[Asterisk-Users] Zaptel and ztdummy and timming question

[Brian]

Kristian Kielhofner wrote:
> Chris Samaritoni wrote:
> 
>> Do the Zaptel cards actually have a timer that it supplies to Asterisk
>> or is the phone company supplying the timer to the card that is then
>> passed to Asterisk?
>>
> 
> The high speed serial timers on the Zaptel cards provide the timing.
> 
> I don't know what zaprtc does, but I know that ztdummy uses the serial 
> timers on usb-uhci chipsets (another high speed serial device).
> 
> -- 

With kernel 2.6 ZtDummy works with out the need for a USB-UHCI chip.