No.
Setting Up dial Up connection By using CDMA Wireless modem?
Yes RJ12 connectors are used to connect wire to dial up modem
For a dial-up connection on a Mac you would use the internal modem or an external modem connected via USB.
dial-up modem
No, DSL modems are meant to receive data directly and are unable to dial. You will need a modem with dialing capabilities to use dial up.
You do not need a dial-up modem. However, you will need to either purchase or rent a DSL modem, which works differently from a dial-up modem, and is usually outside the computer.
The LAN port is not used for a dial-up connection. A modem is used for a dial-up connection.
Ethernet cable is RJ 45. Dial-up modem is RJ 11
Usually, the term "dial-up number" refers to the phone number you dial with your modem for dial-up Internet.
The G3 and G4 iBooks had a built in modem which can connect to a dial-up service.
RJ11