After using the device, the user may change the default user name and password. If you forget the password of user root, perform the following method.

Load the empty database matched the device again through DoS. After restarting the device, log in to the system by using the default root password admin (OLT) or mduadmin (MDU). This method will lead to loss of data configurations and the user needs to configure the data again.

According to the protocol, the OLT regards itself having failed to receive optical signals after it fails to detect any optical signals for consecutive four frames, and then the OLT sets the status of the PON port to down. The upstream optical frequency of the ONU is 8000 frame/s, and 0.5 ms for four frames, so the MA5600T/MA5603T/MA5608T reports the LOS alarm 0.5 ms after its PON port does not receive any optical signals.

During the upgrade, run the display progress load command to query the package file loading progress. The progress stays at 99% for a period of time. Please wait patiently.

When running the display patch all command, you can query the current version of the system and the information about the running patch.

When running the display language command, you can query the version that is running in the system, namely, the version of the active control board.

When running the display version frameid/slotid command, you can query the C-level version and the board hardware version of the control boards.

The OLT does not allow two users to perform the ping operation concurrently. If a user logs in to the system and performs the ping operation, and then another user performs the ping operation, a failure message is displayed.

During the upgrade, run the display progress load command to query the package file loading progress. The progress stays at 99% for a period of time. Please wait patiently.

According to the latest password security policy, the default user name and password of the MA5800 are root and admin123. The default user name and password of the MA5600T are changed from root and admin to root and admin123 from V800R017C00. To enhance security, you are advised to change the password upon your first login.

The power consumption is limited. When both MA5600T and MA5800 are installed in the same cabinet, service boards are configured according to the remaining power supply of the entire cabinet.

The OLT discards related alarms when the CPU usage is 70% or 85%.

When the CPU usage is 70%, alarms excluding LOSi, LOS and DGi are discarded.

When the CPU usage is 85%, alarms excluding LOS and DGi are discarded.

The MA5800 has a brand-new hardware structure, so the boards on the MA5600T can not be used.

If the MA5600T reports that the EMAC chip is faulty, it does not indicate that the board hardware or chip is faulty.

Reset the board or remove and insert the board. If the fault is rectified, there is no need to replace the board. If the fault persists, replace the board.

10G GPON board can not work with the GPON ONU. Therefore, the services of the GPON ONU cannot be migrated to the 10G GPON port.

The OLT does not allow two users to perform the ping operation concurrently. If a user logs in to the system and performs the ping operation, and then another user performs the ping operation, a failure message is displayed.

Cause: The OLT does not allow two users to perform the ping operation currently. When processing the ping operation, the OLT locks the invoked service module till the completion of the processing. Therefore, only after the first ping operation completes and the system unlocks the invoked service module, the second ping operation can be performed.

The multicast duplication can be concurrently achieved on the OLT and BRAS. On the OLT, when the IGMP proxy is enabled, the session duplication function can be configured on the BRAS. These two functions do not conflict with each other.

When running the display patch all command, you can query the current version of the system and the information about the running patch.

When running the display language command, you can query the version that is running in the system, namely, the version of the active control board.

When running the display version frameid/slotid command, you can query the C-level version and the board hardware version of the control boards.

The OLT discards related alarms when the CPU usage is 70% or 85%.

• When the CPU usage is 70%, alarms excluding LOSi, LOS and DGi are discarded.
• When the CPU usage is 85%, alarms excluding LOS and DGi are discarded.

According to the protocol, the OLT regards itself having failed to receive optical signals after it fails to detect any optical signals for consecutive four frames, and then the OLT sets the status of the PON port to down. The upstream optical frequency of the ONU is 8000 frame/s, and 0.5 ms for four frames, so the MA5600T/MA5603T/MA5608T reports the LOS alarm 0.5 ms after its PON port does not receive any optical signals.

As described in the protocol, LOS Loss of Signal The OLT did not receive any expected transmissions in the upstream (complete PON failure) for 4 consecutive frames.

After the standby control board is replaced and data between the active and standby control boards is synchronized, run the save command to save the data. Otherwise, data will be lost after an active/standby switchover.

On the MA5800, both the control board and the upstream board can be used for 10GE/GE upstream transmission. By default, the device uses 10GE for upstream transmission. You can set the upstream port by running speed command. To avoid communication failures, the rate of the upstream port must be the same as that of the port on the interconnected device.

