Nextel iR1200 Installation Manual page 41

iR1200 Modem
network, users register their presence with the foreign agent, and the home agent
forwards the packets to the remote network. Mobile IP permits mobile devices to inform
a "visited" network that it is present and then arrange to have its home network froward
data to it automatically.
Modem
An electronic device enabling digital data to be sent over analog transmission facilities.
Converts a digital signal to analog and back to digital again. Modem stands for
Modulator/De-Modulator.
Non-Routable IP
A communications protocol that contains only a device address and not a network
address. It does not incorporate an addressing scheme for sending data from one network
to another. Examples of non-routable protocols are NetBIOS and DEC's LAT protocols.
Also some TCP'IP addresses are considered non-routable.
Non-Volatile Memory
Memory that holds its content without power. Permanently stored information. It is not
lost when you power off. ROMs, PROMs, EPROMs and flash memory are examples.
Packet Data
A bundle or block of data, organized in a specific way for transmission.
Parallel Port
A low speed port, usually located on the rear of a computer which usually connections to
printers. Parallel ports transmit data simultaneously over eight "parallel wires" one byte
at a time (as opposed to a serial port, which transmits data one bit at a time).
Parity Bit
Parity is a process for detecting whether bits of data have been altered during
transmission. A Parity Bit is a non-data bit that is added to a group of data bits to check
for transmission errors. Parity Bits are used in Parity checking which is an error-checking
method in asynchronous transmission. The parity bit tells the receiving end of a
transmission whether there should be an even or odd number of bits contained in that
transmission.
PIN
Personal Identification Number.
PING
(Packet INternet Grouper) An Internet utility used to determine whether a particular IP
address is online. It is used to test and debug a network by sending out a packet and
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