This is a read-create enumerated setting distinguishing whether a dial peer is a voice peer, used for voice calls on a voice gateway, or a data peer, used on gateways supporting universal or integrated ports for modem or data calls. An admin sets this at peer creation to tell the gateway what kind of traffic the peer is meant to carry, since the two types support different feature sets. For example, a gateway handling both fax-over-modem sessions and regular voice calls would need distinct peers, one set to data and another to voice.