Why is it always a bad connection when phoning call center support agents working from home?

Their phone system was not designed for the latency of routing the phone traffic from their call center to the employees' houses.  So the quality of the calls are degraded.  In other words, when you place a call, the data for the call gets sent to the call center.  From there, it has to get sent to the agent's house, back to the call center, back to you. 

This of it like this. You mail a letter to your mother's house.  She isn't there, so someone sends the letter on to where she is.  She responds but the response goes back to her house, where the person forwards it on to you.

It should not be but sometimes there is a bad connection. 

Most are using cell phones instead of hard-wired connections.