Print blocked analogue extension devices with-
BLFDP:TYPE=EL;
You can deblock any extensions showing with-
BLDBE:EQU-xx-xx-xx-xx,ALLFM=Y;
If all extensions on a board are out of service, you can try restarting the board with-
RFBOI:BPOS=xx-xx-xx;
You can deblock a board with-
BLDBE:BPOS=xx-xx-xx, ALLFM=Y;
In all cases above replace xx with the relevant digits.