Compact small form-factor pluggable CSFP transceiver and a compact small form-factor CSFF transceiver supports network systems, especially those deploying single-fiber bidirectional transceivers in high density applications.The dual-channel CSFP has the same mechanical dimensions as the industry-standard SFP transceiver and is compatible with the standard SFP cage. The single-channel CSFP and CSFF are half the size of the industry-standard SFP and SFF packages. The CSFP design is modular to enable configurations of integrated 2ch modules. CSFP optical transceiver modules are designed for Fast Ethernet, Gigabit Ethernet, 1G/2G Fibre Channel, and SDH STM-1/8/16 links over Single-Mode Fiber (SMF).