The ports in power deny state malfunction. The possible causes are as follows:

The ports are locally or remotely locked. The ONU sets the ports to work in power deny state to save power.

The quality of physical subscriber lines does not meet usage requirements.

After changing data configuration or resolving subscriber line quality issues, run the reset command to restart the ports in diagnose mode to restore them.

The U2000 V200R014C60 and later versions support the MA5800. It is recommended that you use the NMS version matched with the MA5800 version.

The OT928G does not support modification of the timer length configured in the digitmap. The timers include initial timer, long-term timer, and short-term timer. The default timer length is:

Initial timer (T): 16s

Short-term timer (L): 2s

Long-term timer (S): 16s

The database of the SCUN board can be updated by internal database upgrade, but the databases of the SCUB, SCUF and SCUL boards cannot be updated by internal database upgrade because of the limitation on their databases.

If the MA5600T reports that the EMAC chip is faulty, it does not indicate that the board hardware or chip is faulty.

Reset the board or remove and insert the board. If the fault is rectified, there is no need to replace the board. If the fault persists, replace the board.

Use either of the following methods to restore factory settings for an ONT:

Choose System Tools > Restore Default Configuration from the main menu on the web page and click Restore Default Configuration.

Hold down the RESET button for a long period of time (longer than 10s) to restart the ONT with factory settings.

• For the V100R006C00, V100R006C01, V200R006C00, V200R006C01, and earlier versions:

Load a software version. The C0X version determines the voice protocol used on an ONT: SIP is used if X is an even number and H.248 is used if X is an odd number.

• For the V300R012C00 and later versions:

Choose Voice > SIP/H.248 Protocol Conversion from the main menu on the web page.

Query the ONT nameplate to determine whether an ONT supports routing. If "gateway HGU" is marked on an ONT nameplate, the ONT is of the gateway type and supports routing. If "bridging SFU" is marked on an ONT nameplate, the ONT is of the bridging type and does not support routing.

Configure the Wi-Fi service through web pages or TR069 servers for an ONT that supports Wi-Fi. For details, see the user manual of each ONT device.

The default user name and password for the administrator are telecomadmin and admintelecom, respectively. The default user name and password for common users are root and admin, respectively.

For the ONTs using GPON upstream transmission: -27 dBm to -8 dBm (Class B+); -30 dBm to -8dBm (Class C+).

For the ONTs using XG-PON upstream transmission: -28dBm to –8dBm(Class N1a); -28dBm to -8dBm(Class N2a).

Yes, but ONT's factory password cannot be separately restored. To restore the password, restore the ONT's factory settings. Query the ONT's password on the TR069 server or iTMS.

Configure the voice service through web pages, U2000, or TR069 servers on an ONT that supports the voice service. For details, see the user manual of each ONT device.

No. ONTs cannot connect to a PON terminal, switch, or router in the lower layer.

Yes. The POS service is a type of data service, which promotes high requirements on network quality.

No. The optical port on an ONT is a PON port while the optical port on an optical transceiver is a GE port.

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The method of provisioning the POS service on an ONT is the same as that of provisioning the common voice service on the ONT. For details, see the ONT user manual.

Yes. The service is affected in the same channel.

Choose Voice > VoIP Basic Configuration from the main menu on the web page and configure Digitmap Match Mode.

All gateway ONTs have supported IPv4, IPv6, and DS-Lite since V200R006C00/V200R006C01.

All ONTs providing voice ports support polarity reversal impulse. To configure polarity reversal impulse on an ONT, choose Voice > VoIP Advanced Configuration from the main menu on the web page or configure the universal value-added service profile through the U2000.

SDH boards support POS and CPOS services. VC-4 services are configured on POS ports, and VC-12 services are configured on CPOS ports. When you configure VC-12 services, pay attention to the timeslot allocation mode. The default timeslot mode is the sequential mode.

The active and standby system control boards must have the same hardware version and software version. Otherwise, data synchronization between the two boards will be affected.

OSN3500 is STM64 level MSTP, while OSN1500 is STM16 level.

No, OSN3500 power interface unit PIU is DC -48V input only.

Yes, besides EAS2 boards, also have PEX1 and PEX2; different is EAS2 for MSTP version, PEX1/PEX2 for Hybrid MSTP version.

