Finisar FTLF1323P1BTR OC-3 SR-1/STM I-1 or OC-3 IR-1/STM S-1.1 SFP Optical Transceiver 5 1

FTLF1323P1BTR

Picked these up for some legacy Sonet maintenance. They handle both SR and IR modes perfectly. Reliable optics, good power levels on the Rx. No complaints.

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