bids are invited for annual maintenance service -data center assets - compute; rack server; oem authorised service provider , annual maintenance service -data center assets - storage & backup devices; enterprise-storage; oem authorised service provider , annual maintenance service -data center assets - network devices; san switch (edge); oem authorised service provider , annual maintenance service -data center assets - network devices; layer-3-core-switch; oem authorised service provider , annual maintenance service -data center assets - network devices; sfp10csr; oem authorised service provider , annual maintenance service -data center assets - network devices; 24 port l2 switches; oem authorised service provider , annual maintenance service -data center assets - network devices; 24 port l2 switches poe; oem authorised service provider , annual maintenance service -data center assets - network devices; l3 switches 48 ports; oem authorised service provider , annual maintenance service -data center assets - network devices; l2 switches poe 48 ports; oem authorised service provider , annual maintenance service -data center assets - network devices; sfp modules; oem authorised service provider , annual maintenance service -data center assets - network devices; stacking module; oem authorised service provider , annual maintenance service -data center assets - network devices; l3 core switches 48 ports; oem authorised service provider , annual maintenance service -data center assets - network devices; small-form-factor- pluggable-transceiver; oem authorised service provider , annual maintenance service -data center assets - storage & backup devices; storage- system; oem authorised service provider