KVH Industries TracPhone FB150 User Manual page 135

SIM Subscriber Identity Module.The SIM provides secure storing of the key
identifying a mobile phone service subscriber but also subscription
information, preferences and storage of text messages.
SIP Session Initiation Protocol. An application-layer control (signaling) protocol
for creating, modifying, and terminating sessions with one or more
participants. Used e.g. for Internet telephony.
SMS Short Messaging Service
U
UTC Coordinated Universal Time. The International Atomic Time (TAI) with leap
seconds added at irregular intervals to compensate for the Earth's slowing
rotation. Leap seconds are used to allow UTC to closely track UT1, which is
mean solar time at the Royal Observatory, Greenwich.
V
VPN Virtual Private Network. A network that is constructed by using public wires
to connect nodes. You can create networks using the Internet for transporting
data, using security mechanisms so that only authorized users can access the
network.
Glossary
126