| ULSWB8HT25 | 8" SPEAKER WITH 25V TRANSFRMER |
| UM1004BR | FLUSH HANDST ADAPTOR KIT-BROWN USE WITH ANY HT2000 SERIES S.T.R. HANDSETS |
| UM1004GR | FLUSH HANDST ADAPTOR KIT--GREY USE WITH ANY HT2000 SERIES S.T.R. HANDSETS |
| UM1004IV | FLUSH HANDST ADAPTOR KIT-IVORY USE WITH ANY HT2000 SERIES S.T.R. HANDSETS |
| UM1004WH | FLUSH HANDST ADAPTOR KIT-WHITE USE WITH ANY HT2000 SERIES S.T.R. HANDSETS |
| UM3004A | FLUSH HANDST ADAPTOR KIT-ANTHR USE WITH ANY HT3000 SERIES ANTHRACITE S.T.R. HANDSETS |
| UM3004T | FLUSH HANDST ADAPTOR KIT-TITAN USE WITH ANY HT3000 SERIES TITANIUM S.T.R. HANDSETS |
| UM3004W | FLUSH HANDST ADAPTOR KIT-WHITE USE WITH ANY HT3000 SERIES WHITE S.T.R. HANDSETS |
| UMF1000 | FLUSH HOUSING FOR FS1000 /1500 USED WITH THE FS1000 AND/OR FS1500 SERIES STATIONS TO MOUNT THEM FLUSH INTO THE WALL |
| UMV1000 | FLUSH HOUSING FOR VFS1000 MON. USED WITH THE VFS1000 AND/OR VFS1500 SERIES MONITORS TO MOUNT THEM FLUSH INTO THE WALL |
| UPG1 | 1 MODULE/1 WIDE FLUSH BACK BOX REQUIRES MT1 SERIES FRAME |
| UPG2 | 2 MODULE/1 WIDE FLUSH BACK BOX REQUIRES MT2 SERIES FRAME |
| UPG3 | 3 MODULE/1 WIDE FLUSH BACK BOX REQUIRES MT3 SERIES FRAME |
| UPG4 | 4 MODULE/1 WIDE FLUSH BACK BOX REQUIRES MT4 SERIES FRAME |
| UPG4/2 | 4 MODULE/2 WIDE FLUSH BACK BOX REQUIRES MT4/2 SERIES FRAME |
| UPG6/2 | 6 MODULE/2 WIDE FLUSH BACK BOX REQUIRES MT6/2 SERIES FRAME |
| UPG8/2 | 8 MODULE/2 WIDE FLUSH BACK BOX REQUIRES MT8/2 SERIES FRAME |
| US051 | AUTH REPLACEMENT PUSH BUTTON |
| USB56KEM | 56KBPS EXTERNAL USB MODEM UNIT 56KBPS DATA ITU-T V.92 1 X RJ-11 PHONELINE 1 X 4-PIN TYPE A USB |
| USGH633 | PAGING INTERFACE RELAY--PRO700 REQUIRES A PRO700 MASTER STATION FOR STATION ADDRESS ASSIGNMENT. |
| USGH932 | RING CUT-OFF RELAY ASSEMBLY |
| USGH933 | RING MULTI-PURP RELAY ASSEMBLY DOES NOT REQUIRE A MASTER STATION FOR STATION ADDRESS ASSIGNMENT |
| USGH934T | TELEPHONE ACCESS MOD.-901/5000 |
| UVC100-2 | 100 WATT RF POWER AMPLIF.--UHF USED WITH FM2 HEAVY DUTY ANTENNA MOUNTING KIT/BRACKET AND FG4603 ANTENNA |
