HUAWEI OSN 3500 03037064 SSN1GSCC GSCC Function

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 GSCC is available in several functional versions. The functions provided by the functional versions are different.

Table 1 describes the versions of the GSCC.

Table 1 Versions of the GSCC

Item	Description
Functional versions	The GSCC is available in the following functional versions: N4 and N6.
Differences	Packet performance specifications differ between the N4GSCC and the N6GSCC. For details, see Packet System Performance.
Substitution	The GSCC boards of different versions cannot directly substitute for each other. If the GSCC of a later version needs to substitute for the GSCC of an earlier version, the NE software needs to be upgraded accordingly.

Version Mapping

Board	Start Version
N4GSCC	V100R008C01
N6GSCC	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.

Application

The GSCC is the intelligent system control board. The GSCC works with the to manage the boards on the equipment and realize the communication between different pieces of equipment.

Figure 1 shows the position of the GSCC in the system.

Figure 1 Position of the intelligent system control board in the system

Functions and Features

The GSCC supports the system control, orderwire, communication, and system power supply monitoring.

Table 1 provides the functions and features of the GSCC.

Table 1 Functions and features of the GSCC

Function and Feature	GSCC
Basic functions	Performs the service configuration function and service grooming function, monitors the service performance, and collects information about performance events and alarms.
Interfaces	Provides the 10M/100M Ethernet port, which is used for communicating with the NMS. The Ethernet port is accessed through the AUX. Provides the F&f interface, which is accessed through the AUX and is used to manage the COA. Provides one 64 kbit/s synchronous data port F1, which is accessed through the AUX. Provides the RS232 OAM interface, which is used for connecting a PC or workstation, and supports the remote maintenance by using a modem that uses the RS232 DCE interface. The OAM interface is accessed through the AUX.
DCC communication	Processes a maximum of 160 DCCs (D1-D3). In this manner, the link is provided for transmitting the NM information.
Overhead processing	Processes the E1, E2, F1, and serial1-serial4 bytes.
Clock function	Provides the RTC. Supports the high-precision clock synchronization feature, and complies with the IEEE 1588 V2 protocol. The N4GSCC receives the time information through interfaces S1-S4 of the AUX. The S1, S3 and ALMI4 interfaces receive the first channel of time information, and the S2, S4 and ALMI4 interfaces receive the second channel of time information. Hot board swapping.
Alarms and maintenance features	Supports service performance monitoring and collects information about performance events and alarms. Provides 16 alarm inputs and four alarm outputs through the AUX. Provides one 4-output alarm cascading port through the AUX. Controls the four cabinet indicators through the AUX. Supports intelligent fan speed control and manages the fan alarms. Supports simulation package loading and diffused loading. Supports the function of detecting whether a packet data board is in position.
Power supply management	Supports the monitoring of the -48 V or -60 V power supply. Supports the in-service check function for the PIU board and supports the failure check function for the lightning protection module of the PIU.
Protection schemes	Supports the 1+1 Hot Backup for the SCC Unit. When the active board is faulty, services are switched to the standby board automatically. NOTE: If GSCC boards are used in packet systems, two N4GSCC/N6GSCC boards of the same version need to be configured in 1+1 backup mode.
Packet function	The N4GSCC and N6GSCC support the packet function. For information about the performance of the packet system, see Packet System Performance.

Working Principle and Signal Flow

The GSCC consists of the communication and control module, OHP module, and power module.

Figure 1 shows the functional block diagram of the GSCC.

Figure 1 Functional block diagram of the GSCC

Communication and Control Module

The communication and control module controls and manages the boards, realizes the communication between NEs, manages the network, and performs other functions.

• The system control module communicates with the boards in the subrack, manages the boards, monitors the performance events and alarms of the boards, collects the status information about the other functional modules, and performs the corresponding management operations.
• The communication and control module provides the function that NEs communicate with each other through DCCs. The communication module transfers the OAM information to other NEs through DCCs, reports the alarms and performance data of the equipment to the network management terminal, and responds to the commands issued by the network management terminal.
• The communication and control module configures and operates the NE.