The CXL board is a three-in-one board, which comprises the line, cross-connect and SCC modules (The 2500CRG is a two-in-one board and consists of a clock module and main control module). The modules are logically independent from each other and each of them has its slot number and board type. CXL is physically one board. Therefore, resetting (soft or hard resetting) of any module is to set the three modules (or two boards in the 2500CRG). The three modules have the same resetting effect.

The OSN products under standard configuration are installed with the SCC unit, fans and PIU. If any of them is not in the proper position, the bdstatus alarm will be reported, telling the user that the equipment is not under the standard configuration and needs to be handled.

The backplane versions before VER.B of the extended subrack (excluding VER.B) do not support the in-position query of the PIU board.

The signaling received by the SAP board is incomplete (the 2552 chip of the SAP board has received the complete signaling, but interrupt signal transmission is abnormal. The interrupt signal is not canceled in time). As a result, the phone fails. This problem is caused by the interruption mechanism of the system. Interrupt signals may be not generated due to the impact of interrupt signals from other systems or users.

Because traffic control is not implemented for intranet segments, netTask occupies CPU resources for a long time. As a result, the watchdog resets.

Because the OSN 2500 REG has no cross-connect board, the clocks of the line board and SAP board are different. Therefore, F1 services are transiently interrupted.

According to the BOQ, we have:

TNX1CTU01    60,5x4=242 W

UXCS              165x14=2310 W

TNX1G404C01    4x262=1048 W

G220                 4x148=592 W

Totally we should have 4192 W. Since in the BOQ there are two POP (POP1 and POP3), for one device the power consumption should be around 2096W.

If the device is OptiX OSN 1800 I&II compact, you can reset the IP address to the default factory IP address in this way:

1. Press F1SCC or F3SCC board LAMP button for 5-10s, then release it
2. Press LAMP button again for about 5s, then the IP will be changed back to the default IP address 129.9.X.X.

 If this method don't work, then we suggest to change the SCC board.

Yes. In the single-fiber unidirectional mode, the WDM system transmits multi-wavelength optical signals in the receiving and transmitting directions through separate optical fibers.

This mode has the characteristics of simple design, low requirements, convenient fault isolation and performance monitoring, convenient operation and maintenance, flexible networking, etc., which is convenient for upgrade and expansion.

Yes. In the single-fiber bidirectional mode, multi-wavelength typical signals are transmitted in the receiving and sending directions through only one fiber. 

This mode is mainly used on the client side and is realized by the filtering function of the single-fiber bidirectional optical module. Different center wavelengths are used in both directions.

Compared with the single-fiber unidirectional mode, this mode is characterized by saving 50% of fiber resources. However, its design and operation and maintenance of the WDM system are more complicated. The protection range must be configured to separate wavelengths to prevent signal interference in both directions, thereby wasting spectrum.

100G coherent signals have severe non-linear effects than non-coherent 10G signals. Therefore, the incident optical power of coherent 100G single wavelengths must be decreased.

The nominal single-wavelength input optical power of the HBA board in the OSN 6800 is as follows:
-22 dBm (in an 80-wavelength system)
-19 dBm (in a 40-wavelength system)
-13 dBm (in a 10-wavelength system

If the TN12XCS board is used, each of the IU1, IU4, IU11, and IU14 slots supports a maximum cross-connect capacity of 40 Gbit/s. Each of the other service slots supports a maximum cross-connect capacity of 20 Gbit/s.
If the TN11XCS board is used, each of all service slots supports a maximum cross-connect capacity of 20 Gbit/s.
When IU17 is used as a service slot, no service grooming is supported.

Yes, an OSN 8800 T16 subrack can house a TN53NS2 board.

There is no specific temperature after which the equipment will operate abnormally. Generally, it is recommended that the long-term operating temperature be within the range of 5°C to 45°C and the short-term operating temperature be within the range of -5°C to +55°C. Short-term operation indicates continuous operation for less than 96 hours or operation for less than 15 days in a year.

The following WDM service boards support STM-4 services: LDM, LQM, TOA, TOM, and TQM.

N63B cabinets are universal equipment cabinets and can be used to hold different types of subracks or frames.

An N63B cabinet is divided into four areas from top to bottom. Each of the OptiX OSN 8800 T16 subrack, OptiX OSN 8800 platform subrack, OptiX OSN 8800 universal platform subrack, and OptiX OSN 6800 subrack occupies one area, and the OptiX OSN 8800 T32 subrack occupies two areas

In the ME60, all CF cards on the MPU/SRU do not support hot swap. In the ME60-X8 and ME60-X16 chassis, the CF cards support hot swap after the offline buttons of CF cards are pressed.

