Tender For supply, installation, testing and commisioning of portable 50 lines wll exchange with 50 handset, 8 co line junction card, 1 pri (30 channel) and 4 port gsm card, 4 no's bts, 1 network switch 12 port, 1 coil cat-6 cable (305 meters) one kva ups with one hour backup,brief case. [ warranty period: 12 months after the date of delivery ] ]