Ability to specify a different subnet mask for the same network number on different subnets. VLSM can help optimize available address space. VMAC Virtual Media Access Control. When sending voice traffic over ATM, the voice traffic is encapsulated using a special AAL5 encapsulation for multiplexed voice. VoATM dial peer Dial peer connected via an ATM network.
VoATM peers point to specific VoATM devices.
VoFR Voice Over Frame Relay. When sending voice traffic over Frame Relay, the voice traffic is segmented and encapsulated for transit across the Frame Relay network using FRF.12 encapsulation. VoFR dial peer Dial peer connected via a Frame Relay network. VoFR peers point to specific VoFR devices. VoHDLC dial peer Dial peer connected via an HDLC network.