MDA - 7450 ESS 8-PT OC3/12-STM1/4 7450 ESS 8-port SONET/SDH OC-12c/STM-4c MDA. Each port can operate as OC-12c/OC-3c or STM-4c/STM-1c Accepts up to eight (8) SFP OC12-xx or SFP OC3-xx Optics Modules

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