I've spoken with my own father confessor about this issue. What I took away from that was that a penitent may seek counsel from his confessor over the phone/email/Skype, but that this is not in itself a full sacramental confession. It has to be completed either by the penitent and the father confessor meeting in person at a later time and doing the absolution prayer then, or the penitent going to a local priest for that.
It should be noted that confessors are usually, but not always, clergy. In the case where a layperson (usually a monk or a nun) is blessed to hear confession, the penitent still goes to a priest for the absolution prayer.