Procurement of Digital Telephone Instruments and Digital Extension Card of Existing System Revision of Version 1 to Version 2 of existing OpenScape Business X8 , Mitel - Unify Openscape CP 405T Digital Phone having 02 line display , Mitel - Unify TDM Licences for 24 line digital card , Mitel - Unify 24 Digial Extension card , MDF with accessiores , Installation and Implemention for above equipment. Total Quantity : 30