After my post in November last year on the successful upgrade of a Asterisk PBX at Wanaka Wastebusters a lot has happened.

The reason I installed a local Trixbox server in the first place was to take advantage of cheaper calling, have more lines and to make administration of the system easier. At the time the local Voip Trunk providers (who all seem to resell the 2talk service) did not have a good multi extension feature. Our trial with Kiwilink never gave us a solid way of transferring calls.

Our Trixbox setup was good, but I was not happy with the possibility of failure with the laptop it was running on. So we invested in a IP01 embedded box from Nicegear. This solution worked ok but we had repetitive problems with incoming calls dropping. I’m sure one of the 200,000+ settings in Asterisk could have been tweeked but damned if I could find which one.

Soooo…in the meantime 2talk had a better implementation of their line manager and I decided if we could manage all our lines and features from one login a hosted service was the way forward – into the cloud we went. I decided to invest in a bunch of Linksys SPA942 deskphones to get some continuity in our endpoints, set them all up and sat back with fingers crossed sweating.

I should mentioned I also doubled up our broadband connection with 1 x wan through hd.co.nz and one through netspeed.co.nz with a fail over at the router level. I figured the extra $60 a month would pay itself back easily through saved calling costs.

The result has been, so far, excellent. We’ve had failures on both internet connection, fortunately not at the same time so nobody but me know. Perfect. Calling has been of high quality and transfers, auto attendant and voicemail to email have all been seamless.

The only comment I have is that the 2talk web interface for the line manager is buggy and badly designed. I couldn’t change the caller id for the lines from it and the email for voicemail setting there didn’t seem to work. I’d love the job of redesigning the interface – actually I’d like to do the 2degrees one as well, but that is another story :-)

What does this mean? Well…Wanaka Wastebusters, where it is installed (please do not steal it :-), has one phone number people can ring in the normal phone like way. That phone number has been parked at a service provider and there enters the internet. Over the interweb thingy this laptop talks to the provider and can conduct up to five simultaneous calls. At Wanaka Wastebusters there are ten extensions that each have voice mail and are available through the IVR (a recorded message you get when you ring the number) – all of these features are running off the laptop. People can dial within each others extensions and transfer calls etc and generally be productive hopefully.

Nice – but why? Well it saves a few hundred dollars a month on line charges for extra phone lines with Telecom and means we can add users and features as we need them. We can also make use of cheaper calling rates and eventually peer directly hopefully with other businesses using SIP which is the glue like protocol making all the VOIP stuff happening. It is an acronym world.

Pretty cool use for an old computer huh. I’m not sure how long a laptop will last always on but it has been working for 5 weeks no problem and because it has a battery even has its own UPS built in. We might have a sweepstake on what gives up first – the power pack I’d say.

In case of failure or hacking I am building another one on a old IBM Pentium 4 which could be plugged in as a replacement. What I would really like though is a few Sheevaplugs, amazing 5w super computers. That is ‘super’ as in awesome not as in a Cray – although they are probably faster than most Crays ever built… maybe one day …

I get asked a lot about how it works and what we use so here is a brief explanation.

We have a 2.4ghz standard wifi A/G network setup in a star configuration. The central house has a Linksys WRT54G wireless router attached to a standard ADSL 2+ modem, a very reliable unit which has external antenna connections unlike some other wireless routers, you can get these pretty cheap on Trademe. Attached to that and mounted on a small mast is an omni directional antenna from www.gowifi.co.nz something like this.

Each client house has a Linksys WAP54G wireless access point, these are again solid units and we used them because they can be used in reverse as a client instead of an access point. Note – there is a strange bug when configuring these, you need to use IE or Chrome when accessing the configuration panel as some editions of Firefox do not work with it. These have a directional antenna (similar to this) aimed at the hub. Most of these are inside houses and aimed through a window.

Almost all our failures have been at the modem, either it losing its session and not restoring it properly with the provider or it dying completely. We also have a troublesome shelter belt that has grown up and blocked two houses – the gear is true line of sight stuff.

This has enabled our house to lower its telecoms bill from $100+ to $20 by using a voip provider for the phone. Voip is getting better and better in this application but was inconsistant for the first year – still, we are early adopters and that is what you get.

I have been slightly obsessed with VOIP for a while, mucked around with Asterisk on and off and have used World Exchanges VFX service at home for a year or two. I’m not sure why I have this obsession – I suspect because it is such an attractive disruption – voice, and all its features, becoming as cheap and easy as email.

I managed Cactus to start using VFX for it’s main calling line a while back, and now hardware QOS has improved and DSL speed settled down (you can finally get full speed both ways relatively cheaply) it is time to try on a larger scale. The benefits are too big to ignore.

• Hosted PBX – no hardware investment…and features+ like the below…
• Web interface to control the PBX as opposed to semi-blind phone keypad inline programming
• Voicemail to email – email seems to be THE collation point for business communication
• Softphones like X-Lite, point and click phone action! Address books!
• Cheaper calling
• Movable phones – take your latop to the other side of the world and you are still on the same system

I have been working on the implementation plan and have agreement from Wastebusters, I’ll write it up here as it happens.