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The Block Direction feature provides the ability to restrict the SBC Core from sending a SIP request (outside an existing dialog) from its own network to the opposite network, but does not restrict receiving a SIP request (outside an existing dialog) from the opposite network to its own network.

Additionally, the Block Direction feature can restrict the SBC from sending a SIP request or receiving a SIP request, or sending and receiving a SIP request from its own network to the opposite network.

When implementing a function that sends a test call, the network can send a test call to the opposite network even if blocking is enabled. The SBC allows all test calls even if blocking is enabled on trunk groups.

 

 

Command Syntax

 

% set addressContext <address context name> zone <zone name> sipTrunkGroup <SIPTG name> blockDirection <bothways | incoming | none | outgoing>

 

Command Parameter

Table : SIP Trunk Group Action Parameters

ParameterDescription

blockDirection

The Block Direction options include:

  • bothways – This trunk group blocks calls in both directions.
  • incoming – Calls inbound to this trunk group are blocked.
  • none (default) – No calls are blocked by this trunk group.
  • outgoing – Calls outbound from this trunk group are blocked.