SLUG Mailing List Archives
Re: [SLUG] Re: OT Voice of IP via ADSL
- To: Ben Buxton <bb@xxxxxxxxxx>
- Subject: Re: [SLUG] Re: OT Voice of IP via ADSL
- From: Anthony Wood <woody@xxxxxxxxxxxxxxxxxxx>
- Date: Fri, 13 Feb 2004 11:09:46 +1100
- Cc: slug@xxxxxxxxxxx
- User-agent: Mutt/1.2.5i
On Thu, Feb 12, 2004 at 03:03:33PM +0100, Ben Buxton wrote:
> Richard Hayes <nada@xxxxxxxxxxx> uttered the following thing:
> > Dear list,
> > Now that xDSL connections are as low $40 /mth, is it possible to run VoIP?
> You can run VoIP on any ip connection, and most are now fast enough to
> have it run fairly well. Have a play with gnomemeeting (which talks
> to netmeeting clients - yes it's in xp, go start->run->conf).
> > What are the problems and can you call a 'normal' phone?
> The problem is that very few ADSL providers have true QoS over
> the ADSL networks. My company has been playing with offering true
> QoS over consumer ADSL (using separate ATM VCs) and so far it's
> very promising.
> Of course, you can only guarantee quality if you control the entire
> path of the data - once it leaves your network there can be no more
> guarantee (without all parties in the path having SLAs).
> As for calling normal phones, VoIP is just a way to get voice from
> one IP address to another. You still need to gateway it to the PSTN.
We use asterisk here as our PBX, and VoIP from here to a number of places.
256/64 ADSL is enough to have one phone call (two if you're doing nothing else) going
out VoIP using GSM Full Rate (like mobiles).
To plug it into the PSTN we have two "AVM Fritz!Card PCI" which each plug into an
OnRamp2 (EURO ISDN BRI) from Telstra. This gives our company 4 lines. We have a separate line
The main problem with Asterisk in Australia for hobbyists is the lack of (any would do):
1) Cheap, good A-ticked hardware that is Asterisk Compatible
2) VoIP providers who offer incoming
3) Easy/Cheap way of getting hardware A-ticked
It costs $10,000 - $20,000 for an importer/manufacturer to get a card A-ticked so they can be plugged
into the phone system without a letter of permission from the Telco. This is passed on to the consumer -
this hardware is pretty low-volume.
If you are keen:
A-ticked Fritz!Card ~$350
Convert Analogue Line to ISDN2 ~$125
Extra Line rental $30/mo