The LQM board is applicable to two scenarios: convergence of four services at Any rate and regeneration of one channel of OTU1 optical signals.
Prerequisite
You must have logged in to the NE where the board resides.
Tools, Meters, and Materials
Web LCT or T2000
Navigation Path
1. In the NE Explorer, select the board and then choose Configuration > WDM Interface from the Function Tree.
2. Select a proper navigation path according to the parameters. The details are as follows: l In the case of a parameter at channel level, select By Board/Port(Channel), choose
Channel from the drop-down list, and click the Basic Attributes or Advanced Attributes tab. Then, you can query or set the corresponding parameter.
l In the case of a parameter at board level, select By Board/Port(Channel) and choose Board from the drop-down list. Then, you can query or set the corresponding parameter.
NOTE
You can also select By Function and then choose the required parameter from the drop-down list.
Background Information
The service processing chip of the LQM board provides 16 timeslots for receiving services. Different types of services require different number of timeslots. The total number of timeslots for the services received at the LQM board must be smaller than the maximum number of timeslots that the service processing chip can provide. In addition, the total number of timeslots for the services configured at the TX1/RX1, TX2/RX2, TX3/RX3, and TX4/RX4 interfaces must be not greater than 16.
Table 5-2 lists the number of timeslots required by common services.
Table 5-2 Number of timeslots required by common services
Service Type Number of
Timeslots Required
Service Type Number of
Timeslots Required GE/GE(GFP_T) 7 FICON 6 STM-1 1 FICON EXPRESS 12 STM-4 4 ESCON 2 STM-16 16 DVB-ASI 2 FC200 12 HDTV 12 FC100 6 HDTV14835 12 FE 1 OTU1 16 FC100_SLICE 8 FICON_SLICE 8
Service Type Number of Timeslots Required
Service Type Number of
Timeslots Required FC200_SLICE 16 GE_SLICE 12 FICON_EXPRESS_ SLICE 16 - -
In case of GE services, the committed information rate can be configured to change the number of timeslots required. Table 5-3 lists the number of timeslots required by GE services at different bandwidths.
Table 5-3 Number of timeslots required by GE services Bandwidth (Mbit/ s) Number ofTimeslots Required Bandwidth (Mbit/ s) Number ofTimeslots Required 931-1000 7 311-465 3 776-930 6 156-310 2 621-775 5 1-155 1 466-620 4 - -
The LQM board supports slice services, such as GE_SLICE, FC100_SLICE, FC200_SLICE, FICON_SLICE, and FICON_EXPRESS_SLICE. Compared with common services, slice services feature better performance in transparent transmission of clock but require more timeslots. In practical application, select a proper service type according to the actual conditions. For example, when the LQM board is used to receive FC100 services, select FC100_SLICE if better performance in transparent transmission of clock is required and timeslots are sufficient. Otherwise, select FC100 so that more timeslots can be used to receive other types of services.
Precautions
CAUTION
If you delete a logical LQM board and configure it again on the NMS, the original configuration of the board is deleted and the default configuration is restored.
Parameter Settings
Field Value Description
Service Type OTU-1, DVB-ASI, HDTV, ESCON, FC-100, FC-100 (slice), FC-200, FC-200 (slice), FE, FICON, FICON express, FICON express (slice), FICON (slice), GE, GE(GFP-T),
GE_SLICE, STM-1, STM-4, STM-16, None
Default: OTU-1 (in the case of the TX1/ RX1 interface) or None (in the case of the other interfaces)
The requirement on the number of timeslots for service configuration is as follows: The total number of timeslots for the services configured at the TX1/RX1, TX2/RX2, TX3/RX3, and TX4/RX4 interfaces must be not greater than 16.
Rate requirements for service configuration are as follows:
l When the LQM board is used for converging four services at Any rate, set Service Type according to the types of the actually received services. The TX1/RX1 optical interface support service rates in the range of 125 Mbit/s to 2.5 Gbit/s and the other client-side optical interfaces support service rates in the range of 125 Mbit/s to 1.25 Gbit/s.
l When the LQM board is used for regenerating OTU1 signals, set Service Type to OTU1 for the TX1/RX1 optical interface.
Channel Use Status
Used, Unused Default: Used
l Set this parameter to Unused when a channel that is not used.
l Set this parameter to Used when a channel that is used.
For example, when the LQM board is used for regenerating OTU1 signals, set Channel Use Status to Unusedfor the TX2/RX2, TX3/RX3, TX4/RX4, and IN2/OUT2 interfaces and to Used for the TX1/RX1 and IN1/OUT1 interfaces. Automatic
Laser Shutdown
Enabled, Disabled Default: Disabled(in the case of the TX1/ RX2 interface), Enabled(in the case of other client-side optical interfaces), or Disabled(in the case of WDM-side optical interfaces)
l The default value is recommended.
l This parameter must be set to Disabledin the case of WDM-side optical ports. That is, other values are invalid.
