Corrigendum - Supply, Installation, Testing And Commissioning Of Designed Based Public Address System At Various Airports With Three Year Onsite Warranty And Three Years Comprehensive Annual Maintenance Contract, With Spares., Supply Of Ip Based Public Address Sound Management System With Dedicated Hot Standby ( 1+1 ) Network Controller , Digital Audio And Control For Simultaneous Multi Audio Channel , Pre-Recorded Or Manual Announcement Broadcast , Built In Supervision And Monitoring For Amplifier And Microphone Station , Alarm Input And Output For Interfacing With Existing External Fire Alarm , Cctv , Access Control Or Other Alarm Input , System Shall Have Support For Multi-Channel Digital Audio Inputs From Call Station , Multi-Level Of Priority , Support Several Type Chime / Tones / Emergency Tones , The Systems Should Allow Pc Based Controlling To The Network Controller And Programming . The Systems Shall Have Open Interface For Interfacing Other Services Such As Fire And Fid With Building Integrated Service Software And Poe Enabled L-2 Switch If Required . The Text To Speech Hardware For Making Announcements In Different Languages Should Also Be Included , Supply Of Pc Control Gui Software Along With Desktop Pc Of Intel Core I7 , 8Gb Ram , 500 Gb Hdd , Dvd Rw , 19 Led , Mouse , Keyboard Or Higher Configuration For Complete Administration Of Pa System , Programming And Monitoring Of Controller , Amplifiers , Call Station , Zone Setting , Priority Etc . . , Supply Of Rack-Mountable Hard Disk / Pc ( As Per Specifications ) Based Music Player Capable Of Playback Of Common Digital Media Like Mp3 / Mp4 / Wma / Avi / Wmv / Divx Etc . , With Minimum 500Gb Hard Disk , With Full , Supply Of Equipment Rack For Housing Central Controller , Amplifiers And Music Source , Consisting Of Mains Panel As Per Specifications . , Supply Of Digital Call Stations With High Quality Condenser Microphone On Gooseneck , Keypad For Min . 12 Zone Selection , Relay Of Pre-Recorded Messages / Alarm Messages / Tones / Call Routines , Upgradable To Any Number Of Zone Selection By Adding Keypad Etc . With Suitable Console Table As Per Specifications . , Supply Of Digital Call Stations With High Quality Condenser Microphone On Gooseneck , With Press To Talk Switch And Local Announcement Only , With Announcement Booth , Digital Car Call Console With Wall Mounted Housing And Flush Mounted Microphone For Car Call Announcement . , Supply Of Power Amplifier , Minimum Duel Channel , 2X240 W / 1X500 W , Class D Amplification With Built In Dsp With Min . 2 Channel Avc ( Automatic Volume Control ) Per Amplifier , Automatic Changeover To Standby Amplifier In Case Of Failure , Front Lcd / Led Display For Status / Error Display , Headphone Socket For Audio Monitoring . , 100 V Outputs , Digital Audio Inputs Via Cat / Fibre Cable ( For Interconnection And Looping Between Amplifiers ) , Supply Of Ceiling / Box / Column / Active / Passive Array Or Any Other Speakers For Zone 1: Departure Concourse And City Side Curb Area , To Meet The Target Parameters Such As Spl , Sti , Frequency Response , D / R Ratio Etc . , Supply Of Ceiling / Box / Column / Active / Passive Array Or Any Other Speakers For Zone 2: Check-In , Pre Security , To Meet The Target Parameters Such As Spl , Sti , Frequency Response , D / R Ratio Etc . , Supply Of Ceiling / Box / Column / Active / Passive Array Or Any Other Speakers For Zone 3: Bus Lounge , Baggage Make Up Area , Security Hold Area , Child Care Room & Smoking Room With Volume Control Facility To Meet The Target Parameters Such As Spl , Sti , Frequency Response , D / R Ratio Etc . , Supply Of Ceiling / Box / Column / Active / Passive Array Or Any Other Speakers For Zone 4: Departure V . I . P Lounge , Cafeteria , Airport Manager Office , Child-Care Room , M . I . Room , Fire Control Room , Restaurant And Offices , With Volume Control Facility To Meet The Target Parameters Such As Spl , Sti , Frequency Response , D / R Ratio Etc . , Supply Of Ceiling / Box / Column / Active / Passive Array Or Any Other Speakers For Zone 5: Arrival Passenger Concourse , V . I . P . Lounge , City Side Curb Area , Baggage Break Down , Baggage Claim Area & Offices Etc . To Meet The Target Parameters Such As Spl , Sti , Frequency Response , D / R Ratio Etc . Volume Control Facility To Be Provided At V . I . P . Lounge & Offices . , Supply Of Weather Proof Metallic / Horn Or Any Other Speakers For Zone 6: Car Calling / Parking Area , As Per The Specifications , Supply Of Omni Direction Noise Sensing Microphone In Suitable Housing As Per Design Requirement And Specifications . , Supply Of Redundant ( 1+1 ) 10 Kva Online Ups With Smf Batteries , 30 Minutes Of Battery Backup With Each Ups . , Supply And Laying Of 1 . 5 Sq . Mm . Multistrand Pvc Sheathed Two Core Twin Twisted Speaker Cable In Existing Conduit / Floor Channel As Per Specifications . , Supply And Laying Of Pvc Sheathed 0 . 75 Sq . Mm . Multistrand Two Core Shielded Microphone Cable In Existing Conduits / Floor Channel As Per Specifications . , Supply And Laying Of Fibre Optic Network Cable With Connectors And Splicing Etc . As Per Specifications . , Supply And Laying Of Armoured 0 . 75 Sq . Mm . Multistrand , Two Pair Twin Twisted Speaker Cable For Laying On Wall / Underground Laying In Existing Hdpe Pipe / Hume Pipe / Gi Conduit As Per Specifications . , Supply And Laying Of Utp Cat 6 Data Cable In Existing Conduit / Pipe On Surface / Recess / Concealed , With Connectors , Termination Etc . Required As Per Specifications , Supply And Laying Of 3 Core 1 . 5 Sq Mm Pvc Insulated Pvc Sheathed Copper Conductor Power Cable In Existing Conduit / Pipe On Surface / Recess / Concealed Including Termination Etc . Required As Per Specifications , Supply And Laying Of 25 Mm Dia , 16Swg M . S Conduit ( Isi Mark ) With All Bends , Tees And Other Accessories As Required And As Per Specifications , Supply And Laying Of 80 Mm Dia Gi Pipe ( Class B ) With All Accessories On Surface / Recess / Concealed As Per Specifications And Preferred Makes . , Complete Supply & Installation Of 6 Metres . Gi Pole ( Class B ) Of 65 Mm Dia For Mounting Of Car Call Horn Speakers Including All Accessories As Per Specifications . , Excavation In Soft / Hard Soil With The Required Depth Up To 75 Cm &Backfilling , As Per Specifications , Road Cutting With The Required Depth Up To 40 Cm & Backfilling As Per Specifications , Training & Documentation Charges As Per Details In The Tender Document At Each Site . , Installation , Integration , Testing And Commissioning Of The Complete Public Address ( Pa ) System For Airports With Required Accessories Including Configuration Of Entire System , As Per Specifications .