Note: Some firewalls might log a potential attack from their server if you choose to test security of your system since they are testing for vulnerabilities.

* SG Speed Test

A quick download speed test to estimate your connection speed at time.

* SG Network Tools

The SG Network tools section includes many common network tools such as PING, TRACEROUTE, WHOIS, etc.

* SG Bits/Bytes Conversion Calculator

The Bits/Bytes calculator is a useful tool for quickly converting bits/bytes, etc. It takes into consideration different conventons while calculating data communication rates and storage space.

* SG RWIN/BDP Calculator

The RWIN/BDP calculator can be used to estimate TCP Window values, based on Bandwidth*Delay Product (BDP for short). It can also calculate maximum bandwidth based on RWIN and latency values, and perform a number of different conversions as well.

Drop in and test them out (no pun intended). At very least you may learn something about your current system needs or performance.

That was our first option. Relying on human communications leaves too much on uncertainty. We have to make it completely idiot-proof. This option is not fool proof. Somebody might claim that they did not get message.

Our second option was to re-program fire alarm system to exclude all areas in clean rooms. This option was a bit tricky as there were some uncertainty as to how alarm bells were wired up. We had to admit that although everything was drawn on paper on as-built drawings, we were not 100% sure whether re-programming will cover all alarm bells inside clean rooms or not. Moreover, there had been some renovation done on existing building and nobody had taken trouble to test alarm bells then. So this option was also shelved.

Our third option was to re-wire existing bells specifically only for offices, so that we can trigger only office areas. This seems a pretty good option, except that preparation re-wiring work will have to be done at installation itself. During re-wiring period, office itself would not be protected by fire alarm system. In addition, original wires would need to be disturbed and re-looped - something engineering people would not be keen to do - as it might give rise to other unexpected problems.

Our fourth option - to fabricate and install addition bells with triggering switches and fix them just beside existing bells seemed to be best option. By using additional bells, batteries, switches and getting them wired up at a portable stand in a workshop, they could be tested, carried along and put in place within a very short time. The best feature of this option is that original fire alarm wiring need not be disturbed at all.

Choosing fourth option, we fabricated three sets of alarm bell triggering units and placed them at appropriate places at offices. When time for triggering alarm bells came, an order was issued through walkie-talkie and bells were triggered by technicians at those stations.

So, we managed to organize fire evacuation drill for offices only. Nobody evacuated from manufacturing clean rooms because bells were not sounded there. All office workers had their evacuation drill and everything went on smoothly.

A potentially huge manufacturing loss was avoided by adopting a simple idea. A workable idea born out of necessity.

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