Archive for the ‘VoIP’ Category

BLF, asterisk reloads and SIP Registry …

Wednesday, November 5th, 2008

Something which a number of clients has been complaining about is that the BLF lights on the GXP phones just stop functioning.  The stock standard answer until now has been “reboot the phone” … however, the calls keeps coming.  So what can be done to fix this more permanently?

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A PC Can only do one thing at a time …

Monday, October 27th, 2008

Whilst the above is probably true, it no longer holds, most processors nowadays are at least dual-core, in other words, we can now do TWO things at a time!

Now, the above is the newest argument I’ve seen against VoIP systems such as asterisk! Can you imagine it?

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A strategy for recording calls and minimizing g729 license usage

Saturday, September 6th, 2008

When making recordings of g729 channels at least two decoders will be used. This means that if you have 10 licenses you can have a maximum concurrency of 5 calls going through your system that is being recorded. For anything but the smallest of switches this is not acceptable.

In addition, recording to .wav is a rather space-consuming process. Instead, we’d like to minimize the g729 license usage, as well as optimizing disk-consumption.

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VoIP – So how (in)secure is it really?

Friday, August 1st, 2008

It’s bad. No, it’s worse than that.

It’s generally accepted that email is “available for the world to see” in security circles, essentially it’s transmitted in plain-text over the internet. Plain-text in this case has nothing to do with HTML vs ASCII text, but instead refers to the fact that your email isn’t being encrypted before being transmitted. VoIP is exactly the same.

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