Marconi/Nokia 1HAK10697AAQ Nokia Synfonet / Marconi SDH transmission Optical Transmission Module

The Marconi/Nokia 1HAK10697AAQ is a plug-in card from Marconi’s SDH transmission range, a DSSS double DLT 120 ohm EMC card. The 1HAK prefix is Marconi Communications’ own part-number series, used across its SMA and OMS synchronous multiplexer families, which is why a card of this era is identified by the full code rather than by its description. The 120 ohm figure is the one that matters for planning: it is the balanced twisted-pair impedance ITU-T G.703 specifies for 2Mbit/s connections, as against the 75 ohm unbalanced coaxial alternative, and the two will not interconnect without adaptation. Double indicates two interface groups on the one card. DSSS and DLT are internal designations rather than published product names. Marconi absorbed Nokia’s Synfonet SDH business in 1999 and its own transmission portfolio passed to Ericsson in 2006, which is why cards of this generation turn up under more than one badge. Networks of this era are maintained rather than replaced on utility, transport and private rings, so spares stay in demand. Tell us the subrack and release you are matching and we will verify the card against it first. Tech-Star (UK-based, shipped worldwide) stocks components to support ongoing network maintenance projects. Please contact our sales team for current stock and pricing.