{"activeVersionTag":"latest","latestAvailableVersionTag":"latest","collection":{"info":{"_postman_id":"7ee2b1f6-257a-4284-9eb9-0ab02b61c409","name":"Harmonic SeaStar","description":"Harmonic’s **SeaStar Optical Node** is a compact, fiber‑forward RPD solution that delivers multigigabit broadband to low-density MDUs without rewiring.\n\n<img src=\"https://content.pstmn.io/1858c58f-045d-4a3b-ba33-9537c1797c68/aW1hZ2UucG5n\" alt=\"SeaStar%20RPD\" height=\"400\" width=\"400\">\n\nEngineered for rapid deployments and integrated into the Harmonic cOS platform, SeaStar enables operators to grow broadband services efficiently, reliably, and cost-effectively—up to 16 buildings and 32 subscriber units per node.\n\n<img src=\"https://content.pstmn.io/148cb0cb-869b-4347-8dcf-13d598b531e8/aW1hZ2UucG5n\" alt=\"Harmonic%20SeaStar%20RPD\" width=\"548\" height=\"410\">\n\nKeys for Providers\n\n| Feature | Benefit |\n| --- | --- |\n| Up to 16 MDUs support | Efficiently reach multiple small buildings per node |\n| Coax support to end units | Avoid in-building rewiring and simplify upgrades |\n| Hardened design | Suitable for diverse environments: indoor, outdoor, rooftop, pedestal |\n| Integrated into cOS | Unified control with other Harmonic DAA and DOCSIS devices |\n| High-capacity speeds | Enables broadband services that meet next‑gen subscriber expectations |\n\n## Ideal Use Cases\n\n- **Brownfield MDU upgrade campaigns**: Provide fiber-level speeds where retrofitting wiring or permits are cost‑ and time‑prohibitive.\n    \n- **Extend broadband into underserved mid‑density MDUs**: Tap into new revenue with minimal infrastructure changes.\n    \n- **Unified DOCSIS & Fiber migrations**: Transition to DOCSIS 4.0, FDD or FDX, or mix DOCSIS + PON on a unified edge architecture.\n    \n\n## Why Harmonic SeaStar Matters\n\n### 1\\. **Targeted for Low-Density MDU Deployments**\n\nSeaStar is designed to deliver fiber speeds to **up to 16 low-density apartment buildings** within a radius of **\\~5 km**. It can serve up to **32 units per MDU** via existing in‑building coax infrastructure—a perfect fit where running new cabling is not practical.\n\n### 2\\. **Fiber-to-Coax Conversion Simplified**\n\nHarnesses a **Harmonic Pebble Remote PHY Device (RPD)** to convert optical transport into RF at the subscriber premises. This allows existing coax cabling to deliver DOCSIS broadband without major rewiring.\n\n### 3\\. **Compact, Hardened, and Low‑Power**\n\nBuilt for both indoor and outdoor deployment—mounted on walls, poles, strands, or pedestals—SeaStar thrives in rugged environments while keeping power consumption minimal.\n\n### 4\\. **Fiber-Forward with PON Coexistence**\n\nSeaStar supports coexistence with PON (Passive Optical Network) solutions. Operators can optionally attach a **Fin 10G SFP+-based OLT** or external OLT to deploy PON services alongside DOCSIS data.\n\n### 5\\. **Seamless Management with cOS**\n\nFully integrated into Harmonic’s cOS™ broadband platform, SeaStar enables unified management of DOCSIS, fiber, and DAA devices from a single interface—streamlining operations significantly.\n\n### 6\\. **Superior Performance**\n\nProvides **up to 8.5 Gbps downstream** and **1.5 Gbps upstream**, delivering near fiber-like speeds to end users using traditional inside‑coax infrastructure.\n\n### 7\\. **Cost & Time Efficiency**\n\nBy leveraging existing coax wiring, SeaStar avoids status-quo disruptions, cutting both capital and operational expenses. Deployments are faster and less intrusive, maximizing return on infrastructure 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