HPE JG438A: Optical POS interface module for MSR routers—1 × OC-3c/STM-1c (155.52 Mbps), supports PPP/Frame Relay/HDLC over SONET/SDH, factory-new with warranty.
HPE JG438A – MSR 1-Port OC-3c/STM-1c POS HMIM Module
chicomputersupply 09/06/2025 Computers
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https://www.chicagocomputersupply.com/products/jg438a