What is the Optelian 1003-4756?
The Optelian 1003-4756 is a XFP optical transceiver module, listed by the manufacturer as "XFPCWDM IR-2 1491NM SM 40 KM 9.95-11.09GBPS OVERLOAD POWER -2DBM OUTPUT .5DBM TO". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.