OSN1500_2500_CXL1_CXL4_CXL16 Single Board Introduction

The basic functions of the single board are as follows: complete 20G VC4non-blocking full crossover; complete5GVC3/VC12non-blocking full crossover; realize flexible service scheduling, including loopback, crossover, multicast, and broadcast; provide the system with standard system synchronous clocks, system frame signals, and overhead clocks; provide the function of selecting the external timing source, and output the timing signals to the outside of the system of2MHzor2Mbits/s; the dual boards work in hot backup; automatically and reliably reverse to the backup board when the working board fails. Dual-board hot backup operation, automatically and reliably switch to the backup board when the working board fails; provide synchronized configuration status information to the system to ensure the reliability of the switch;communicate with other single boardsthrough2 RS485buses andLAN SWITCHbus; providedemultiplexing ofoptical signals (STM-1/4/16) in the receiving end and multiplexing process in the transmitting end; extract and send the overheads from each of the receiving signals to the receiving end. overhead extraction, and selected to the main control module; send end overhead insertion; support for automatic laser shutdown; support for a variety of laser performance parameters of the report; the main control module Functional Description: ProvideF&finterface (RS232); provide10/100MrateEthernetfor connecting to the network management; to provide support forModemaccess to theRS232DCERemote Maintenance Interface (OAM);40-channelDCCprocessing capacity;general/severe alarm function (4-channel cabinet lights); fan monitoring, management functions; provide real-time clock function for the system; provide2-channel485shared bus, used as anMSP,SNCPemergency protection channel, connected to the business interface, backing up each other; provide1-channel10/100M-compatible Ethernet port,connected toSAPboards, used as a management communicationsProvide one 10/100M compatible Ethernet port connected with SAP board for management communication channel to transmit single-board alarm information, performance reporting information, etc.; adopt10MEthernet as the dedicated communication channelbetween master and backup boards; providetwelve16Moverhead lines tocomplete40-channelDCC(D1~D3) processing, and four8M HWoverhead lines to complete thebyte processing ofE1~E2,S1~S4, andF1ports. At the same time also complete theK1,K2and other bytes through the function, to achieve theAPSfunction; monitoring and maintenance of hardware resources;COAmanagement interface, using the single-board debugging serial port;128MSDRAM, can be upgraded to256MB;32MB FLASH, can be upgraded to64MB;1MB NVRAM, can be upgraded to4MB. Note on the battery:the single-board use ofSSQ1CXLis a non-rechargeable battery, can not control the battery.The SSQ1CXL single board uses a non-rechargeable battery, which can not control the power supply of the battery, when the single board is powered on, the battery stops supplying power, and there is no alarm report when the battery is exhausted. II.Applications SSQ1CXL1_CXL4_CXL16runs inOSN1500andOSN2500systems as the system timing and centralized service scheduling board, where the line part also completes the optical signal processing. The single board is located inslots4and5of theOSN1500and inslots9and10ofthe OSN2500subrack.It is shown in the following figure:

Figure 1. OSN1500 Subrack Front View

Figure 1. Front view of OSN2500 subrack

III. Single board interface characteristics and indicators

1 . Line Side Interface

SSQ1CXL1_CXL4_CXL16 single board providesLCoptical interfaces, in whichthe optical modules ofSSQ1CXL1andSSQ1CXL4are under the list of the whole machine (the finished boards ofSSQ1CXL1andSSQ1CXL4don't contain the optical modules), andthe optical modules ofSSQ1CXL1601~04are under the list of the finished boards:

SSQ1CXL1 support optical interface,S-1.1,L-1.1,L-1.2,Le-1.2standard optical module, to realize the needs of different distance transmission;

SSQ1CXL4 supported optical interfaces,S-4.1,L-4.1,L-4.2andLe-4.2standard optical modules, to realize the needs of different distance transmission;

SSQ1CXL16 provides different transceiver modules according to the different requirements of transmission distance, the specific parameters are shown in the following table:

Table 1 SSQ1CXL16 single board configuration and application

Bom Code

Single board type

Corresponding standard

Wavelength

Transmission distance (km)

Emission power (dBm)

Acceptance Sensitivity (dBm)

Minimum overload point (dBm)

03037487

SSQ1CXL1601

I-16(ESFP)

1310nm

2

-10~-3

<-18

-3

03037490

SSQ1CXL1602

S-16.1(ESFP)

1310nm

20

-5~0

<-18

0

03037492

SSQ1CXL1603

L-16.1(ESFP)

1310nm

40

-2~+3

<-27

-9

03037493

SSQ1CXL1604

L-16.2(ESFP)

1550nm

80

-2~+3

<-28

-9

SSQ1CXL1601 :

Mainly used for short distance networking, can also be used for intra-local networking

SSQ1CXL1602 :

Mainly supports short-distance networking; when used forshort distances below 15km ,a5dBfixed attenuatoris required for5-15km;a10dBfixed attenuatorshould be added for0-5km(including those with expansion subracks)to prevent overloading of optical power.

SSQ1CXL1603 :

For short distance networking

SSQ1CXL1604 :

Mainly used for medium and long distance networking; when used forshort distances below 30km , a10dBfixed attenuatoris required.

E1 external clock interface

The system canselect one of thetwo external source ( 2MHz or2Mbit/s) clocks as the clock source for tracking and phase locking, and can also output2MHzor2Mbit/sexternal clock signalsto the outside of the system.Both75Ohm and120Ohm external interfacesare supported.

The system supports two75-ohm and two120-ohm external clock inputs, but it does not supportfourexternal clock inputs, and actually supports only two. The access method is as follows:

Figure 1. External Clock Access

Each access to 75 ohms, you can not access the120ohms, access to120ohms, you can not access the75ohms, you can only choose one of the two. However, the first and the second road does not matter, the first road to choose75ohms, the second road can choose75ohms or120ohms.

3 , the system protection characteristics

Single-board control system TPS protection switching control, protection switching time is required to be less than50 ms.MSP,SNCPand other protection switching protocols are realized by the cross-board.