Sites must have one or more senders to communicate. The sender itself does not provide connectivity to sites. Instead, it uses existing network connectivity to manage the connection, ensure the integrity of transferred data, recover from errors, and close the connection when it is no longer needed.
SMS supports the following connectivity systems:
RAS is provided with Windows NT Server. For information
about how to install and use Windows NT RAS, see your
Windows NT RAS product documentation.
Configuring Site Communications
Addresses Configuration Overview
Senders Configuration Overview