A:AnswerNo, this phone can work with up to 5 lines, two of which would require a phone jack but the other three do not. The three which do not require a phone jack are the two cell phones and the softphone (computer phone). I do not have a landline and use this phone in connection with two cell phones.
A:AnswerThe phone will not do this but you can set your phone service up with the phone company such that you can have a busy line forwarded to a 2nd number.