Back in the day and still today, a Verizon phone customer (analog or digital) has access to a really beneficial feature called Busy Redial.
If you dial a number (hosted by any provider, not just Verizon) and it is busy, you can dial *66 and hang up. Verizon will call you first when the number is free and when you pick up, redial the number that was busy so that you don't have to keep calling manually.
I don't know how Verizon does this, especially when the dialed numbers with another provider.
Is there anyway for RC to look into doing this feature?