#osn3500

I want to share some information about configuring 10G services in differenet forms in DWDM network.

1.What are the differences between 10GE LAN and 10GE WAN services

According to IEEE 802.3ae,  compared with 10GE LAN services,10GE WAN services involve an additional   process in which signals are encapsulated into standard SDH/SONET frames. In other words, 10GE WAN services are processed in a similar way as how STM-64 services are processed in a   WDM/OTN system.The most direct difference between 10GE LAN and 10GE WAN services is that they have different signal rates.

2.How do we configure 10GE LAN and 10GE WAN services?

Let's take a look at the steps for configuring 10GE WAN services.

3 - About the 10G LAN there are 2 types of  port mapping ((bit transparent mapping and MAC transparent mapping))

What is the difference between bit transparent mapping and MAC transparent mapping?

In bit transparent mapping (11.1G) mode, the OTU frame frequency is increased to ensure the encoding gain and error correction capability of the FEC function.Therefore, the service rate is OTU2e,which is higher than OTU2. This mapping mode is recommended for interconnection between Huawei devices.

In MAC transparent mapping (10.7G) mode, the GFP-F encapsulation mode is used to map 10GE MAC frames into OTU2 signals.

This mapping mode provides a standard service rate and therefore facilitates interconnection between Huawei devices and peer devices.

Networking Diagram

The network diagrams of using OptiX OSN equipment to transparently transmit video services are almost the same. The main difference lies in the configurations of board slots and certain parameters.

Unidirectional Video ServiceIn this example, the OptiX OSN 3500 transparently transmits serial digital interface (SDI) services.

Figure 1 shows the network diagram.

User A corresponds to the television program source; User A1, User A2, and User A3 correspond to local broadcast sites.

The signals from User A are unidirectionally broadcast to User A1, User A2, and User A3 through NE1, NE2, NE3, and NE4.

Bidirectional Video ServiceIn this example, the OptiX OSN 3500 transparently transmits SDI services.

Figure 2 shows the network diagram.

User B corresponds to the television program source; User B1 corresponds to the local broadcast sites.

The signals from User B are transparently transmitted to User B1 through NE1 and NE2.

User B and User B1 interact with each other by sending bidirectional services.

Networking Diagram

NE1 is configured with the monitoring host. NE2, NE3, and NE4 are configured with the environment monitors. Communication between the monitoring host and the environment monitors is required.

As shown in Figure 1, the service requirements are as follows:

NE1 is configured with the monitoring host. NE2, NE3, and NE4 are configured with the environment monitors.

The monitoring host functions as the master station, controls the data reporting from NE2, NE3, and NE4, and broadcasts commands to the environment monitors of NE2, NE3, and NE4.

The environment monitors of NE2, NE3, and NE4 function as the slave stations, collect data, and report the data to the monitoring host.

NOTE:

The OptiX OSN equipment, like Huawei OSN3500 / OSN7500 supports in-service detection of optical power and provides he automatic laser shutdown (ALS) function.

ALS Function

The OptiX OSN equipment, like Huawei OSN3500 / OSN7500, provides the automatic laser shutdown (ALS) function for the SDH optical interfaces.

When a fiber that connects two optical interfaces is cut, an R-LOS alarm is generated at the optical interface of the local end. If the R_LOS alarm lasts for 500 ms, the laser of the transmit optical interface at the local end is automatically shut down. By default, the laser pulse is generated at a 60-second interval and lasts for 2s every time.

After the fiber connection is restored, the optical interface at the opposite end detects the laser pulse generated from the local end. The laser of the optical interface at the opposite end then continuously launches laser beams. After receiving the laser beams launched by the opposite end, the laser of the local end then also continuously launches the laser beams. As a result, the two optical interfaces can communicate with each other and the R-LOS alarm is cleared.

The automatic laser shutdown (ALS) function complies with ITU-T G.664.

Optical Power Management

The OptiX OSN equipment supports in-service detection of the optical power of SDH optical interfaces and Ethernet optical interfaces.

The OptiX OSN equipment provides the function to query the parameters of the optical module. The parameters that can be queried include the optical interface type, fiber mode (single-mode or multi-mode), transmission distance, transmission rate, and wavelength.

