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UFSBI
Specifications
IRS_ S_104 -2012 UFSBI
Latest specification for BPAC using UFSBI DL-SL 18.08.2025 version 1
Important documents pertaining to UFSBI
Compendium UFSBI 2024
PCCL for Deltron make UFSBI
UFBSI Audit Proposed Format
Double Line Block Instruments
IRS 22_2016_Ver 1_0 DLBI
IRS S 68-89 filter unit for use in conjunction of block instruments in AC areas
RDSO spn_191-2005 DTMF BASED elec block bell and block telephone equpmnt
Single Line Block Instruments
IRS S 98-2001, SINGLE LINE TOKENLESS BLOCK INSTRUMENT HANDLE TYPE