OSN 3500 is a new-generation optical transmission system developed by Huawei. It adopts a unified switching architecture and can function as an MPLS/MPLS-TP-based packet device or a TDM device. When working with other devices of Huawei, OSN 3500 supports various networking modes, including the pure packet mode, hybrid networking (packet + TDM) mode, and pure TDM mode, achieving optimal processing for packet services and traditional SDH services. Thus, OSN 3500 efficiently transmits voice and data services over the same platform.
Version Description
The PEG8 is available in one functional version, namely, N1.
Version Mapping
| Board | Start Version |
|---|---|
| N1PEG8 | V200R011C00 |
Board Updates
This section describes the hardware updates in V200R013C30 and later versions as well as the reasons for the updates. Any product versions that are not listed in the document means that they have no hardware updates.
Hardware Updates in V200R015C30
| Type | Description |
|---|---|
| Add | New add the function "ETH-TRUNK". |
| Add | New add the function "LLDP(Link Layer Discovery Protocol)". |
Application
The PEG8 is mainly used in the packet data transmission field to transmit/receive data packets, manage bandwidths, and realize switching of data packets.
Figure 1 shows the typical networking and application of the PEG8. The PEG8 works with the cross-connect board that provides the packet switching function to meet the requirement of packet features. With this board, the TDM domain can be overlapped with the packet domain on the OptiX OSN equipment so that the data can be transmitted in the two domains. In this manner, an MSTP network can smoothly evolve to a packet switching network.
Application describes the typical networking and application when the PEG8 works with the PETF8.
Application describes the typical networking and application when the PEG8 works with the PEFF8.
Application describes the typical networking and application when the PEG8 works with the CQ1.
Application describes the typical networking and application when the PEG8 works with the MD12.
Application describes the typical networking and application when the PEG8 works with the MD75.
Functions and Features
PEG8 boards process and forward 8xGE services and support QoS functions such as traffic management, congestion control, and queue scheduling for data packets.
Table 1 lists the functions and features supported by PEG8 boards.
Working Principle and Signal Flow
The PEG8 consists of the network processing module, transmission management module, switching network buffering module, CPU management module, clock module, and power module.
Figure 1 shows the functional block diagram of the PEG8.
Receive Direction
The network processing module receives the signals sent from the GE interface on the front panel or the interface board, decodes the signals, and converts the serial signals into parallel signals. Then, the network processing module performs route searching or address matching for the data packets, and sends the corresponding packets to the transmission management module. The transmission management module buffers and schedules the packets, slices the packets into cells that the switching network requires, and sends the cells to the switching network buffering module. The switching network buffering module buffers the cells and sends the cells to the cross-connect unit.
Transmit Direction
The switching network buffering module processes the cells sent by the cross-connect unit and sends the cells to the transmission management module. The transmission management module rearranges the cells to form packets, performs buffering and QoS management for the packets, and sends the packets to the network processing module. The network processing module converts the parallel signals into serial signals, and sends the signals to the GE interface on the front panel of the board or the corresponding interface board through the backplane.
Network Processing Module
The network processing module performs route searching, address matching, and other functions for data packets. The network processing module of the PEG8 can process 5 Gbit/s data packets in full-duplex mode.
Transmission Management Module
The transmission management module slices packets into cells, and performs QoS management and large volume buffering for the cells.
- QoS management: The transmission management module provides the scheduling function at five levels for the flow queue and port queue, and the bandwidth restricting function, and provides the corresponding statistics information.
- Large volume buffering: The transmission management module supports traffic of 5 Gbit/s and can buffer data for 17 ms in both the upstream direction and downstream direction.
Switching Network Buffering Module
The switching network buffering module performs cell buffering, queue management, scheduling, and other functions. This module and the cross-connect unit form a three-level switching network to switch cells.
CPU Management Module
The CPU management module provides the parallel management bus, Ethernet bus, and other buses to manage the modules of the PEG8 and the interface board to which the PEG8 corresponds. The CPU management module also monitors alarms and performance events and reports the alarms and performance events to the SCC unit.
Clock Module
The clock module performs the following functions:
- Provides the clock signal for each module of the board.
