Difference between the IN/OUT ports and TX/RX ports on an OTU board

12

The IN/OUT port of an OTU board is the WDM-side port for connecting to a MUX/DEMUX board, while the TX/RX port is the client-side port for connecting to access equipment.

Other related questions:
Optical ports of the OTU board
The OTU board provides two groups of optical ports: IN/OUT and Rx/Tx. The IN and OUT ports correspond to WDM-side input and output, and the Rx and Tx ports correspond to SDH-side input and output. The WDM side is also called the line side; the SDH side is also called the client side. In the alarm parameters, 1 indicates the WDM-side transceiver optical port, and 2 indicates the SDH-side transceiver optical port. In some documents, the optical ports of the OTU board are classified into system-side and line-side ports. In the early period, the system side is also called the client side.

Configuration requirements on the cross-connections between the RX/TX ports and LP ports of LOG boards
You can configure cross-connections between all RX/TX ports and LP ports on the NMS only if the ports are not used. When the RX/TX ports need to be used to receive and transmit client-side services, you must pre-configure the cross-connections between the RX/TX ports and LP ports.

Interconnection between LW40 and LU40 (40G OTU boards)
The UFEC modules in the LW40 and LU40 boards are provided by different vendors. As a result, the UFEC algorithms of the two boards are different and therefore the two boards cannot be interconnected. To implement interconnection between LW40 and LU40 boards, disable the UFEC function of the two boards and enable the standard FEC function of the OTN equipment. The FEC error correction capability, however, will be greatly reduced when the standard FEC function of OTN equipment is used.

Description of the optical ports on a transceiver OTU board
Question: A transceiver OTU board provides two groups of optical ports: IN/OUT and Rx/Tx. The IN port inputs WDM-side signals and the OUT port outputs WDM-side signals. The Rx port inputs SDH-side signals and the Tx port outputs SDH-side signals. WDM side is also called line side, and SDH side is also called client side. In alarm parameters, the WDM-side IN/OUT port number is 1, and the SDH-side Rx/Tx port number is 2. In some documents, the optical ports of a transceiver OTU board may be at the system side or line side. What is system side? Answer: System side is the former name of client side. Pay attention to distinguish the names.

Whether services can be provisioned on different wavelengths of OTU boards
The receive end of an OTU board does not detect wavelengths. Therefore, services of various wavelengths can be provisioned on OTU boards. In practice, however, such service provisioning brings difficulties in fiber connecting and maintenance.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top