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 IXCSA is available in one functional version, namely, N1.
Version Mapping
Board | Start Version |
---|---|
N1IXCSA | V200R015C20 |
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 V200R015C20
Update Type | Description |
---|---|
New | N1IXCSA boards are added. |
Application
The IXCSA is an infinite cross-connect and synchronous timing board. The IXCSA provides service grooming and clock input/output functions in the OptiX OSN 3500 system.
Functions and Features
The IXCSA grooms services and inputs/outputs clock signals.
Cross-Connect Unit
Table 1 provides the functions and features of the cross-connect unit of the IXCSA.
Function and Feature | IXCSA |
---|---|
Basic functions |
|
Service processing |
|
Protection schemes | Supports the 1+1 Hot Backup for the Cross-Connect and Timing Units (non-revertive, by default). |
Maintenance feature | Hot board swapping. |
Clock Unit
Table 2 provides the functions and features of the clock unit of the IXCSA.
Function and Feature | IXCSA |
---|---|
Basic functions | Provides the standard system synchronization clock. |
Other functions |
|
Input and output |
Through the AUX board:
|
Working Principle and Signal Flow
The IXCSA consists of the synchronous timing module, cross-connect module, communication and control module, and power module.
Figure 1 shows the functional block diagram of the IXCSA.
Figure 1 Functional block diagram of the IXCSA
SETG: synchronous equipment timing generation function |
Synchronous Timing Module
The synchronous timing module uses the centralized timing allocation mode as the clock mode. The synchronous timing module also selects one clock source from reference clock sources as the reference clock for the timing module. The reference clock sources are from the line board, the tributary board, or the external synchronous clock source. The synchronous clock source and 2 Mbit/s or 2 MHz external synchronous clock source are then generated.
The precise 38 MHz oscillator ensures that the reference clock complies with ITU-T standards in free-run mode.
The SDH clock (SETS) can work in the following modes:
- Lock mode
- Hold-over mode
- Free-run mode
When working in lock mode, the SETS extracts the clock from three types of timing signals:
- Timing signal (T1) from the STM-N line
- Timing signal (T2) from the PDH line
- Reference signal (T3) from the external synchronous clock source (2 MHz or 2 Mbit/s)
The timing module outputs the following timing signals:
- T0, system clock
- T4, external timing output signal (2 Mbit/s or 2 MHz)
Cross-Connect Module
The cross-connect module consists of two parts:
- SNCP module, which tests relative alarms and reports the alarms to the software to trigger the protection switching such as the SNCP switching and MSP switching.
- Higher order and lower order cross-connect module, which performs the functions of higher order and lower order cross-connect units.
Communication and Control Module
The communication and control module is a sub-system provided by the pinch board. It consists of the CPU, register, Ethernet port, HDLC controller, FPGA loading controller, and bus driver. This module is connected to external circuits through buses to manage and configure other units of the boards.
Power Module
It converts the –48 V/–60 V power supply into the DC voltages that the modules of the board require.
Front Panel
The front panel of the IXCSA has indicators and a bar code.
Diagram of the Front Panel
Figure 1 shows the appearance of the front panel of the IXCSA.
Indicators
The front panel of the board has the following 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)
- Synchronization clock status indicator (SYNC) - two colors (red and green)
For the meanings of the status of the indicators, see Indicators.
Interfaces
The front panel of the IXCSA has no interface. The AUX provides the IXCSA with the external clock interface that can be set in 2048 kHz mode or 2048 kbit/s mode. The AUX provides two BITS clock interfaces with 120-ohm or 75-ohm impedance. For details, see AUX.
Jumpers and DIP Switches
The IXCSA does not have any jumpers or DIP switches that are used for board settings.
Valid Slots
The IXCSA must be installed in a valid slot in the subrack. Otherwise, the IXCSA cannot work normally.
The IXCSA can be installed in slots 9 and 10 in the subrack. By default, slot 9 houses the active board and slot 10 houses the standby board.
Technical Specifications
The technical specifications of the IXCSA include the parameters specified for dimensions, weight, and power consumption.
Mechanical Specifications
The mechanical specifications of the IXCSA are as follows:
- Dimensions (mm): 40.0 (W)×235.2mm (D)×261.4mm (H)
- Weight (kg): 2.1
Power Consumption
The maximum power consumption of the IXCSA at room temperature (25°C) is 94 W.
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