Yes you need a:
  • Tel Control, Inc TC-1041 MLX-42 4-line caller identification interface
  • Tel Control, Inc TC-1082 MLX-82 caller identification interface


One is for 4 lines and the other for 8 lines. You can chain them together.

I am thinking that you also need S5.FXX software for caller ID.

The Caller ID box connects to the RPM RS-232 of the CTX and the baud rate would be set at 9600.

Feature Key Programming: Function, #, 3

This will allow you to view and/or change a button.

The code for Feature Code Look up is Function # 5


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