This is a read-create enumerated setting that specifies which voice-related encapsulation type, such as voice, voip, voatm, or vofr, a dial peer uses on its associated network. An admin sets this when creating a peer to declare whether it's a telephony-side voice peer or one of the various network-encapsulated peer types like VoIP, VoATM, or VoFR. For example, creating a peer for a branch office reachable over Frame Relay would set this object to vofr so the gateway encapsulates voice traffic correctly for that link.