What Type of telephone line has 10 lines but all can be answered by dialing one number. (No PBX, telco side)?

Question

What Type of telephone line has 10 lines but all can be answered by dialing one number. (No PBX, telco side)?

Answer 1

In order to get 10 lines answered by one number the lines must be equivalent (terminal hunting) which must be completed by the telco.  You might be able to "call forward busy" the first line to the second, the second line to the third etc but I would not recommend it.