[Asterisk-Users] Systems Admin; Telecom Newbie - What do I need?

[Rich Adamson]

> I think one thing you may want to remember is that porting numbers to a
> VoIP provider can make them EXTREMELY hard to ever port back to a normal
> telco provider.  Also, if there is ever a problem with the VoIP provider
> (which has been common lately) then you are in deep trouble.  For a
> mission critical install, it is highly recommended that you get land
> lines pulled in via whatever means meets your needs and that you use
> VoIP providers only as a backup to your hardwired system.  Saving bucks
> on long distance is great but betting the farm on a zystem that provides
> dial tone from purely VoIP can be highly dangerous.  

Or, call forward your existing numbers to itsp allocated DID numbers.
If you don't like your itsp, call forward to the next one. Works fine.