn.
but capi itself works - at least when i use sip to call out.
ive got to stop scratching my head about this before i loose to much hair ...
i googled around and found no solution. what i tried:
- the hdparm thing
- switching apci/acpi
- changing resitors for termination of the internal bus (100/50 ohms) or remove termination completely
one thing that makes me curious are interrupts:
Sat Nov 20 13:49:30 CET 2004
CPU0
0: 4270237 XT-PIC timer
1: 44 XT-PIC i8042
2: 0 XT-PIC cascade
5: 32813694 XT-PIC zaphfc
8: 2 XT-PIC rtc
10: 16843 XT-PIC b1pci-b000
11: 16563 XT-PIC uhci_hcd, uhci_hcd, CMI8738, eth0
14: 1822 XT-PIC ide0
15: 17 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0
Sat Nov 20 13:49:40 CET 2004
CPU0
0: 4280248 XT-PIC timer
1: 44 XT-PIC i8042
2: 0 XT-PIC cascade
5: 32893770 XT-PIC zaphfc
8: 2 XT-PIC rtc
10: 16844 XT-PIC b1pci-b000
11: 16569 XT-PIC uhci_hcd, uhci_hcd, CMI8738, eth0
14: 1822 XT-PIC ide0
15: 17 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0
there was no activity on the system and zaphfc produces interrupts like crazy. i found one post describing the same thing - but the thread concludes without solution ...
someone got ideas ?
or maybe i could try another approach:
has anyone got a similar working configuration (isdn external & internal via capi and/or zaphfc and/or mISDN) ?
which hardware / software do it run on ?
wbr.tja...
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