Registrar Stickiness - AudioCodes Mediant 4000 SBC User Manual

User's Manual
The figure below illustrates an incoming call using GIN:

18.1.3 Registrar Stickiness

You can enable the Registrar Stickiness feature per Account. Registrar Stickiness binds an
Account to one of the IP addresses (configured or DNS-resolved) in the Proxy Set
associated with the Serving IP Group. Once an Account registers successfully to one of the
IP addresses (i.e., SIP registrar server) in the Proxy Set, the device routes all subsequent
SIP requests (INVITEs, SUBSCRIBEs and REGISTER refreshes) of the Account to this
registrar. This applies until the registrar is unreachable or registration refresh fails, for
whatever reason.
To configure the Registrar Stickiness feature, use the following parameters in the Accounts
table:

Registrar Stickiness: Enables the feature.

Registrar Search Mode: Defines the method for choosing an IP address (registrar) in
the Proxy Set to which the Account initially registers and performs registration
refreshes. Once chosen, the Account is binded to this registrar.

Reg Event Package Subscription: Enables the device to subscribe to the registration
event package service (as defined in RFC 3680) with the registrar to which the
Account is registered and binded. The service allows the device to receive
notifications of the Accounts registration state change with the registrar.
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18. SIP Definitions
Mediant 4000 SBC