
TOPEX MobiLink
IP
Preliminary Manual
MAC
Address (Media Access Control) - A MAC address is the hardware (physical) address of a
device connected to a network.
All network interface controllers must have a hard-coded and unique MAC address. The MAC address
is applied at the factory and uniquely identifies network hardware, such as an Ethernet cards, modems
or wireless adaptors on a LAN or WAN. The first part of the address is unique to the company that
produced the device, and beyond that it is a sequence of digits unique to a single device manufactured
by a company. MobiLink IP features a single Ethernet port, so it will have one MAC.
SNTP -
Acronym for
S
imple
N
etwork
T
ime
P
rotocol. Simplified version of NTP, Internet standard
protocol used to update the real-time clock in a computer. It assures accurate synchronization to the
millisecond of computer clock times in a network of computers. NTP is very useful in packet-switched,
variable-latency data networks. In case of MobiLinkIP, if you want to measure the performances of the
network, you need accurate, universal time-stamps for the data packets.
NTP runs as a continuous background client program on a computer and it sends periodic time
requests to servers, obtaining server time stamps and using them to adjust the client's clock. NTP
uses UDP port 123 as its transport layer. It is designed particularly to resist the effects of variable
latency. There are numerous primary and secondary servers in the Internet that are synchronized to
the Coordinated Universal Time (UTC) via radio, satellite or modem. For more information, visit
Routing
-The process of determining and prescribing the path or method to be used for establishing
connections and forwarding data packets. In a network, a 'routing switch' is a device that combines the
functions of a switch, which forwards data by looking at a physical device address, and a router, which
forwards packets by locating a next hop address. Each host with a router in the network uses the
routing table information to determine the next host to route a packet to for a specified destination.
S-HTTP
- Acronym for SECURE HYPERTEXT TRANSFER PROTOCOL. A secure way of
transferring information over the Web, by using an application-level encryption scheme. S-HTTP is an
extension of the normal HTTP with security enhancements for WWW-based commerce. Web pages
that use S-HTTP have a URL starting with https://. Typically HTTP data is sent over TCP/IP port 80,
but HTTPS data is sent over port 443. The standard was developed for secure transactions, and uses
40-bit encryption ("weak" encryption) or 128-bit ("strong" encryption).
The HTTPS standard supports certificates and allows encryption, digital signatures, authentication, or
any combination of these. The S-HTTP type of transaction security is more secure than a user ID and
password, thus it is mostly used by financial institutions (for example for credit-card purchases over
the Web).
Since MobiLinkIP provides S-HTTP connection to its pages of configuration, this means a higher
degree of security for you.
SMS
-
Acronym
for
Short Message Service
; means the transmission of short text messages to and
from cellular phones. The messages must be text only (no images or graphics) and not longer than
160 alpha-numeric characters. Operators of Mobile Phone Networks use a spare data channel to send
SMS messages. You may send SMS messages to another mobile subscriber, the mobile operator
can send you phone settings over-the-air or commercial companies may send dedicated content to
your mobile terminal. The embedded firmware allows MobiLinkIP to send and receive SMS (via mobile
network) from the computer connected to it.
SIP
– Acronym for
Session Initiation Protocol
- a protocol proposed standard for initiating,
modifying, and terminating an interactive user session that involves multimedia elements such as
video, voice, instant messaging, online games, and virtual reality. It is one of the leading signaling
protocols for Voice over IP, along with H.323. MobiLinkIP is used for VoIP calls that use the SIP
protocol.
SIP clients traditionally use TCP and UDP port 5060 to connect to SIP servers and other SIP
endpoints. SIP is primarily used in setting up and tearing down voice or video calls. However, it can be
used in any application where session initiation is a requirement. These include Event Subscription
and Notification, Terminal mobility and so on. There are a large number of SIP-related RFCs that
define behaviour for such applications. All voice/video communications are done over separate
transport protocols, typically RTP.
TCP/IP
– Acronym for Transmission Control Protocol / Internet Protocol. It was established by the
Defence Department of the USA for communications between computers. It has been at first
TOPEX S.A. +4 021.408.39.00
Page 78 of 80