Tenders Are Invited For Communications Network – Upgrade Of Communication Connection And Synchronization Net ... in Croatia (Hrvatska)

Work Detail

Communications Network – Upgrade Of Communication Connection And Synchronization Network. Portable Telecommunication Systems Currently Used By Hops Are Based On Pdh, Sdh And Dwdm Transmission Technologies. Sdh And Dwdm Transmission Systems Are Realized By A Trunk Network Of Optical Fiber Cables, Mostly Optical Fiber Cables In Transmission Line Protective Ropes (Opgw) On Overhead Lines Of Voltage Levels 110 Kv, 220 Kv And 400 Kv. The Network Nodes Of The Hops Access Network Are Located In Electric Power (Ee) Plants And Are Connected To Each Other Via Pdh, Sdh And Dwdm Transmission Telecommunication Systems. The Access Telecommunications (Tk) Network Means Devices In Ee Facilities Connected To The Portable Telecommunications Network. The Current Solution Is Integrated Almost Entirely With Dnwp Connection Master Access Devices. Hops Constantly Reconstructs And Upgrades Connected Systems Such As Primary And Secondary Equipment Of The Power System, Remote Control Systems And Equipment In Ee Plants, Systems For Program Support In Centers, Etc., Which Consequently Necessarily Involves Constant Upgrades, Changes And Extensions Of The Access Network. A Number Of Locations Still Have Flexible Multiplexers (Fmx) Installed. Given Todays Requirements, Fmx Devices Have Limitations. There Is No Monitoring And Management System For Fmx Devices, And They Do Not Support The Requirements For New Digital And Network Interfaces. In Addition To The Above, Fmx Devices Have Been Without The Support Of Equipment Manufacturers For Several Years, Which Results In Difficult Procurement Of Spare Devices And Cards, And It Is No Longer Possible To Contract For Program Maintenance Of The Devices. The Subject Of Procurement Is Planned To Solve The Communication Connection Of Secondary Systems, By Upgrading The Access Communication Network At The Remaining Locations Where Fmx Devices Are Located, Taking Into Account The Existing And Future Requirements Of Network Users As Well As The Existing And Future Configuration Of The Portable Communication Network Used By Hops. This Also Applies To Communication For The Need Of Relay Protection Devices By Introducing The C37.94 Interface And Transmission Of Voice Communication, I.E. Analog Telephone Subscribers, Hops Switching Nodes. In Addition, This Procurement Item Provides For The Possibility Of Purchasing: Upgrading Of Dwdm Transmission Devices For The Realization Of Redundant Connections Of Network Centers (Mc) With The National Dispatch Center (Ndc) And The Reserve National Dispatch Center (Rdc), Devices For The Needs Of Upgrading The Synchronization Access Network Of Hops, Systems For Measuring And Monitoring Fiber Optic Strands Of The Optical Infrastructure, And All Compatible With The Existing Software Package For Monitoring And Managing The Network Of Hops.

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