End user options for protecting VoIP adapters and routers / modems is often limited to only the security features that the VoIP vendor supplies or updates in their product. Despite this, it is possible to select a VoIP product which has good VoIP security built in. For these devices, it is recommended that the phone utilises SIP and SRTP protocols (most vendors will state if their softphone supports these, or can be asked for such information). Both these protocols (if well implemented by the vendor) will boost the security of the VoIP service significantly.