supply of integrated multiplexer 1u height, 19 rack mountable, 4*e1 uplink, four service slotsintegrated multiplexer 1u height, 19 rack mountable, 4*e1 uplink, four service slots,supply of integrated multiplexer 1u height, 19 rack mountable, 4*e1 uplink, four service slots. dev ice are populated with 8*em card, 4 fxo&4 fxs combo card, nx64k 4 port ethernet card and two slot empty. device should be capable of supporting in total 32em/40fxo/40fxs/16*fxo+16fxs/ 32rs232/nx64k ethernet ports for future expansion. management supporting telnet as well as nms. potential free contact support. uplin k e1 1+1 protection. should support up to 4 direction. unit should support 2*rs232 ports built-in. unit should sup port dc+dc, dc+ac protection. potential free contact to support. unit supports dc(18-72vdc) as well as ac p ower. model maple/4c/4e1/ ac(v4) with e&m card, fxo fxs combo and ethernet card. acceptable make : mrotek maple 4c v4, team engineer or similar [ warranty period: 30 months after the date of delivery ]