supply, installation, commissioning & testing of programmable digital drop insert multiplexercomplete with all accessories with power supply as per rdso specification no. irs:tc/68/2012 rev.0 withamendment. 1 including connection cable required for connection to existing proposed sdh equipment. themux shall be wired and equipped for 30 channels with 12 nos. vf 2w/4w e&m circuit, 12 nos. 2w subscriber loopinterface circuit with ringer 02 nos. 2w exchange loop interface circuit & 4 nos. 2w hot line circuit with 100 pairmdf & ipm with three e1 interface and expandable up to five e1 interface facility on multiplexer etc. compatiblewith existing puncom mux link & nms. installation to be done at various stations in cic section of bilaspurdivision, secr. warranty as per irs condition. make :- coral, puncom, webfil. the work is not for newinstallation it is related to replacement in the existing system.