Your will get benefits from buying optcore's compatible transceivers:
1. Top Quality: Guaranteed Product Quality & a 3-Year Advanced Replacement Warranty
2. Available: Short Lead Time to 1 business day
3. Extensive Cost Savings: Up to 90% below list price for the main brands
4. Compatibility: 100% Compatible With Cisco
5. Service: High-grade Service and Technical Support

Features
Hot Pluggable
Low power consumption
Compliant with MSA Specifications
Cost effective solution, enables higher port densities and greater bandwidth
compatible with Cisco CWDM-GBIC-1490

Specifications
Form Factor: GBIC
Device Type: Transceiver module
Interface (Bus) Type: Plug-in module
Application: 1.25GBASE-CWDM Gigabit Ethernet and 1 Gb Fibre Channel
Data Transfer Rate: 1.25Gbps
Wavelength: 1490nm
Max Distance: 80km
Fiber Type: SMF
Connector: Duplex SC
Operating Temperature: 0~70C

We supply a series of fiber optic transceivers including SFP transceiver, CWDM SFP Transceiver, DWDM SFP Transceiver, Video SMPTE SFP Transeiver, Bidirectional SFP Transceiver, GBIC transceiver,CWDM GBIC Transceiver,10GBASE XENPAK  transceiver,CWDM XENPAK transceiver, DWDM XENPAK transceiver,  X2 transceiver, CWDM X2 transceiver, DWDM X2 transceiver, EPON and GPON, SFF  transceiver, 10GBASE SFP PLUS transceiver, Bidi SFP+ transeiceiver, 10GBASE XFP transceiver, CWDM XFP transceiver, DWDM XFP transceiver and so on.