- Supports the transparent transmission of the IEEE 1588v2 packets from the interface board or the 8xGE signals to the PSXCSA.
- Selects a clock source from the two system clocks sent from the PSXCSA and sends the selected clock to the interface board and the modules of the PEG8.
- Selects a clock source from the synchronous Ethernet clock signals accessed by the interface board or the 8xGE signals and sends the selected clock to the PSXCSA.
Power Module
The power module converts the accessed DC voltage into the DC voltages that the modules of the board require.
Front Panel
The front panel of the PEG8 has indicators, interfaces, a bar code, and a laser safety class label.
Diagram of the Front Panel
Figure 1 shows the appearance of the front panel of the PEG8.
Indicators
- Board hardware status indicator (STAT) - two colors (red and green)
- Service activation status indicator (ACT) - one color (green)
- Board software status indicator (PROG) - two colors (red and green)
- Service alarm indicator (SRV) - three colors (red, green, and yellow)
For the meanings of the status of the indicators, see Alarm Indicators on the Boards.
Interfaces
The front panel of the PEG8 has eight optical/electrical interfaces. Table 1 describes the type and usage of the interface of the PEG8.
Jumpers and DIP Switches
The PEG8 does not have any jumpers or DIP switches that are used for board settings.
Valid Slots
The PEG8 must be installed in a valid slot in the subrack. Otherwise, the PEG8 fails to work normally.
The PEG8 can be installed in slots 1-6, and 13-16 in the subrack.
- When the PEG8 is installed in slots 1-3, and 16, the bandwidth is 2.5 Gbit/s.
- When the PEG8 is installed in slots 4-6 and 13-15, the bandwidth is 5 Gbit/s.
When the PEG8 works with the interface board PETF8/PEFF8/CQ1/MD12/MD75, one PEG8 can work with a maximum of two PETF8/PEFF8/CQ1/MD12/MD75 boards. In this case, all the optical interfaces on the PEG8 can be used. Table 1 lists the slots valid for the PEG8 and the corresponding slots for the interface boards.
| Slot Valid for the PEG8 | Corresponding Slot for the Interface Board |
|---|---|
| Slot 1 | - |
| Slot 2 | Slots 19 and 20 |
| Slot 3 | Slots 21 and 22 |
| Slot 4 | Slots 23 and 24 |
| Slot 5 | Slots 25 and 26 |
| Slot 6 | - |
| Slot 13 | Slots 29 and 30 |
| Slot 14 | Slots 31 and 32 |
| Slot 15 | Slots 33 and 34 |
| Slot 16 | Slots 35 and 36 |
NOTE:
One-slot boards cannot work with cross-connect boards whose logical boards are N1PSXCS.
Technical Specifications of the PEG8
The technical specifications of the PEG8 include the Ethernet performance specifications, laser safety class, parameters specified for optical interfaces, mechanical specifications, and power consumption.
Parameters Specified for Interfaces
Table 1 lists the parameters specified for the interfaces of the PEG8.
| Port type | Description |
|---|---|
| 1000BASE-SX | 0.5 km GE two-fiber bidirectional optical interfaces |
| 1000BASE-LX | 10 km GE two-fiber bidirectional optical interfaces |
| 1000BASE-VX | 40 km GE two-fiber bidirectional optical interfaces |
| 1000BASE-ZX | 80 km GE two-fiber bidirectional optical interfaces |
| 1000BASE-LX | 10 km GE single-fiber bidirectional optical interfaces |
| 1000BASE-VX | 40 km GE single-fiber bidirectional optical interfaces |
| 40 km CWDM | 40 km GE CWDM optical interfaces |
| 80 km CWDM | 80 km GE CWDM optical interfaces |
| 120 km DWDM | 120 km GE DWDM optical interfaces |
| Electrical interfaces | GE electrical interfaces |
Laser Safety Class
The safety class of the laser on the board is Class 1. The maximum launched optical power of the optical interfaces is less than 10 dBm (10 mW).
Mechanical Specifications
The mechanical specifications of the PEG8 are as follows:
- Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
- Weight (kg): 1.2
Power Consumption
The maximum power consumption of the PEG8 at room temperature (25°C) is 47 W.
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