Thank you all for the information, I made a 25 to 9 pin cable, with the data obtained from Inter-Tel support. The simple design was: Wire from pin # 8 gets relocated to pin # 20 & a jumper from Pin # 1 to # 7 - Everything works now, But....

I do not have the old system " Password " is there a backdoor password to enter the system, or do I have to pull the Battery to FORCE a DEFAULT settings to enter the system ?