If you want to send all of the Distributions in a Channel outside of Channel's the normal Send schedule, you can manually force the distribution process.
Assuming a new Distribution has been built and the Channel's Send schedule is not ready to fire, do one of the following to force a Channel to be sent:
1. Click the Channel object > click Properties > click the Schedule tab > select Run Immediately > click OK > right-click the Distributor object > click Refresh Distributor.
2. After the Distribution has been sent, click the Channel object > click Properties > click the Schedule tab > select the schedule that the Channel previous had > click OK.
As soon as a Subscriber receives an entire Distribution, it will extract it according to the Subscriber's Extract schedule.