An adapter for interconnecting a Small Form Factor Pluggable (SFP) transceiver into a receptacle configured to receive a Small Form Factor (SFF) transceiver. The innovative adapter provides an interface for connecting an SFP transceiver to an SFF receptacle (e.g. footprint) on a printed circuit board. This enables manufacturers and customers with printed circuit boards originally designed to receive and interoperate only with SFF transceivers, to replace SFF transceivers with newer SFP transceiver models through the use of the innovative interface described herein.