Motorola ERROR 23 Phone "eks" Questions

NEC DTU-8D-2 EKS. Can I program system or a phone button to grab an outgoing CO line and speed dial a number, then transfer an incoming call to that line/key? Not likely. You are talking in a circle ...

i have an err 4 message goodevening, i have an error 4 message coming up when i try to turn my vhs akai vs-g2 dpl ek-n, do you know how to resolve this error or do you know anyone who can many thanks ...