The NE20E-S2F has two power supply models, AC power supply and DC power supply. 

The hybrid power supply will report a power mismatch alarm.

And if the two-way power supply is not the same, there will be a voltage difference between the AC and DC power ground. If the voltage difference is large, the device may be damaged.

So NE20E-S2F can't work with 1 AC supply and 1 DC supply at the same time.

User identifiers include device IDs and user IDs.

A device ID is the ID of a device used by users. The devices can be a plain old telephone service (POTS) phone or a user agent device, such as IP phones and software.

A user ID is a unique number assigned to a user. A user ID is the owner of a device ID, and indicates a user's identity. A user ID and a Session Initiation Protocol (SIP) server domain constitute a URL. A device ID can belong to multiple user IDs.

Each user has a fixed user identifier, which is bound to a unique device ID. Usually, a user identifier is the global number or long code for the user. Users can dial long codes to call each other, which is the common dial-up mode. Internal numbers or private numbers are provided to users inside the same group, such as an enterprise, company, group organization, school, or hotel. Users in the same group can dial each other's short numbers or private numbers.

Run the undo info-center enable command in the system view to disable the information center. After the undo info-center enable command is executed, logs including logs generated by the undo info-center enable command, traps, and debugging messages are not recorded.

No, DHCP snooping function can only be supported by the LAN card.
To restrict source MAC addresses without a LAN card installed, the router can use Layer 2 ACL. However, Layer 2 ACL is not a replacement for DHCP snooping.

In V200R003C00/01
The default user name, password, and user level for SSH users are admin, admin, and 15 on AR150&200 series routers. The default user name, password, and user level for web management users are admin, admin, and 15 on AR150&200 series routers.

In V200R005C00/10/20
The default user name, password, and user level for SSH users are admin, [email protected] or admin, and 15 on AR150&160&200 series routers. The default user name, password, and user level for web management users are admin, [email protected] or admin, and 15 on AR150&160&200 series routers.
The default password for the BootROM menu is [email protected]

Normally no policy can be applied on this type of interface (bridge interface). As a workaround, the traffic policy can be configured on the physical interfaces and these can be added into the bridge group. As a note, in the product documentation it specifies that when an interface is added to a network bridge, the traffic policy can be only applied to the interface in the inbound direction.

The current configuration file is A, upload the new configuration file B through FTP/SFTP to the router, run the command "rollback configuration to file B", this command replace the current configuration with the new configuration, without any combination or reboot to the router, can meet customer's requirement.

A space in an ESN of an AR router is an invalid character.

An AR router supports user levels 0-15. The value 0 indicates the visit level, value 1 indicates the user level, value 2 indicates the configuration level, values 3 to 15 indicate the management level.

V200R001C00, the first installed USB port is USB0 and the second installed USB port is USB1.

From V200R001C01, facing the panel where USB ports are installed, on the AR1200 series, the left USB port is USB1 and the right USB port is USB0; on the other AR series routers, the left USB port is USB0 and the right USB port is USB1.

If the WAN indicator is steady green, the system is processing services. If the indicator is off, the system is not processing any services.

DC-powered NE40 can be powered by an AC power supply. NE40 can house either DC power modules or AC power modules. Do not insert both DC power modules and AC power modules in an NE40.

The AR router supports the following trunks: PRA, AT0, SIP, E1R2, and H323 trunks.

Currently, AR series routers support the following two voice service modes: Session Initiation Protocol access gateway (SIP AG) and private branch exchange (PBX). You can run the display voice service-mode command to view the voice service modes of the current AR.

Flexible Cards-E have rear TM chips and support user-side HQoS. Common flexible cards do not support HQoS.

The BSUF-40/MSUF-40 supports only 20-port 100-1000base-x-sfp and 2-port 10ge lan/wan-xfp flexible cards.

The BSUF-40/MSUF-40 does not support 1-port 10ge lan/wan-xfp or 10-port 1000base-x-sfp FICs.

The ME60 supports inter-board trunk, and therefore interfaces on interface boards of different types can be bundled into a trunk interface.

The ME60 supports inter-board trunk, and therefore interfaces on interface boards of different types can be bundled into a trunk interface.

When the ME60 works in auto mode, channels are delivered by the Content Manage System (CMS) and cannot be configured on the ME60.