Dec 19, 2018 — PortSIP Solutions, Inc., developer of the software-based Unified Communications Solution, announces the SP9 for PortSIP PBX 9.4.0 is ready! A Complete, Powerful, Unified Communications Solution for both on-premise deployment and cloud The SP9 fixed below bugs: The Music on Hold is not works correctly in the multi-tenant. Can't hold the call from [...]