Open source easy-to-customize call center solution?
问题 Note: A have asked this question at the Superuser community first, but since it involves a lot of software-building-related topics I decided to move it here. I need to provide a simple call-center solution to a small local business. They have a local 6-digit land line number. They accept calls locally, i.e. nobody calls them from another cities. The problem is that they started to lose customers, because with a certain amount of calls every day it has become impossible to reach the local