I have a MICS that I installed 2 weeks ago with DTI, 6 port comb, with PRI. After complete install was told by user MOH was not working, using right port, can here the ads playing at the phone amphenol connection. I was told I could do a backup and restore on a replacement cabinet that the sysid & PRI codes would be restored on replacement MICS? I have two MICS's at my shop and when I do the backup & restore here the sysid don't change is this what is supposed to happen? Any suggestions on changing out the cabinet without getting new key codes? This is a nursing home so having the system down for any length of is not good. Thanks