 NOTE:

The service protection is realized by the cross-connect and timing board. When services are switched, the switching event is reported to the GSCC, which then reports the switching event to the NMS.

When the communication and control module fails, the following situations occur:

• Communication failure
  The communication and control module cannot manage the boards in the subrack, monitor the performance events and alarms of the boards, collect the status information about the other functional modules, or perform the corresponding management operations.
• DCC failure
  The communication and control module cannot transfer the OAM information to other NEs through the local NE, report the alarms and performance data of the equipment to the network management terminal, or respond to the commands issued by the network management terminal.

OHP Module

• Receives overhead signals from the line slot.
• Processes such bytes as E1, E2, F1 and serial1-4serial
• Sends overhead signals to the line board.
• Provides the following external interfaces:
  • One orderwire interface
  • Two SDH NNI audio interfaces
  • Interface F1
  • Broadcast data ports serial1-4serial

Figure 2 shows the orderwire bytes in the SDH frame.

Figure 2 Position of these orderwire bytes in the SDH frame

Power Module

It converts the -48V/-60V power supply into the DC voltages that the modules of the board require.

Front Panel

The front panel of the GSCC has indicators and a bar code.

Diagram of the Front Panel

Figure 1 shows the appearance of the N4GSCC/N6GSCC.

Figure 1 Front panel of the N4GSCC/N6GSCC

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)
• -48 V power supply indicator of channel A (PWRA) - two colors (red and green)
• -48 V power supply indicator of channel B (PWRB) - two colors (red and green)
• +3.3 V backup power supply indicator of the system (PWRC) - two colors (red and green)
• Alarm mute indicator (ALMC) - one color (yellow)

For the meanings of the status of the indicators, see Indicators.

Interfaces

The front panel of the GSCC has no interface. The AUX provides interfaces for the GSCC. For details, see AUX.

The front panel of the N4GSCC/N6GSCC has one warm reset switch and one alarm cut switch. Table 1 describes the types and usage of the switches

Table 1 Types and usage of the switches of the GSCC

Switch	Type of Switch	Usage
RESET	Warm reset switch	Press the switch to perform a warm reset for the SCC unit.
ALM CUT	Alarm cut switch	Press the switch to mute the alarm. Press the switch for five seconds to mute the alarm permanently. Press the switch again for five seconds to resume the alarm sound.

Jumpers and DIP Switches

The GSCC has jumpers, which are used to set the input voltage and running state of the equipment.

 NOTICE:

The jumpers are used for test and maintenance. Do not change the setting of jumpers at random. Otherwise, the board may become faulty.

After the board completes the operation specified by setting the BIOS DIP switch to a specific value, clear the DIP switch setting (that is, set the DIP switch to binary value 0000) before restarting the board; otherwise, the board cannot enter the normal running state.

N4GSCC

Figure 1 shows the layout of the J2101, J7100, J3201, and J3202 jumpers on the N4GSCC.

Figure 1 Position of the jumpers of the N4GSCC

Table 1 lists the jumpers of the N4GSCC.

Table 1 Jumpers of the N4GSCC

Jumper	Function	Description
J2101	To enable the battery	1-2: If jumper bits (positions) 1 and 2 are capped, the database and clock are cleared. 2-3: If jumper bits (positions) 2 and 3 are capped, the battery is enabled. It is the default state.
J7100	To set the running state of the board	Jumper J7100 is a group of two-pin jumpers located in five rows. The jumper in the lowest row is reserved and does not need to be set. In the case of the jumpers in the top four rows, the value of a jumper bit is defined as follows: If a jumper bit is not capped, the value is 0. If a jumper bit is capped, the value is 1. The jumper bit values are queued from bottom to top and from the higher bit to the lower bit, and form a four-bit binary number. For details, refer to Table 2.
J3202 and J3201	To set the input voltage of the equipment	When the jumpers are not capped, the equipment is supplied with the -60 V power. When the jumpers are capped, the equipment is supplied with the -48 V power. It is the default state.

