This RTU Can Cover Your Entire Environmental Monitoring Network
Environmental Monitoring Network Unit
The NetGuardian 832A from DPS Telecom does as much as an RTU can and then some. Depending on how you want to use it, the NetGuardian is an SNMP proxy agent, an RTU, or an all-in-one alarm monitoring system — and that's just its most prominent functions. The NetGuardian is one of the best all-around SNMP environmental monitoring network solutions we've seen in some time.
Quick Summary Review
Pros: Complete SNMP proxy agent and monitoring system
in one RTU
Get more info on the NetGuardian SNMP environmental monitoring network unit
DPS Telecom network management
systems - www.dpstele.com
The NetGuardian is designed for standard telco operating environments. It's 1 RU in size, mountable in 19” or 23” racks, with dual –48 volt power inputs. NEBS Level 3 certification is available.
The NetGuardian supports contact closure and analog alarms, plus eight terminal server ports for accessing telephony equipment. (All images courtesy DPS Telecom.)
The NetGuardian offers 32 contact closure alarms, eight analog inputs, and eight control relays — enough to provide solid alarm coverage for telecom equipment, power supplies, environmental factors, door alarms, etc., at a medium-sized site.
If you need to monitor more than that, you should check out the NetGuardian Expansion Unit, which adds an additional 48 contact closures to the NetGuardian's base capacity. Up to three Expansion Units can be daisy-chained off a base NetGuardian, for a total potential capacity of 176 contact closures.
Cool feature: 32 ping alarms, providing a convenient way to check on IP equipment at your remote sites.
Even cooler feature: The NetGuardian's built-in terminal server, which gives LAN access to remote site routers, PBXs and other telephone switchgear. You can telnet into these devices right from your desktop PC and access their configuration and control interfaces.
The NetGuardian 832A mediates 32 discrete alarms, 32 ping alarms, and 8 analog alarms to SNMP traps, and supports multiple SNMP managers at multiple IP addresses.
SNMP proxy agent
The NetGuardian's primary job is to mediate remote site alarms to SNMP traps and forward them to an SNMP manager. If you need to integrate telephone switchgear monitoring and remote site environmentals into your environmental monitoring network, installing NetGuardians at your remote site is a simple, cost-effective solution.
All NetGuardian inputs can be mediated to SNMP traps — but you can select to not send a trap for each individual alarm, so you can filter out any unimportant stuff.
The analog inputs send traps for four thresholds, plus the SNMP manager can retrieve live actual readings from analog inputs by issuing a GET command. SET commands issued to the NetGuardian will activate the control relays, for turning on-site equipment on and off, locking and unlocking doors, etc.
The NetGuardian can report to up to three SNMP managers at different IP addresses simultaneously, which makes it great for filtering alarms to different departments.
The NetGuardian can also report to DPS' own master unit, the T/Mon Remote Alarm Monitoring System.
Or stand-alone environmental monitoring network solution
Alongside its SNMP proxy functions, the NetGuardian supports direct access through a Web browser interface.
You can monitor and acknowledge alarms without an SNMP manager or any other equipment. This makes the NetGuardian a very compelling choice for remote site maintenance departments who are required to send all alarms to a central operations center. The NetGuardian will forward alarms to the SNMP manager at the NOC while you still have local alarm visibility of your sites.
Rounding out the NetGuardian's local environmental capabilities is built-in support for pager and email notifications. Field techs in particular will like getting pager alerts directly from their remote sites.
The NetGuardian supports a variety of accessories to add more functionality, including a visual surveillance camera, a wall-mount alarm notification panel, and a keypad facility entry system.
The NetGuardian concentrates a lot of functions into just one unit, bringing a lot of value to your SNMP environmental monitoring network. We recommend the NetGuardian, but with one reservation — if all you need to do is to monitor a small number of contact closures, you don't need the full capacities of the NetGuardian. But you might be interested in some smaller SNMP remotes that we feature in another review.
Get more info on the NetGuardian environmental monitoring network unit
NetGuardian 832A Specifications
Alarm capacity: 32 contact closures, 8 analog inputs, 32
Control relays: 8
Dimensions: 1.75"H x 17"W x 12"D
Weight: 4 lbs. 3 oz. (1.9 kg)
Mounting: 19" or 23" rack
Power Input: -48VDC (-40 to -70 VDC)
Current Draw: 200mA
Fuse: 1 Amp GMT
Operating Temperature: 32°-140° F (0°-60° C)
Operating Humidity: 0%-95% noncondensing