Signaling Port
Message Waiting Indication >Enable >Disable
NAT Keep-alive >Enable >Disable
P2P >Enable >Disable
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DTMF Signaling
Outband DTMF type
  RTP Payload Type
Signaling QoS
  Type of Service
  DiffServ Class
Signaling NAT Traversal
STUN Server
  Address
  Port
  User
  Password
>Encryption
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