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OSN 500 550 580 V100R008C50 Commissioning and Configuration Guide 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).


This section describes the background of introducing scenarios of pulse code modulation (PCM).

PCM devices convert analog signals into digital signals. Currently, PCM devices are separated from SDH devices, which bring about the following problems:

  • A large quantity of devices occupies much space of an equipment room.
  • Network connections are complex.
  • Devices are difficult to uniformly maintain and manage.
Figure 2-19  Solution that PCM devices are separated from SDH devices

To resolve the preceding problems, OptiX OSN equipment provides the embedded PCM solution. Specifically, PCM boards are used on OptiX OSN equipment to provide foreign exchange station (FXS) ports, foreign exchange office (FXO) ports, 2- or 4-wire audio and exchange and multiplex signaling (E&M) ports, sub-rate ports, and Boolean value ports. Using these ports, OptiX OSN equipment can receive low-speed circuit services or Boolean value signals and transparently transmit them on SDH networks. In addition, you can configure and manage services and implement Boolean value remote access on the NMS.

Figure 2-20  Embedded PCM solution

Updated: 2019-01-21

Document ID: EDOC1100020976

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