The NORTEL NTFW03DB 01 is a telecom circuit pack (line/interface card) used in Nortel optical transmission systems. Verified supplier data identifies it as a:
“PCP, STM1E Tributary” (STM-1 Electrical Tributary card)
This means the card is designed to handle STM-1 (155 Mbps) electrical signals, acting as a tributary interface within a larger SDH (Synchronous Digital Hierarchy) system.
It is typically used in Nortel transport platforms (e.g., Optera / Passport / SDH nodes) to interface lower-speed electrical signals into higher-capacity optical networks.
Key Features
- Manufacturer: Nortel Networks
- Part Number: NTFW03DB (revision 01)
- Product Type: Telecom Tributary Interface Card
- Function: STM-1 electrical signal interface
- Technology: SDH (Synchronous Digital Hierarchy)
- Form Factor: Plug-in circuit pack
Technical Specifications
- Interface Type: STM-1 (155 Mbps) electrical (STM-1e)
- Function: Tributary mapping into SDH transport system
- Role:
- Connects lower-capacity signals to SDH backbone
- Provides electrical interface before optical conversion
- Installation: Slot-based telecom chassis
- Deployment: Carrier-grade telecom systems
- Works as a “tributary card” → feeds signals into higher-level multiplexing
- Common in:
- SDH multiplexers
- Optical transport nodes
- Typically paired with:
- Optical line cards (STM-16 / STM-64)
- Cross-connect systems
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