In practical application, set this parameter according to the scenario where the board is used. For example, when the LQM board is used for regenerating OTU1 signals, set Automatic Laser Shutdown to Disabledfor the TX1/RX1 interface and retain the default value for the TX2/RX2, TX3/ RX3, and TX4/RX4 interfaces. Hold-Off Time of Automatic Laser Shutdown 0s to 2s, with a step of 100 ms. Default: 0s
Field Value Description Laser Status Open, Close
Default:
l WDM side: Open l Client side: Close
l Usually, this parameter is set to Open for every WDM-side optical interface.
l In the case of client-side optical interfaces, retain the default value because Automatic Laser Shutdown is usually set to Enabled.
In practical application, set this parameter according to the scenario where the board is used. For example, when the LQM board is used for regenerating OTU1 signals, set Laser Status to ONfor the TX1/RX1 and IN1/OUT1 interface and toOFF for the TX2/RX2, TX3/RX3, TX4/RX4, and IN2/OUT2 optical interfaces.
CAUTION
If communication between NEs is achieved through only ESC provided by the LQM board, the following situations occur when neither a standby channel is available nor protection is configured:
l When the LQM board is used for converging four services at Any rate, the NE becomes unreachable after the WDM-side lasers on the LQM board are disabled.
l When the LQM board is used for regenerating OTU1 signals, the NE becomes unreachable after the lasers at the TX1/RX1 and IN1/OUT1 interfaces on the LQM board are disabled.
FEC Working State
Enabled, Disabled Default: Enabled
l Enabled is recommended.
l FEC Working State of the two interconnected OTU boards must be consistent.
Field Value Description Guaranteed Bandwidth for Client- Side GE Service (M) 1-1000 Default: 1000
l Users determine the ensure bandwidth for GE services based on the needs. This parameter needs to be configured only for GE services. l The value of the Guaranteed Bandwidth for
Client-Side GE Service (M) parameter must be greater than the actual service bandwidth of users. Only in this case, no packet loss can be ensured.
l Retain the default value when timeslots are sufficient.
l When timeslots are insufficient, decrease the committed information rate (CIR) of GE services to decrease the number of required timeslots. This is to ensure that the total number of timeslots is within the required range. For example, when the TX1/RX1, TX2/RX2, TX3/ RX3, and TX4/RX4 interfaces are used to receive GE services, the CIR can be set to 620 Mbit/s. In this case, each GE service uses four timeslots. Hence, the total number of timeslots required by the services received at the TX1/ RX1, TX2/RX2, TX3/RX3, and TX4/RX4 interfaces is not greater than 16.
Optical Interface Loopback Non-Loopback, Inloop, Outloop Default: Non- Loopback
Set this parameter to Non-Loopback when a network works normally. It can be set to Inloop or Outloop to help locate a faulty point in a test or a process of removing a fault on a network. However, it must be set to Non-Loopback right after the test is complete or the fault is removed.
When Automatic Disabling of NE Function is set to the default value Enabled, the loopback setting is automatically cancelled after Auto Disabling Time (default: 5 minutes) elapses.
Max. Packet Length
1518-9600 Default: 9600
This paramter is valid only when Service Type is set to GE. The default value is recommended.
Field Value Description Auto- Negotiation of GE Enabled, Disabled Default: Disabled
The Auto Negotiation parameter is available only when the Service Type parameter is set to GE. l It is recommended to set this parameter to
Disabled.
l If the equipment of the customer adopts the auto negotiation, the value of the Auto Negotiation parameter must be consistent with the value of the Auto Negotiation parameter of the
equipment of the customer.
l The Auto Negotiation parameter must be consistent for the OTUs in the same protection group.
Intelligent Fiber Status
Enabled, Disabled Default: Enabled
When a link is faulty, and the fault state must be transparently transmitted to the interconnected client-side equipment, the IF function needs to be enabled.
l This parameter is valid only when Service Type of the optical port is set to GE.
l This parameter is invalid after the LPT function of the board is enabled.
SD Trigger Condition SM_BIP8_SD, PM_BIP8_SD, B1_SD Default: None
This parameter is valid only when the SD Trigger Flag is set to Enable.
all the alarms can be set as the SD switching conditions.
LPT Enabled Enabled, Disabled Default: Disabled
This parameter is valid when Service Type is set to GE.
l The LPT function can work only with intra- board 1+1 protection and cannot work with any other protection.
l Set this parameter to Enabled when you want to enable the LPT function; otherwise, keep the default value for this parameter.
8B10B Code Violation Threshold
0 to 15 Default: 15
This parameter is valid only when the service type at an optical interface is FC100, FC200, FICON, ESCON, FICON EXPRESS, or DVB-ASI. The default value is recommended. PRBS Test
Status
Enabled, Disabled Default: /
l Retain the default value when a network works normally.
l Set this parameter to Enabled for the auxiliary board if you need to perform a RPBS test during deployment commissioning. Set this parameter to Disabled after the test is complete.
Field Value Description Band Type/ Wavelength No./ Wavelength (nm)/ Frequency (THz)
The parameter format is as follows: band type/wavelength No./ optical interface wavelength/ frequency, for example, CWDM/ 11/1471.00/208.170. Default: -
This parameter is for query only.
Band Type C, CWDM
Default: /
This parameter is for query only.
Optical Interface/ Channel - - Optical Interface Name - -