Telecommunications network

Tender description

Iarnród Éireann currently operates a legacy transmission network using now obsolete Ericsson Synchronous Digital Hierarchy (SDH) technology and Nokia Plesiochronous Digital Hierarchy (PDH) technology. The transmission equipment runs over 2 000 km of optical fibre network with copper links to many end-point locations. This SDH/PDH network, which primarily carries operational traffic (i.e. signalling control, safety critical voice communications, level crossing control and video images, OCS control systems) is facing obsolescence in the near term and IE is therefore planning for: — the replacement of the current SDH/PDH network with modern, future-proof and fit-for-purpose transmission network equipment, — the seamless and efficient transition and migration of services from the current SDH/PDH network to the new replacement network. Iarnród Éireann currently operates a legacy transmission network using now obsolete Ericsson Synchronous Digital Hierarchy (SDH) technology and Nokia Plesiochronous Digital Hierarchy (PDH) technology. The transmission equipment runs over 2 000 km of optical fibre network with copper links to many end-point locations. This SDH/PDH network, which primarily carries operational traffic (i.e. signalling control, safety critical voice communications, level crossing control and video images, OCS control systems) is facing obsolescence in the near term and IE is therefore planning for: — the replacement of the current SDH/PDH network with modern, future-proof and fit-for-purpose transmission network equipment, — the seamless and efficient transition and migration of services from the current SDH/PDH network to the new replacement network.