 NOTICE:

Set J3202 and J3201 correctly based on the power voltage provided in the telecommunications room. If J3202 and J3201 are set incorrectly, the POWER_ABNORMAL alarm is generated.

Table 2 Jumper J7100

Value	Description
0b0000	Indicates the running state when the watchdog is started. It is the default state.
0b0001	Changes to the self-test state of the SDRAM Burst.
0b0011	Indicates the commissioning state.
0b0100	Indicates the running state when the watchdog is stopped.
0b0101	The software is in the BIOS state. The SCC does not work even though the NE software exists. The IP address of the parameter area, however, is not changed, which is for querying. When jumper J7100 is in this state, the FTP protocol is enabled by default.
0b0110	The software enters the exhibition mode.
0b1001	Indicates the running state when the watchdog is started.
0b1011	Erases the database.
0b1100	Erases the NE software, including the patches.
0b1101	Erases the database and NE software, including the patches.
0b1110	Erases the database, NE software, and NE.ini file.
0b1111	Erases the extended BIOS and system parameter area in the file system and flash memory.

N6GSCC

Figure 2 shows the layout of the J18, J11, J30, and J31 jumpers on the N6GSCC.

Figure 2 Position of the jumpers of the N6GSCC

Table 3 lists the jumpers of the N6GSCC.

Table 3 Jumpers of the N6GSCC

Jumper	Function	Description
J18	To enable the battery	1-2: If jumper bits (positions) 1 and 2 are capped, the database and clock are cleared. 2-3: If jumper bits (positions) 2 and 3 are capped, the battery is enabled. It is the default state.
J11	To set the running state of the board	Jumper J11 is a group of two-pin jumpers located in five rows. The jumper in the left-most row is reserved and does not need to be set. In the case of the jumpers in the right four rows, the value of a jumper bit is defined as follows: If a jumper bit is not capped, the value is 0. If a jumper bit is capped, the value is 1. The jumper bit values are queued from left to right and from the higher bit to the lower bit, and form a four-bit binary number. For details, refer to Table 4.
J30 and J31	To set the input voltage of the equipment	2-3 or jumpers are not capped: If jumper bits (positions) 2 and 3 are capped or jumpers are not capped, the equipment is supplied with the -60 V power. 1-2: If jumper bits (positions) 1 and 2 are capped, the equipment is supplied with the -48 V power. It is the default state.

 NOTICE:

Set J30 and J31 correctly based on the power voltage provided in the telecommunications room. If J30 and J31 are set incorrectly, the POWER_ABNORMAL alarm is generated.

Table 4 Jumper J11

Value	Description
0b0000	Indicates the running state when the watchdog is started. It is the default state.
0b0001	Changes to the self-test state of the SDRAM Burst.
0b0011	Indicates the commissioning state.
0b0100	Indicates the running state when the watchdog is stopped.
0b0101	The software is in the BIOS state. The SCC does not work even though the NE software exists. The IP address of the parameter area, however, is not changed, which is for querying. When jumper J11 is in this state, the FTP protocol is enabled by default.
0b0110	The software enters the exhibition mode.
0b1001	Indicates the running state when the watchdog is started.
0b1011	Erases the database.
0b1100	Erases the NE software, including the patches.
0b1101	Erases the database and NE software, including the patches.
0b1110	Erases the database, NE software, and NE.ini file.
0b1111	Erases the extended BIOS and system parameter area in the file system and flash memory.

Valid Slots

The GSCC must be installed in a valid slot in the subrack. Otherwise, the GSCC cannot work normally.

The GSCC can be installed in slots 17 and 18 in the subrack. By default, slot 18 houses the active board and slot 17 houses the standby board.

Technical Specifications of the GSCC

The technical specifications of the GSCC include the mechanical specifications and power consumption.

Mechanical Specifications

The mechanical specifications of the GSCC are as follows:

• Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
• Weight of the N4GSCC (kg): 1.0
• Weight of the N6GSCC (kg): 0.9

Power Consumption

The maximum power consumption of the GSCC at room temperature (25°C) is 19 W.

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