what is GPON OMCI?

OMCI (Optical Network Unit Management Control Interface, ONU Management and Control Interface) is a protocol for information exchange between the OLT and ONT defined in the GPON standard. It is used for the management of ONTs by the OLT in the GPON network:

  • Configuration management,
  • Fault management,
  • Performance management,
  • Security management.

OMCI is mainly a master-slave stop management protocol, where the OLT is the master device and the ONT is the slave device. The basic process is that the OLT sends a management message and waits for an ONT response. After receiving the response or timeout, it continues to issue the next message.OMCI allows service providers to create a variety of applications and services utilizing the PON (Passive Optical Network), including voice, video and data, and features inherent flexibility.

The OMCI protocol is at the high-level control level of the GPON system, and refers to the high-level service configuration and performance management. ITU-TG.984.4 protocol defines the application scope and application mode of OMCI protocol in GPON system. In the GEM mode, each OMCI message is encapsulated in a GEM frame. The OMC1 message consists of 53 bytes. The message content is: GEM lock, transaction-related identifier, message type, device identifier, message identifier, Message content and CRC trailer field.
BAUDCOM GPON ONU all can support OMCI protocol.


Post time: 2020-01-06

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I needed those to connect my PC on the third floor to have internet access in that room, and ISP installed their modem on the first floor only. After dropping fiber patch cables, plugged in all cables into these media converters at both sides, and link came up instantly. Was much easier than I thought!

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Great experience – units worked straight out of the box – just needed plug in cables and we were done. I also like the possibility to enable jumbo frames, while we do not have a need for this feature at the current moment it’s great to have this option.

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