Quote:I think the key thing to remember is that Voip consumes considerable broadband bandwidth
A good quality VoIP call uses just around 100kbps upstream and downstream. Almost all broadband packages give you at least 128kbps upstream (with far more downstream) - so no problems!
The amount of bandwidth you use depends on the CODEC the call is using. A CODEC is the way in which the call traffic is reduced/compressed. A low-rate CODEC can use as little as 30kbps - so reasonable quality VoIP calls are possible with dial-up.
You have to be careful that you're not using your web connection for downloading at the same time as a VoIP call as this could cause problems. But many new routers have QoS (Quality of Service) that give priority to VoIP calls over data.
Quote:nearly all of the cheaper broadband packages have data capacity caps.
Some - but more and more don't. And if you do the sums you'll see it's very hard to hit a cap with VoIP. You would have to be on the phone an awful lot.
Quote:At the moment it seems hard to use Voip as conveniently as a Pots phone call from other extensions in your house when you are not at a computer keyboard etc. To replace POTS Voip needs to be as convenient as POTS is.
There are so many VoIP solutions to this: WiFi VoIP handsets; Multiple DECT handsets that link to your PC via Bluetooth; Multiple VoIP IP hardphones on ethernet/CAT5; multiple POTS phones with ATA adaptors all signed in to the same VoIP account or even POTS phones with ATA with different accounts so you have extension numbers! And of course different accounts for different user (Mom, Dad, Son etc....) so you can limit usage.
Quote:Also as a sideline when will Voip come to mobiles? Presumably only once 3G and/or 4G handsets are fairly universally in use?
Motorola already have a VoIP/Mobile handset out. The chipsets are in production an soon the market will be flooded with such mobiles. They don't need 3/4G as the phone is effectively two phones:
The first communicates via GPRS; and the second via WiFi VoIP to a nearby access point. The VoIP is NOT accessed via the phone's web connection.
The trick will be to get the phone to "roam" between WiFi AP's and mobile masts seamlessly. At first the providers (Orange) etc... will try and pump us for dosh by only allowing such phones to sign-up to their own (chargeable) VoIP services. But soon the hackers and good-old competition will kick-in and the VoIP calls will be free via WiFi.
The main issue is that most Broadband WiFi in airports/Starbucks etc... has little upstream capacity and downstream does not give priority to VoIP. Plus if you have 20 WiFi DATA users on a 1Mb connection they will each just experience a slow connection. But 20 VoIP users would experience their calls breaking-up. Plus normal AP's cannot handle VoIP in the same way as Data.
The solution is a new generation of AP's made for VoIP and Data.
Here endeth the lesson.
All the info and more at:
www.voip-info.com