TL1 Alarm and
The world of Alarm and Control is
undergoing a dramatic evolution. It is
powered by the extraordinary capabilities of IP and SNMP. New IP
vocabulary is used with Manager and Agent paralelling the more
conventional expressions like Master
and RTU, and traps are now transmitted rather than alarms.
applications, once the exclusive domain of large telecoms is now of
industrials and ISP's. SNMP itself has
seen a rapid evolution to better assume its new responsabilities. It is
tool to the already considerable set of protocols and standards at your
to improve the reliability, manageability and cost effectiveness in
your network. This page outlines, in a historical context, the latest
in Masters and Remotes that provide
you with the tools you need to evolve your monitoring
network towards IP in a progressive and cost effective way. Let me
first stress two
important things that unlike specs,
cannot easily be quantified, and as a result have a tendency to get
Quality and Standards.
View the the Dantel
Product quality is the first
choosing a product and manufacturer. A dynamic Quality Control program
necessary element of a quality product design and manufacture, and the
only means of maintaining product
integrity during its production life. The vigilant application of
programs like ISO 9001 by a manufacturer is a
good indication of product quality assurance and of your network
integrity as it
grows over the years. The dividends of a company's past investments in
should be clearly measurable in the repair statistics of a
products over the past decades. This, in turn, should be reflected in a
operation of your Alarm and Control network. A longer warranty period
substitute for proper quality control.
Learn more about
The importance of standards in defining
interfaces and protocols is
nowhere better illustrated than in legacy Alarm and Control equipment
operation today. The
plethora of proprietary protocols in legacy equipment product is due to
a lack of existing standards at the
time of manufacture. The
continued presence of manufacture discontinued products on the network
has led to an important need
for legacy protocol mediation. Users of such equipment must face the
finding a mediation device or replacing the legacy equipment. Designing
network with standardized protocols is an insurance against
obsolescence now and
in the future.
Learn more about SNMP.
Learn more about TL1.
Learn more about TCP/IP.
Alarm and control System.
Alarm and Control systems have
traditionally consisted of a Master
Station polling or interrogating a number of distant Remote
Units, RTU's, for the presence of alarms. Each RTU is wired with the
minor alarms made available as closures from the various telecom or
equipment located at a remote site. As technology progressed and
became more powerful, smaller and more affordable it became feasible to
distribute the processing power into a hierarchy blurring somewhat the
Remote concept. The same technology and the evolution of protocols like
pushed the capability of the personal computer such an extent that the
independent Master became the PC. With its basic OS and SNMP it can
handle small networks, with dedicated specialized software it can
networks leaving only the largest to mainframe computers.
A success story, Fully Modular, Unsurpassed Reliability.
Dantel's 460ACS, still widely
used across North America, made
Dantel's reputation for unparrallelled reliability and unprecedented
in an RTU. Its flexibility in supporting multiple protocols is
and can be appreciated in the following partial list: ASCII, DCM, DCMX,
DCPS, DCPF, E2A, E2, SNMP, TABS, TBOS, TCP/IP, Teltrac IV and TL-1.
common network interfaces compatibility is no less impressive:
RS-530, USB, X25(V.35) and 64Kb. This concern for equipment versatility
carried through to Dantel's other products and our design teams are
to design products for your special interface needs.
Many types of equipment,
environmental, and other Central Office
alarms (discrete and serial) can be collected and processed using
protocols for transmission to Network Operating Center (NOC) using any
several widely accepted standards. Each 460 system provides modular
by adding cards in a 400-type shelf. Dantel supports autonomous and
protocols to insure that your alarm system enjoys the best efficiency
reliable operation possible. Key to the polling
concept is that any RTU not responding is deemed in alarm thus making
the alarm system
fail-safe. Many techniques (such as heartbeat alarms) also exist for
networks to insure their integrity as well.
Over the years Dantel/Dantek
has created many thousands of
unique 460ACS applications to suit our customer's requirements. Please
so to we can design a optimal solution to suit your own needs.
SNMP Remote Terminal Units: RTU
SNMP, simple network management
protocol, was designed to monitor
computer networks like a local area network LAN. It was typically used
password authentication failure at a remote server or some similar
event on the
network. A new terminology of trapping events rather than sending
evolved. The next step was to use conventional RTU's with a SNMP
include open doors and alarms generated by other equipment on the same
SNMP was very different than conventional polling and some critics
fool-proof nature of alarms against the simple transmission provided by
The rapid evolution of SNMP from V1 to V2C and V3 has silenced most
while the use Ping and Inform has made it into a reliable alternative
but with one major advantage. The trap can effectively identify itself
text. This the conventional alarm could not do. The new protocols and
bring a true evolution to monitoring with capabilities undreamed
of a few
years back. The remote can be small and cost effective while providing,
your favorite browser, extensive information on demand. Or like the
460ACS it can
be modular and flexible providing larger sites with full monitoring
Wether monitored from a pc or a dedicated mainframe the SNMP
writing history providing monitoring capabilities with simply
features, performance, flexibility and cost effectiveness.
Dantel's WebMon: The
WebMonEdge: 8 Alarms and 2 Controls.
The Edge is shown on the upper
left. One unit operates at the
plant in Fresno to demonstrate its capabilities. The Edge acts as a
can be accessed trough its IP address(184.108.40.206). A real image on
is worth many words so you may just click on the next link or type the
on your browser as http://220.127.116.11. Note the log-in area on
right corner and the optional video image of the site on the right. The
unit can act as a
secure server with DES 40bit encryption, a standard on most browser for
Dantel's WebMonEdge: acts as a
WebMonMatrix: Same performance, rack mounted, modular approach.
TL1 Remote Terminal Units: RTU
The elegant evolution of the network
requires the integration of non IP
elements into the network and the even the growth of non IP segments.
conventional protocols like TL1 are often the solution of choice as it
perform well with no more than RS232 or a 202 modem link. Here the PM
shines through its versatility and simplicity of wiring in the
and the not so conventional.
Master Eagle: 64 to 256 Alarms, 4 to 32
The traditional function of the
Master Terminal is to poll all
RTU's in the network and report alarms in a fail-safe fashion. Any RTU
responding is deemed in trouble as are the alarms of the equipment it
The MT must then associate a name and location for each of the alarm
reported. A data base is used to keep all alarm description. Finally it
the information to the human operator for action. Controls proceed in
same but inverse fashion. The software nature of the Master make it
for protocol mediation or conversion or interfacing to a LAN or the
a critical part of the system, the hardware and it's Operating System,
a powerful base with many networking abilities built-in. Windows XP for
has remarkable capabilities when compared to previous generation OS,
like NT, 98
or 95 and this new generation provides a very strong feature base,
in networking, on which to build a Master
Terminal. The new technology requires that the Master in addition to
alarm description of conventional systems like 460ACS on simpler
protocols like DCP-F,
be able to interface to RTU's on more complex protocols like TL1 and
SNMP which integrate
much of the description for alarms as part of their structure.
large networks a need to have a Master report to a senior Master
communication, usually TL1, between masters or a dedicated mainframe