Acme Packet (MOSC)

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SBC HA when using SIP/TCP

in Acme Packet (MOSC) 26 commentsAnswered

Assuming the standard deployment of a call server setting up calls between sip phones, the SBC separating the two:
- sip phones on one side of the SBC - access
- call server on the other side of the SBC - core.
SIP/UDP is used between the SBC and the call server.
As the sip phones are behind NAT, HNT is used.

When SIP/UDP is used between the phones and the SBC, in case of a SBC HA failover, the active calls are maintained and if one side disconnects the call, the call is properly disconnected on the remote side too.

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