Nortel NT0H53CA (telecommunications transmission and networking portfolio) Telecom System Card / Module

The Nortel NT0H53CA is an OPTera Metro 5200 Power Converter card with integrated shelf-level timing (ISLT), part of the NT0H-prefixed circuit-pack family used across Nortel’s OPTera Metro / Optical Metro 5100 and 5200 DWDM transport shelves. The OM 5200 chassis distributes -48V DC to its sixteen traffic slots and its control cards from a small number of power-converter positions, and a card carrying integrated shelf timing also distributes the reference clock the shelf’s optical and framer circuits lock to. Because power and timing cards are shelf-specific rather than universal, the exact revision is worth confirming against your chassis before ordering. OPTera Metro shelves remain in service across a number of established metro optical transport networks, and genuine spares such as this one are a routine requirement for maintaining full shelf redundancy. Tech-Star (UK-based, shipped worldwide) stocks Nortel OPTera Metro cards to support ongoing network maintenance. Please contact our sales team to confirm exact compatibility and for current stock and pricing.