sbc

Single-homed SBC In planning to migrate phone traffic from PRI to SIP, we decided to use an existing pair of session border controllers (SBCs) that were already in production for another (smaller) deployment. Before cutting over the whole organization’s voice traffic, I revisited the (3-year old) network design. While the two SBCs are in separate datacenters in separate buildings, each SBC is only single-homed. This means that there is SBC high-availability in terms of new calls, but existing calls will be dropped if there is a failure or maintenance on the switch....