Latest SME telephone systems

[vxr8mate]

Hi. Just wondered what the latest telephone systems / solutions are for small businesses.

We inherited an 8 line ISDN system which to be frank is archaic.

As ever, we don't have millions of pounds to spend, need to contact the European space station or hold 'webinars' (whatever they are). We just want to lower our mobile call costs (some 80% of our calls are to mobiles), have a reliable service that is easy to use.

Any suggestions or links to sites would also be appreciated.

Thanks

[vxr8mate]

Thanks to all for your help.

Would we need a decent internet capability? At present it's just a basic 'cheap' package with BT (12mbps download) but could easily switch to fibre if needed.