Protection requirements

OSN3500 SSN4SLD64 single board has two functional versions N1 and N4,N4SLD64 supports CWDM and DWDM color optical interfaces,N1SLD64 doesn't,N4SLD64 supports single-fiber bidirectional optical modules.
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Huawei SDH Transmission Equipment OSN3500 SSN4SLD64 Technical Parameters Introduction
OSN3500 SSN4SLD64 Appearance

Functions and features of the OSN3500 SSN4SLD64 single board
| Functions and Features | Description |
|---|---|
| Basic Functions | Supports dual optical ports, which can receive and transmit 2-channel STM-64 optical signals, process 2-channel STM-64 standard services or cascade services, and adopts XFP package. |
| Optical Interface Specifications | Supports I-64.1, S-64.2b optical interfaces, optical interface characteristics comply with ITU-T G.691 recommendations. N4SLD64 supports P1L1-2D2 standard optical interfaces. the P1L1-2D2 optical interface characteristics comply with ITU-T G.959 recommendations. N4SLD64 supports CWDM and DWDM color optical interfaces, and the optical interface adopts LC connector. the CWDM optical interface supports 70km transmission distance, and the DWDM optical interface supports 80km transmission distance. N4SLD64 supports single fiber bi-directional optical module. |
| Optical Module Specifications |
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| Business Processing | Support VC-12/VC-3/VC-4 services and VC-4-4c, VC-4-8c, VC-4-16c, VC-4-64c cascade services. |
| Overhead processing |
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| Alarm and Performance | Provides rich alarm and performance events for easy device management and maintenance. |
| REG Specifications | Not supported |
| Protection Mode |
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| Maintenance Features |
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