MDA - 7450 ESS 16-PT OC3/12-STM1/4 7450 ESS 16-port SONET/SDH OC-12c/STM-4 c MDA. Each port can operate as OC-12c/OC-3c or STM-4c/STM-1c Accepts up to sixteen (16) SFP OC12-xx or SFP OC3-xx Optics Modules

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