NEATEL duplex patch leads are manufactured from the highest quality G.652.D optical fibre, terminated with ceramic ferrule connectors of various types. The singlemode are compatible with OS1 & OS2 optical fibre channels. Cable preparation, termination and testing is carried out to strictly managed procedures in an NEATEL approved manufacturing facility. Applications include the connections between optical patching panels and network or server equipment and directly from devices to the local or wide area network or physical security equipment. Each cable has strain relief boots to prolong and maintain performance levels of the assembly, transmit and receive "legs" of each duplex cable are identified by means of ring type cable marker fixed to each end the assembly. A short distance from these identification rings heat shrink is applied to maintain an easy to manage bonded two fibre cable, finally a label containing a unique batch number is fixed to the centre of cable for quality and traceability purposes.