Virgin Mobile MIFI 2200 User Manual

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SIM — Subscriber Identification Module. Found in GSM network technology, the SIM is a card 
containing identification information for the subscriber and their account. The SIM card can be moved 
to different devices.
 
SMS — Short Message Service. A service for sending short messages of up to 160 (224 in 5-bit mode) 
characters to mobile devices. SMS is also known as text messaging.
 
SMTP — Simple Mail Transfer Protocol. An Internet standard for email transmission across IP networks.
 
SSID — Service Set IDentifier. The name assigned to a Wi-Fi network.
 
TCP — Transmission Control Protocol. A core protocol for transmitting and receiving information over 
the Internet.
 
TCP/IP — Transmission Control Protocol/Internet Protocol.  The set of communications protocols used 
for the Internet and other similar networks.
 
Telnet — Telecommunication Network. A network protocol used on the Internet or on local area 
networks.
 
TFTP — Trivial File Transfer Protocol. A file transfer protocol with a subset of FTP functionality.
 
UA — User Agent. Any device or software used to access a web page. A user agent might be a web 
browser, a smart phone, or a screen reader.
 
UDP — User Datagram Protocol. A simple transport protocol used to transfer information on the 
Internet.
 
UI  — User Interface. The part of a software application or hardware device that a user sees and 
interacts with.
 
UMTS — Universal Mobile Telecommunications Service. A third-generation broadband, packet-based 
transmission of text, digitized voice, video and multimedia at data rates up to 2 Mbps. UMTS offers 
a consistent set of services to mobile users all over the world. UMTS is based on the GSM standard. 
Until UMTS is fully implemented, users can use multi-mode devices that switch to currently available 
technology.
 
USB — Universal Serial Bus. A connection type for computing device peripherals such as a printer, 
mobile modem, etc. USB connectors may be used for data transfer or charging.
 
USB Port Types — The USB ports on computers and hubs have a rectangular Type A socket, and 
peripheral devices have a cable with a Type A plug. Peripherals that do not have an attached cable 
have a square Type B socket on the device and a separate cable with a Type A and Type B plug. Ports 
and connectors are available in different sizes (for example, standard, mini, and micro).
 
USSD — Unstructured Supplementary Service Data. A service found in HSPA/GSM networks that 
allows the user to retrieve information or implement certain types of call services.
 
VNC — Virtual Network Computing. A graphical desktop sharing system that uses the RFB protocol to 
remotely control another computer. 
 
VPN — Virtual Private Network. A secure private network that runs over the public Internet. Commonly 
used to connect to an office network from elsewhere.
 
VPN Passthrough — A feature that allows a client to connect to a VPN server.