T/Mon NOC Vs. T/Mon SLIM: Which Master Is Right For You?

If you've gone to an ice cream parlor lately, you know that having a choice can make it difficult to know what you want. DPS Telecom now offers two very different alarm masters: the heavy-duty T/Mon NOC and the medium-capacity T/Mon SLIM. How do you know which one's right for your network?

Selecting the right alarm master can be tricky, but you can identify the most important factors for making your decision. The key questions are:

  • How many alarms you need to collect
  • How many sites you monitor
  • How many users you need to support
  • How much data processing you need to do with your alarms

Here are some typical scenarios of where you might currently be with your alarm monitoring, and what is the right alarm master for where you are:

NetGuardian 832A RTU
The NetGuardian 832A remote telemetry unit provides independent alarm monitoring capabilities through its Web Browser Interface and pager/email notification.

Maybe you don't need an alarm master

If you're only monitoring a few sites, you might not need an alarm master at all. The NetGuardian 832A remote telemetry unit provides standalone local alarm monitoring capability that lets you monitor alarms directly from the RTU.

With the NetGuardian 832A's built-in Web Browser Interface, you can view alarms and operate control relays from any computer on your LAN - no master required. And the NetGuardian's pager and email notifications will send alarm notices directly to your pager or email in-box, giving you very easy 24/7 unmanned alarm notification.

If you're working with a small number of sites, and you don't need a central system for alarm presentation or notification, a small network of NetGuardian 832A units can provide all the monitoring you need.

But when your network starts growing, you should think about upgrading to a T/Mon alarm master system. If you have more than 6 or 7 sites, keeping track of all your alarms on separate pagers and web browser system gets complicated. At that point, you need central alarm presentation, and you should start looking at a T/Mon SLIM system.

T/Mon SLIM Remote Alarm Monitoring System
T/Mon SLIM provides medium-capacity monitoring, consolidating alarms from several remote sites to one local network view.

T/Mon SLIM: centralized alarm presentation and sophisticated notification - scaled to the needs of small and medium networks

The new 1 RU T/Mon SLIM is a just-right solution for when you need more than individual RTUs, but you don't need the full power of T/Mon NOC. T/Mon SLIM provides all the same alarm monitoring capabilities as T/Mon NOC, but at a capacity suitable for small and medium networks.

T/Mon SLIM can monitor up to 64 network devices or 7,500 discrete alarm points. Primarily designed for modern LAN-based network environments, T/Mon SLIM provides four serial ports for connecting legacy devices. Occupying only 1RU of rack space, T/Mon SLIM can easily fit into any equipment room.

Despite its slim physical form factor and medium capacity, T/Mon SLIM has all the software capabilities of T/Mon NOC. That gives you several advantages over monitoring with just RTUs. With T/Mon SLIM, you can:

  • Collect alarms from multiple sites to one central network view
  • Monitor ASCII, TL1 and SNMP devices
  • Monitor legacy RTUs from multiple manufacturers
  • Support Remote Access for multiple users
  • Maintain a long-term alarm history log from multiple sites
  • Use Derived Alarms and Controls
  • Use more sophisticated pager and email notifications

When should you move up to T/Mon SLIM? Let's compare T/Mon SLIM to the NetGuardian 832A:

  • Each NetGuardian unit can notify up to eight pager carriers or email recipients/ T/Mon SLIM can notify up to 999 pager carriers or email recipients.
  • The NetGuardian can only send pager and email notifications for alarms from sensors and equipment that report directly to the NetGuardian at its site. T/Mon SLIM provides pager and email notifications from several sites.
  • NetGuardian pager carriers and email recipients are tied to specific NetGuardian units at specific sites. T/Mon SLIM pager carriers and email recipients can be organized in groups and be rotated on a regular schedule from site to site. (For example, you can rotate a group of on-call maintenance technicians to receive pages from different sites during the week or on the weekend.)
  • The NetGuardian's Web Browser Interface provides remote access for four users to view alarms from one site. T/Mon SLIM provides several different remote access options (including its own Web Browser Interface) for multiple users to view alarms from multiple sites.

T/Mon SLIM is also a great upgrade choice for users of older single-user monitoring software like T/MonSC and T/MonDL.

T/Mon NOC Remote Alarm Monitoring System
T/Mon NOC provides the greatest level of alarm monitoring power for monitoring large networks with processor-heavy applications.

T/Mon NOC: heavy duty alarm monitoring for large, complex networks

If your network grows beyond a certain level of size and complexity, you need the most powerful alarm monitoring system available - T/Mon NOC.

T/Mon NOC can collect up to 1 million discrete alarm points from any number of remote sites and devices. With 24 serial ports, T/Mon NOC comfortably supports both LAN devices and large numbers of serial devices. T/Mon NOC has a more powerful processor than T/Mon SLIM, which makes it a better choice for heavy computation tasks like ASCII/TL1 processing or protocol mediation.

T/Mon NOC is the same kind of device as T/Mon SLIM, but it is much more powerful. T/Mon SLIM and T/Mon NOC share a lot of the same capabilities, but T/Mon NOC can apply those capabilities to a larger number of alarms and devices, and T/Mon NOC has the processing power to run several different operations simultaneously.

You should move up to T/Mon NOC if you:

  • Monitor more than 20 sites
  • Support large numbers of remote access users
  • Monitor large numbers of serial devices
  • Make heavy use of processor-intensive operations, like ASCII and TL1 monitoring and protocol mediation.
  • Use the Building Access System

T/Mon SLIM and T/Mon NOC together: local/regional alarm monitoring and centralized network management

If your network has grown very large, you may have reached a point where several different departments are responsible for different segments of the network. People working at the edge of the network may only need to see alarms from their network segment. People working at the center may want to see alarms from the entire network, but not is fine detail.

At this scale, the best solution is to have multiple T/Mon SLIM units and T/Mon NOC working together. Each department in charge of a network can have its own T/Mon SLIM, monitoring the alarms that the department is responsible for. Each T/Mon SLIM unit filters and forwards alarms to the central T/Mon NOC.

This configuration provides the ultimate level of flexibility for managing large networks. Individual departments can manage their alarm monitoring in the way that best supports their operations, without affecting how alarms are viewed at the central NOC.

Each individual department can configure its T/Mon SLIM to monitor as many fine detail alarms as needed, but personnel at the central NOC don't have to support or be bothered by more alarms than they need to see.


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