ME0D0SRUAH77 (Switch and Route Processing Unit A20(SRUA-480-I, 32G Memory))
| Item | Details |
|---|---|
| Description | Switch and Route Processing Unit A20(SRUA-480-I, 32G Memory) |
| Part Number | 03050HFP |
| Model | ME0D0SRUAH77 |
| Card type | SRU |
| Silkscreen | SRUA-480-I |
| Port | Connector Type | Description | Available Components |
|---|---|---|---|
| FSP0, FSP1 | RJ45 | Reserved. It functions as an interface for fast chassis switchovers. | 8-core shielded cable |
| GE/10GE | SFP/SFP+ | Reserved cascading interface. | Reserved cascading interface. |
| HP-GE0, HP-GE1 | SFP | High-precision clock interface | Optical module (34060286/S4016067/34060484) and Atom GPS timing SFP module (03034CGQ) |
| MGMT-ETH | RJ45 | It connects to an NMS and can work in half-duplex or full-duplex mode. | Super category 5 shielded twisted pair |
| CON | RJ45 | It connects to the console for on-site system configuration. Baud rate: 9600 bit/s (default value), which is configurable. | 8-core shielded cable |
| AUX | RJ45 | Used to redirect to the serial port of the peer device. The default baud rate is 9600 bit/s. | 8-core shielded cable |
| CLK | RJ45 | Used to input or output 2 Mbit/s clock signals, 2 MHz clock signals. | 120-ohm clock cable. If the peer end is an SMB interface, a 120 ohm-75 ohm converter box is required. |
| TOD | RJ45 | Used to input or output 1pps+ASCII time signals, or two channels of DCLS time signals. | 120-ohm clock cable. If the peer end is an SMB interface, a 120 ohm-75 ohm converter box is required. |
| CLK-INT | RJ45 | Inputs or outputs 2 Mbit/s clock signals, 2 MHz clock signals, 1pps+ASCII time signals, or two channels of DCLS time signals. It is reserved. | 120-ohm clock cable |
| CLK/TEST | SMA | Used for clock tests. | 50-ohm clock cable |
| USB | USB Type A | USB interface, reserved for future use. | - |
| Functions and Features | Description |
|---|---|
| Basic function |
1. It is responsible for system control and management, including route calculation, device management and maintenance, and device monitoring. It also functions as the system synchronization unit to provide high-precision and high-reliability synchronization clock and time signals. 2. Switches cells between BSUs/MSUs, communicates with the main control boards over Ethernet, is subject to centralized control and management of the main control boards, and monitors the board temperature and voltage. |
| Reliability and availability |
Hot swapping is supported. The system control and switching fabric functions are integrated. The system control units work in 1:1 backup mode, and the switching fabric units work in 3+1 backup mode. The four SFUs load-balance services at the same time. If one SFU is faulty or replaced, the other three SFUs automatically take over its services to prevent service interruptions. This improves system reliability. |
| Restrictions and remarks | 1. This board cannot be installed in the same chassis as other types of main control boards. |
| Breakout supported | No |
| Interface rate auto-sensing supported | No |
