supply of supply of managed sdh (stm-1 add/drop mux and upgradeable to stm-4). , supply of managed sdh (stm-1 add/drop mux and upgradeable to stm-4) fully wired for 2 x 63 mb and equipped for 21e1s and with stm1 (s1.1) aggregate interface including power supply, order wir e, ethernet card, sub rack, inbuilt ddf, installation material and all other accessories, manuals etc. as per tec. specification tec/gr/tx/sdh-004/04.jan.2011 or with latest amendment. the contractor will supply al l other accessories as mentioned in the above said tec specifications and system will have provision of diff erent redundancy cards as per the tec specifications note: it shall be possible to increase capacity from 2 1e1 to 63 e1s by adding / inserting tributary cards. this includes connecting all pig tails, optical patch cord s etc. to the sdh equipment. this also includes connecting the sdh equipment with all cards to the 48v bu s including supply of wires and connectors. termination of all e1s on ddf taking pvc cable over runway or a wall. offered equipment should match with existing system of make: tejas. make: tejas or similar. [ war ranty period: 30 months after the date of delivery ] ]