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The ONS is a traffic concentrator that supports different types of transmission media. It can be used in networks based on fiber and copper media. The TDM portion of the ONS is a cross-connect that can work as a terminal mux, add and drop mux, or non-blocking cross-connect.
The IP portion consists of a L2 switch. The ONS is a small device with a high port density that is designed to be flexible and highly scalable. It is targeted for a number of different applications as shown in this chapter. The ONS owes its flexibility to its modular design.
The ONS consists of a chassis with a motherboard with room for up to eight plug-in modules. Four of the plug-in modules are used as interface modules. The remaining four modules are two redundant power supply modules, one fan module, and a system controller module.
The ONS can be used in star networks, ring networks, chained networks and meshed. This application is typically used for very large end customers or in a building with many smaller end customers. The ONS can be connected towards the backbone network via fiber, radio, or copper.
The ONS can also be used as a traffic concentrator in the point of presence PoP of the operator. The unit may support many different CPEs and may also support different types of transmission media. The unit is the interface between the core network and the access network.
It is also possible to connect equipment from other vendors to the ONS If one ONS does not have enough performance or does not support enough interfaces, it is possible to stack a number of ONS nodes to create larger systems. Typically an internal ONS is used to groom traffic from several ONS s that are connected to the access network.
The internal ONS is connected to the core network. The fan unit is a plug-in device consisting of a circuit board with four fans. The air is sucked in via four circular openings in the left sidewall and emerges via holes in the right side cabinet wall.
Four fans are used to improve reliability. The fan unit consists of four fans. These act as the main and standby fans. The "main" and "stand-by" designations are swapped every 24 hours to evenly distribute wear on the fans. In case of an abnormal temperature rise, all fans will operate simultaneously.
The fans operate in pairs; there are two standby fans and two main fans. The maximum temperature measured in the ONS controls the fans. The only modules not containing temperature sensing are the fan unit itself, the power modules, and the system controller card.
The FAN module is connected to the main card through the backplane. The alarm, specific for each fan, is processed and presented as a Fan Failure Alarm.
The ONS provides facilities to report four auxiliary alarm inputs for associated equipment, for example power module failure, a battery condition, or an open cabinet door. It also supports two alarm outputs used to signal equipment alarms and traffic related alarms.
The main feature of the power module is to convert and isolate primary power, 48 VDC, to 5,25 volts for the modules in the product. The secondary current is short circuit proof and the average s.
The maximum secondary current is limited to ab. A 3m long power cable is also provided with a Mini-fit connector in one end and no connector in the other end.
This cable connects the ONS to the internal 48V power-rails inside the rack. The cable and the power supply meet the safety requirements of the EN specification. The amount of memory can be configured at the factory from 64 MB to MB. The software is stored in Flash memory devices. The 32 MB CompactFlash is mounted in a connector on the system controller. The module contains the local synchronization interface for the ONS This interface is directly connected to the SETS functionality on the motherboard.
The interface supports a framed E1 interface. It is possible to select different overhead bytes from all SDH interfaces to the 30 available time slots. The fifth LED indicates the status of the management port. The interface is running at a data rate of The synchronization port is used for SETS functionality on the main card. The proprietary protection interface will be used for equipment protection in a future release.
The power consumption should not exceed 23W. The module is equipped with a reset circuit that resets the card in case of a fault in one of the voltages. Note The reset switch that is accessible in front of the system controller module will reset the ONS A special tool such as a small screwdriver or a pencil may be used to activate the switch. A fifth, green LED is also mounted in the front of the system controller card. This LED indicates the link status of the management port.
The ONS consists of a unit with a main card with space for up to four plug-in service modules. The plug-in modules support a number of different external interfaces and different transmission medias. The internal interface with the main card is identical for all service modules. The FPGA configuration is automatically loaded from the active flash bank after power-up. New FPGA files can be downloaded from the management system. The flash bank selection is controlled by the management system.
The modules are connected to the main card via a bit wide time multiplexed address and data bus. The DXC devices on the main card are responsible for generating module chip select and the translation from a time multiplexed bus towards the modules to a separate data and address bus towards the processor. All modules with IP switching capability are interconnected with a high-speed link to a central switch on the main board.
The link is called G-link. The mapping of IP traffic into VC12 containers is performed at service module level. All modules with IP switching capability are interconnected with a high-speed link to a central switch on the main' card. All modules with TDM functionality are connected to the cross-connect on the main board. Skip to content Skip to footer. Book Contents Book Contents. Find Matches in This Book. PDF - Complete Book 1. Updated: October 31, Chapter: Product Overview.
Chapter Contents 2. The module has features that allow power sharing and hot plugging. The physical connectors of the five interfaces are of the RJ type. Power consumption for the system controller module is 23 W maximum.
Link All modules with IP switching capability are interconnected with a high-speed link to a central switch on the main board. Was this Document Helpful? Yes No Feedback. Related Cisco Community Discussions. Indicates that power is present and the unit is operating correctly. Indicate that an error is present with the equipment. Indicates that a traffic alarm is present at one of the interfaces.
Indicate that test-loops are activated on the unit.
Cisco ONS 15305 Multiservice Provisioning Platform for SDH Access Networks
Note The instructions in this section primarily address the installation of the ONS , and modules supplied by Cisco Systems. When installing racks, electrical wiring, raceways, and other equipment not covered in this manual, you should follow all local, state, federal, or international if applicable codes and regulations. You should be thoroughly familiar with the instructions in this manual before starting any work. Use the following sequence when installing the ONS
Cisco ONS 15305 8-Port 10/100 Ethernet Module
The product is typically used for high-bandwidth service delivery to medium-sized and large businesses, and for traffic aggregation at small central offices. Product Overview. Figure 1. Multiservice Delivery. Figure 2. Multiservice Aggregation. Figure 3.