Companies that use Asterisk?

The company I work for is upgrading our PBX. I am pushing hard to be given the chance to use Asterisk. But my boss doesn’t want to take any chances with the phone system, as it is the life blood of the company. So I need to find a way to convince him that this is a solution that is reliable and performs well. The best way I can think of is showing him a list of companies that are happily using Asterisk. But I have been unable to find any. Does anybody know where a list like this might exist or have any other ideas on how to convince him on the reliability and performance of Asterisk.

Thanks for any help,

Adam

give him the pricelist, compare with oher solutions, make some countermeasures to provide lines if internet fails.