The COM port settings are correct, but ADTRAN uses a proprietary pin out assignment, and other vendor's adaptors will not work without proper rewiring. You can view the pin-outs here: Connecting a PC Terminal Console to the RJ-45 Control-In, Chain-In or Craft port of an ADTRAN?
The default IP address on the TA 600R is 10.0.0.1 /24
The TA 600R will only terminate 1 T1 using PPP, Frame Relay, or HDLC encapsulation. You can view a configuration video guide here: [video] Configuring voice and data on a Total Access 600
I hope this answers your questions,