I recently had the opportunity to give a short series of shiurim on distance based Mitzvah fulfillment. Here are those three session for those who might be interested.

The first session dealt with some of the theological or spiritual implications of the debate between Rav and R. Yehoshua b. Levi in Pesachim 85b. Here in a link to the source sheet. You can also listen to the audio here. The second session was an analysis of the Halakhic implications of this very same debate. Here is a link to the source sheet and you can find the audio here. The third and final session looked at three different approaches to the telephone – beginning with the very first teshuva about the telephone, moving to Rav Shlomo Zalman Auerbach and concluding with Rav Moshe Feinstein. Here in a link to the source sheet and you can find the audio here.