replacement of accessories for the existing epabx in gst audit-i, commissionerate office, anna nagar, chennai.-supplying and fixing following modular switch/ socket on the existing modular plate & switch box including connections but excluding modular plate etc. as required. telephone socket outlet supplying and drawing following pair 0.5 mm dia frls/hffr pvc insulated annealed copper conductor, unarmored telephone cable in the existing surface/ recessed steel/ pvc conduit as required. 2 pair 50 pair supplying and fixing of following sizes of medium class pvc conduit along with accessories in surface/recess including cutting the wall and making good the same in case of recessed conduit as required. 40 mm 25 mm supplying and fixing the 400 + 400 pair customized mdf box with powder coating lock and key complete etc as required supplying and fixing the 50 pair customized mdf box with powder coating lock and key complete etc as required supplying and fixing the following pair krone module in the existing box complete with connections etc as required 10 pair dismantling the existing krone box along with removal of existing connections, repunching the 50 pair cables in the new 400+400 pair krone box with necessary cross jumpering connections etc as required including credit for dismantled krone box disconnecting the connections in the existing krone box repunching the same with new 50 pair cable including connections etc as required including credit for dismantled old telephonic cable etc as required.