Networking Application. Engineering Requirement. Orderwire and ECC Requirements. Engineering Planning. Networking Diagram, страница 7

The part between NE3 and NE4 needs JBPA for power amplification and JDCU for dispersion compensation. Table 3-13 lists the fiber connection of NE3 and NE4.

Table 3-13 Fiber connection in NE3 and NE4

3.2.5  Network Clock Tracing Diagram

According to the clock requirement, set NE1 as the main clock NE, where BITS is G.811 clock. Suppose the ID of BITS clock is 1, the ID of the internal clock source of NE1, NE2, NE3, NE4, and NE4 is 2, 3, 4, 5 and 6 respectively. Enable the SSM switching protocol. Figure 3-9 shows the setting of clock source level and clock tracing modes.

Normally, NE1 traces the active BITS and the tracing mode of other NEs is shown in Figure 3-9, finally, the network clock comes to a reference-BITS. In the case of fiber-cut, the affected NEs switch their clock sources automatically following SSM, so the network clock still comes to the active BITS. When the active BITS fail, NE1 will trace its internal clock instead following SSM, and at last the network clock can be unified to a reference clock.

Figure 3-9 Engineering information¾network clock tracing diagram

3.2.6  Network Management and ID Allocation Diagram

Figure 3-10 is the ID allocation shown in the engineering networking diagram, where NE1 is the gateway NE. This figure also shows the network management.

Figure 3-10 Network management and ID allocation diagram

3.2.7  Network Orderwire Diagram

The OptiX OSN 9500 provides a line of orderwire phone and two lines of outgoing subnet orderwire phones. Figure 3-11 shows the orderwire phone and conference call in the network. The orderwire phone number has four digits, the first is the subnet number and the rest three digits are user number. The latter two digits are suggested to be the same with the NE ID.

Figure 3-11 Engineering information¾network orderwire diagram