Huawei TNH2SP3DB 42 Port E1/T1 PDH Electrical Interface Board
The Huawei TNH2SP3DB is a high‑performance PDH (Plesiochronous Digital Hierarchy) processing board, providing 42 ports of E1/T1 electrical interfaces. Designed for Huawei’s OptiX OSN series multi‑service optical transmission platforms, this board enables aggregation, transmission, and processing of up to 42 channels of traditional TDM (Time Division Multiplexing) signals.
As a key component in SDH/PDH hybrid networks, the TNH2SP3DB functions as a tributary board, interfacing with legacy telecom equipment—such as PBX (Private Branch Exchange) systems, TDM switches, and base station controllers—to converge low‑speed E1/T1 traffic onto high‑speed SDH/SONET or OTN (Optical Transport Network) backbones.
| Specification | Details |
|---|---|
| Brand | Huawei |
| Model | TNH2SP3DB |
| Board Type | PDH Electrical Interface Board / Tributary Board |
| Impedance | 75‑ohm (balanced/unbalanced), supporting E1 telecommunication systems |
| Number of Ports | 42 ports |
| Data Rate (per port) | 2.048 Mbps (E1) / 1.544 Mbps (T1) |
| Connector Type | 75‑ohm compatibility (standard E1 telecommunications systems) |
| Operating Temperature | –10°C to +55°C |
| Storage Temperature | –20°C to +70°C |
| Relative Humidity | 10% to 90% (non‑condensing) |
| Input Voltage | 3.3V |
| Power Consumption | 5W |
| MTBF | 200,000 hours |
| Cooling | Passive (fan‑less) |
| Installation | Hot‑swappable |
| Indicator LEDs | Status, Activity |
| Compliance | RoHS, CE |
| Supported Protocols | ITU‑T G.703, G.704 |
| Dimensions (W x H x D) | 193.8 mm × 19.8 mm × 205.9 mm (7.6″ × 0.8″ × 8.1″) |
| Weight | 0.85 kg (1.9 lb) |
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Supports 42 concurrent E1/T1 channels on a single board, dramatically optimizing rack space and simplifying cabling in dense deployments.
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As a PDH processing board, the TNH2SP3DB performs add/drop operations on PDH signals—terminating incoming tributary streams and mapping them onto SDH/OTN transport containers for long‑haul transmission.
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Processes VC-12 level path overheads—including J2 and V5 bytes—supporting comprehensive monitoring, maintenance, and alarm generation at the tributary level.
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Provides rich alarm and performance event reporting, enabling proactive fault detection, rapid troubleshooting, and efficient network management.
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Extracts clock signals from channels 1 and 17, serving as optional reference clocks for network synchronization.
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Fully supports physical clock synchronization—essential for SONET/SDH networks where all network elements must synchronize to a primary reference source.
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In‑loop / out‑loop testing at electrical ports for rapid local and remote fault diagnosis
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Warm reset (service‑safe) and cold reset
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Board manufacturing information query
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PRBS (Pseudo‑Random Binary Sequence) test patterns for link integrity validation
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