Added SPP (Single Port Protocol) support in 4.04 / 6.04 firmware.

The firmware can be downloaded from our Web site at:

SPP requires the registrar voip to have a static IP, but the client voips can have dynamic IP addressed connecting them to the internet. The client voip itself will have a static IP, but the cable or DSL router can have a dynamic internet IP address.

SPP is not compatible with our proprietary firmware which runs on our mvp110, 120, 200, 400 or
800 voips.