ME0D0SRUA770 (Switch and Route Processing Unit A7)
| Item | Details |
|---|---|
| Description | Switch and Route Processing Unit A7 |
| Part Number | 03054638 |
| Model | ME0D0SRUA770 |
| Card type | SRU |
| Silkscreen | SRUA |
| Port | Connector Type | Description | Available Components |
|---|---|---|---|
| Console | 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 |
| USB | USB Type A | USB interface, reserved for future use. | - |
| CF SLOT | TYPE II standard (compatible with TYPE I standard) | It is used to hold a CF card as a mass storage device. | - |
| MGMT-ETH | RJ45 | It connects to an NMS and can work in half-duplex or full-duplex mode. | Super category 5 shielded twisted pair |
| 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/TOD0, CLK/TOD1 | RJ45 | Used to input or output 2 Mbit/s clock signals, 2 MHz clock signals, 1pps+ASCII time signals, or two channels of DCLS time signals, BITS0 is configured for TOD0, and BITS1 is configured for TOD1. | 120-ohm clock cable |
| CLK/1PPS | SMB | Inputs 2 Mbit/s clock signals, 2 MHz clock signals, or 1 pps signals. | 75-ohm clock cable |
| CLK/Serial | SMB | Outputs 2 Mbit/s clock signals, 2 MHz clock signals, or RS232 signals. | 75-ohm clock cable |
| CTL-ETH-SFP0, CTL-ETH-SFP1 | SFP | Reserved cascading interface. | - |
| Functions and Features | Description |
|---|---|
| Basic function |
1. Responsible for system control and management operations, including route calculation, device management and maintenance, and device monitoring. As a system synchronization unit, this board provides high-precise and reliable clock and time signals. 2. Responsible for cell transmission between BSUs/MSUs and implements Ethernet communications with the SRU for centralized system control and management of the SRU. In addition, this board supports board temperature and voltage monitoring. |
| Reliability and availability | The main control boards and SFUs are integrated. The main control boards work in 1:1 backup mode, and the SFUs work in 2+1 backup mode. The three SFUs balance services at the same time. If one SFU is faulty or replaced, the other two SFUs automatically take over its services to ensure service continuity, improving system reliability. |
| Restrictions and remarks |
1. The board cannot work with the main control boards of other models. 2. The compatible forwarding mode is supported, but the enhance forwarding mode is not supported. |
| Breakout supported | No |
| Interface rate auto-sensing supported | No |
| Link protocol | - |