The optical interface board uses the pluggable optical module. Users can choose single-mode or multi-mode optical modules according to the requirement, which facilitates the maintenance.

The optical power threshold of the boards can be queried.

The OptiX OSN 3500 supports hybrid networking with the RTN equipment, therefore implementing end-to-end management.

As shown in Figure 1, hybrid networking allows more flexible reform of the existing network and optimal utilization of the network resources.

In the preceding typical networking, the OptiX OSN 1500 or OptiX RTN equipment is used at the access layer.

The OptiX OSN 3500/7500 is often used at the convergence/backbone layer.

See Figure 1. In packet domain, the equipment at the access layer, such as the OptiX OSN 1500 or the OptiX RTN equipment, accesses the FE services from the NodeB, and transmits the FE services to the GE packet ring, then to the 10GE convergence/backbone ring, and finally to the RNC. In this manner, the FE services from the base stations are transmitted to the RNC in an end-to-end manner.

See Figure 1. In TDM domain, the equipment at the access layer, such as the OptiX OSN 1500 accesses the E1 services from the BTS to the STM-1/STM-4 ring consisting of the MSTP equipment and then transmits the service to the STM-16/STM-64 ring consisting of the OptiX OSN equipment (convergence/backbone layer) and finally to the BSC. In this manner, the E1 services from the BTS are transmitted to the BSC in an end-to-end manner.

The OptiX OSN 3500 supports hybrid networking with the PTN equipment, therefore implementing end-to-end management.

As shown in Figure 1, the hybrid networking allows more flexible reform of the existing network and optimal utilization of the network resources.

In the preceding typical networking, the OptiX OSN 1500 or OptiX OSN 500/550 or the OptiX PTN 910/950/1900 is used at the access layer.

At the backbone/convergence layer, the OptiX OSN 3500/7500 or the OptiX PTN 3900 is used.

See Figure 1. In packet domain, the equipment at the access layer, such as the OptiX OSN 1500 or the OptiX PTN equipment, accesses the FE services from the 3G base stations, and transmits the FE services to the GE packet ring, then to the 10GE convergence/backbone ring, and finally to the RNC. In this manner, the FE services from the base stations are transmitted to the RNC in an end-to-end manner.

See Figure 1. In TDM domain, the equipment at the access layer, such as the OptiX OSN 1500 or the OptiX OSN 500/550, accesses the E1 services from the BTS to the STM-1/STM-4 ring consisting of the MSTP equipment and then transmits the service to the STM-16/STM-64 ring consisting of the OptiX OSN equipment (convergence/backbone layer) and finally to the BSC. In this manner, the E1 services from the BTS are transmitted to the BSC in an end-to-end manner.

The OptiX OSN equipment can use the EoS service dividing board to directly access Ethernet services through the TDM ring at the access layer. Figure 2 shows how this function is realized.

As the packet service increases, the EoS service dividing board provides a solution for the expansion of the SDH network and improves the utilization of the equipment at the access layer.

In the preceding typical networking diagram, the OptiX OSN 1500 or the OptiX OSN 500/550 is generally used at the access layer, and the OptiX OSN 3500/7500/7500 II is generally used at the convergence/core layer.

As shown in Figure 2, only the TDM domain is available at the STM-1/STM-4 access layer. The OptiX OSN 1500 transmits the E1 and FE services that are accessed by the base station to the OptiX OSN 3500/7500/7500 II.

The OptiX OSN 3500/3500T supports one extended subrack at most. The extended subrack should be the OptiX OSN 3500/3500T.

Table 1 lists the configuration requirements for extended subracks.

Table 1 Configuration requirements for extended subracks

The N1UXCSB of the main subrack and the N1XCE of the extended subrack are connected by the two cables on the extended subrack. In this way, the 1+1 protection is achieved. The EXT interface of the N1AUX on the main subrack connects with the EXT interface of the N1AUX on the extended subrack to exchange management information. Figure 3 shows the connection of a main subrack and an extended subrack. In the case that the N1SXCSB is used, the method of cable connection is the same. You can simply replace the N1SXCSB with the N1UXCSB in Figure 3

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