[asterisk-users] Stable clock with 2.6 and without Digium hardware.

[Anton Tinchev]

Anybody sucessfully got stable 1000Hz clock without Digium harware and kernel 2.6?
We need to consult some peoples how to clock asterisk stable with exactly 1000 Hz without much kernel/drives patching/tweaking.

Some test results we made so far:

2.6 with digium card - stable 1000 Hz.
2.6 with ztdummy - uses RTC and the clock is 1024, not 1000.
2.6 with some Realtime kernel patch - provides stable 1000 Hz for some time, but in moments stops/misses interrupts/goes away from 1000 Hz
2.6 with ztdummy USB_UHCI - don't works, needs some tweaking. Somebody knows good patch for it?
2.6 with ztdynamic as primary clock sources - some issues with 2.6 (ztdynamic not ported well to 2.6?) with the mainstream versions, somehow patches 
solves it.
2.6 with kernel clock - needs kernel recompiling and work stable with switched off kernel Preemption. Long time tests in progress now.

2.4 with digium card - stable 1000 Hz
2.4 with ztdummy UHCI - stable 1000 Hz
2.4 with ztdynamic clock source - stable 1000 Hz/Depends on network conditions.