New Video: Wireless SNMP RTU's Use SMS To Eliminate Firewall Holes

In this quick 4-minute video, you'll learn how you can use wireless RTUs to report alarms directly to your smartphone, T/Mon master, or SNMP manager...

RTU's have technically been capable of sending SNMP traps over cellular networks for some time, but trying to make it work has caused more than a few headaches.

First, you had to get your alarm data out of the cell network so it could reach your SNMP manager. This involved choosing between a few expensive options with recurring fees. You could pay an extra monthly fee to your wireless provider to receive a static IP address for your RTU. Alternatively, you could pay a monthly fee to a third-party data provider to establish an IP connection to your GSM/CDMA remote. None of these options were very good, since both involved an additional recurring fee for each and every wireless alarm remote you deployed.

Second, in order for SNMP traps to reach your SNMP manager from the Internet, you had to punch a hole in your corporate firewall. At best, this led to a lot of red tape, hassles, and delays from well-intentioned IT departments. Even minimized firewall holes present a security risk, after all. At worst, IT departments simply said "No way" to the firewall accommodations required to accept SNMP from GSM/CDMA networks.

What you need to solve these problems is, within your network, a simple receiver device that can accept SMS text messages via GSM/CDMA or via the TAP Gateway . Then, instead of trying to establish a troublesome and expensive IP connection wirelessly, your remotes can simply report alarms to the receiver device's phone number using SMS text messages. This is the same transport you might use to send a cell phone text message to a friend or family member.

Upon receiving a text message, the receiver device would translate the alarm into a standard SNMP trap and report it via LAN to your SNMP manager. In this way, you're able to transport alarms via GSM/CDMA wireless and bring them into your SNMP manager without allowing any direct IP connection through your firewall, as show in this topology map.

An RTU with built-in SMS capability also means that you can send text messages directly to your cell phone. This completely eliminates the need for an alarm master in networks small enough for direct management of individual sites.


Wireless Topology

Wireless RTU diagram

Toplogy drawing of wireless RTUs from DPS Telecom.

You can order your NetGuardian G5, 216 G3, and NetDog 82 BW with an optional GSM/GPRS or CDMA wireless modem, which provides wireless network connection. The wireless modem is powered by the same power as the remote, which provides more secure, more robust operation than modems that run off commercial power.

With this build option, you get advanced alarm monitoring via wireless. This provides the critical primary or redundant alarm reporting path you must have to maintain full visibility of your mission-critical remote sites.

Achieve Monitoring Where You Never Could Before
A wireless IP modem is your best friend at sites where you don't have existing transport. You get the alarm monitoring you need - all without spending a dime on expensive infrastructure.

Add a Powerful Alternate Reporting Path at Just About Any Site
Even if you have a LAN connection at a site, a wireless IP modem is an excellent backup during LAN failures. How important are your sites? What would happen if they went down? Shouldn't you protect them with a complete backup reporting system?

Call DPS today at 1-800-693-0351 to learn more about wireless RTUs.


To see how SMS-based wireless RTUs will fit in your network, send email to sales@dpstele.com or call 1-800-693-0351.

To receive a price quote or ROI analysis...

Call 1-800-693-0351

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