AIR FORCE. T.O.10M1-7-9-1-1 ARMY TM 11-5895-1021-14/1 MARINE CORPS TM 08045-15/1 Table 3-1.  Intercom Directory (Continued) Shelter ID Code IS410 Calling Station ID Code IS411 Calling Station ID Code IS412 Destination Station Pushbutton Destination Station Pushbutton ID Code Number ID Code Number AS402 1 AS402 1 AS401 2 AS402 2 IS421 3 IS421 3 IS422 4 IS422 4 IS431 5 IS431 5 IS432 6 IS432 6 IS412 7 IS411 7 Blank 8 Blank 8 AS301 9 AS301 9 AS302 10 AS302 10 IS311 11 IS311 11 IS312 12 IS312 12 IS321 13 IS321 13 IS322 14 IS322 14 IS331 15 IS331 15 IS332 16 IS332 16 Shelter ID Code IS420 Calling Station ID Code IS421 Calling Station ID Code IS422 Destination Station Pushbutton Destination Station Pushbutton ID Code Number ID Code Number AS402 1 AS402 1 AS401 2 AS401 2 IS411 3 IS411 3 IS412 4 IS412 4 IS431 5 IS431 5 IS432 6 IS432 6 IS422 7 IS421 7 Blank 8 Blank 8 AS301 9 AS301 9 AS302 10 AS302 10 IS311 11 IS311 11 IS312 12 IS312 12 IS321 13 IS321 13 IS322 14 IS322 14 IS331 15 IS331 15 IS332 16 IS332 16 Change 1  3-9