Restart PPP 3G modem script

Hi !

I have problem with my 3g usb modem, som time it just stops working, and then i have to disable the PPP interface, and then enable it to get it to work..
But i dont know how to disable / enable a ppp connection in a script ??

OS 5.6

Regards Christer / Sweden

/interface ppp-client set ppp disabled=no
/interface ppp-client set ppp disabled=yes

To enable/disable 3G modem, add script to /system scheduler or netwatch. However it is not correct behavior to disable/enable 3G modem to get it working.
Is it only one specific modem make problems like this?