Have you tried this?
It looks like you are trying to send pulses using microsecond sleep times. As far as I know, on the Raspberry Pi you can only get millisecond timing resolution.
There may be a way to accomplish what you want. It looks like it can be done using wiringpi. If you can control your remote stations via the command line on the Pi then it should be fairly easy to set up SIP to send those command line commands when a station needs to be turned on or off.
Dan
It looks like you are trying to send pulses using microsecond sleep times. As far as I know, on the Raspberry Pi you can only get millisecond timing resolution.
There may be a way to accomplish what you want. It looks like it can be done using wiringpi. If you can control your remote stations via the command line on the Pi then it should be fairly easy to set up SIP to send those command line commands when a station needs to be turned on or off.
Dan