Alpha Technologies IPBELLv2-01 User Manual page 7


Intranet is PC network similiar to internet but it is „private". It is designed jsut
for small group of subscribers (for example workers in some company)

PoE (Power over Ethernet) is powering via data network cable.

NTP (Network Time Protocol) is protocol for synchronization of internal PC
clocks

NAT (Network address translation) is a method of remapping one IP
space into another by modifying
Protocol (IP)
traffic routing device

STUN (Session Traversal Utilities for NAT) is a standardized set of methods
and a network protocol to allow an end host to discover its public IP address if
it is located behind a NAT.

SIP User Agent - every SIP user agent (phone, software, device) identifies
itself with a string. The syntax of this string is not defined, but a common
practise is „device name + version"
User manual
IPBELLv2
-
datagram packet headers while they are in transit across a
network address information in
address
Internet
7