Accton Technology SIP Gateway VG3300 Series - Manual (Page 28)

VG3300
series user guide
"Realm" is a kind of verification for SIP Outbound Authentication. If SIP service provider does not
provides this information. The gateway will create a default Realm (by string
USER-UNSPECIFIED-REALM) automatically with your Username and Password mentioned on last
section for SIP Outbound Authentication. If there are more than one SIP entity is registered on this
gateway. The gateway creates Realm for each entity. The default Realm helps you to register the
SIP server successfully.
Configuration
WEB Page: ADVANCED \ SIP OUTBOUND AUTHENTICATION
10.5. Configure STUN
The STUN (Simple Traversal UDP through NAT) server is an implementation of the STUN protocol
that enables STUN functionality in SIP-based systems. The STUN server also includes a client API
to enable STUN functionality in SIP endpoints.
STUN is an application-layer protocol that can determine the public IP and nature of a NAT device
that sits between the STUN client and STUN server.
Notice: If your gateway is behind NAT (Use Private IP), must configure the parameter.
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