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OSN 500 550 580 V100R008C50 Commissioning and Configuration Guide 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring the DDN Service

Configuring the DDN Service

On the DDN, the digital channels transport the digital signals. The DDN is mainly used to access and schedule the Nx64 kbit/s services and E1 services, to convert network services, and to provide the client with the private line interconnection services.

OptiX OSN 550/580 supports configuring DDN services.

Basic Concepts

Before you configure services on the DDN service access and aggregation boards, you need to become familiar with the related concepts such as the Nx64 kbit/s port and Framed E1 port, which help in understanding the service configuration process and the signal flow on the boards.

The OptiX OSN equipment is configured with DDN service access and aggregation boards to receive/transmit and groom DDN services on an SDH network.

DXM boards support the access and aggregation of DDN services.

Configuring the Point-to-Point Nx64 kbit/s Services

The point-to-point Nx64 kbit/s services provide the DDN solution and are applicable where the point-to-point Nx64 kbit/s services need to be accessed to the transmission equipment.

Networking Diagram

Four 64 kbit/s services need to be transported between NE1 and NE2. The V.35 port protocol is adopted.

Figure 2-36 shows the networking diagram for configuring the point-to-point Nx64 kbit/s services.

Figure 2-36  Point-to-point Nx64 kbit/s services

NOTE:

This topic considers the OptiX OSN 580 as an example to describe the board layout. In the case of other products, the configuration method is the same, except for the slots. For the slot information, see the Hardware Description of the relevant product.

Signal Flow and Timeslot Allocation

A DXM board receives Nx64 kbit/s DDN services through its DDN serial ports, aggregates and processes the Nx64 kbit/s DDN services, and transmits the Nx64 kbit/s DDN to an SDH network. The SDH network transparently transmits the Nx64 kbit/s DDN services to a remote node.

NE1 and NE2 require 4x64 kbit/s timeslots to transmit the DDN services. The allocation information of the 64 kbit/s timeslots is as provided in Table 2-64.

Table 2-64  Allocation of the 64 kbit/s timeslots
NE Board Source E1 Source Timeslot Range Sink E1 Sink Timeslot Range
NE1 7-DXM DDN19 1-4 2M-1 1-4
NE2 7-DXM DDN19 1-4 2M-1 1-4

According to the requirements of the 4x64 kbit/s DDN services, configure the service transmission as follows:

  • The DDN services occupy the first VC-12 timeslot in the first VC-4 (VC4-1: VC12-1) on the SDH link between NE1 and NE2 during the transmission on the SDH network side.
  • The DDN services occupy the SDH_TU-65 channel during the transmission on the PDH port side.
  • The DDN services trace the local 2 Mbit/s system clock and use 10s as the protection switching restoration time.
Table 2-65  Parameters for configuring the DDN serial port
Parameter NE1 NE2
Board 7-DXM 7-DXM
Port DDN19 DDN19
Protocol Mode V.35 Mode V.35 Mode
Serial Port Rate 4x64 kbit/s 4x64 kbit/s
Working Mode DCE DCE
Serial Port Clock Internal Mode Internal Mode
Clock Sampling Mode Triggered by Rising Edge Triggered by Rising Edge
Table 2-66  Parameters for configuring the 64 kbit/s services
Parameter NE1 NE2
Board 7-DXM 7-DXM
Source E1 DDN19 DDN19
Source Timeslot Range 1 1
Sink E1 2M-1 2M-1
Sink Timeslot Range 1 1
Bandwidth 4 4
Configuration Process

This topic describes how to configure the Nx64 kbit/s services.

Prerequisites

The Creating the Network task must be completed.

You must be familiar with the information of Signal Flow and Timeslot Allocation.

Procedure

  1. To configure the DDN service of NE1, do as follows:
    1. Set the attributes of the serial port that accesses the DDN service.



    2. Configure the PDH interfaces as follows:



    3. Set the attributes of the DDN clock source as follows:



    4. Configure the 64 kbit/s service as follows:



    5. Configure the cross-connections of the Nx64 kbit/s services to the SDH link as follows:



  2. To configure the DDN service of NE2, do as follows:

    Refer to Step 1 and configure the DDN service of NE2.

  3. Verify service configurations by following instructions in Testing DDN Services.
  4. See Enabling NE Performance Monitoring and enable the performance monitoring function of the NEs.
  5. Back up the configuration data of the NEs. For details, see Backing Up the NE Configuration Data to the SCC Board.

Configuring the Point-to-Point Framed E1 Service

The point-to-point Framed E1 service provides the DDN solution and is applicable where the point-to-point Framed E1 service needs to be accessed to the transmission equipment.

Networking Diagram

One Framed E1 service needs to be transported between NE1 and NE2. The F.E1 port protocol is adopted. The Framed E1 service occupies a 31x64 kbit/s bandwidth.

Figure 2-37 shows the networking diagram for configuring the point-to-point Framed E1 service.

Figure 2-37  Point-to-point Framed E1 service

NOTE:

This topic considers the OptiX OSN 580 as an example to describe the board layout. In the case of other products, the configuration method is the same, except for the slots. For the slot information, see the Hardware Description of the relevant product.

Signal Flow and Timeslot Allocation

A DXM board receives point-to-point Framed E1 services through its Framed E1 ports, aggregates and processes the Framed E1 services, and transmits the Framed E1 services to an SDH network. The SDH network transparently transmits the Framed E1 services to a remote node.

One Framed E1 service needs to be transported between NE1 and NE2. The allocation information of the timeslots that the Framed E1 service occupies is as provided in Table 2-67.

Table 2-67  Allocation of the 64 kbit/s timeslots
NE Board Source E1 Sink Timeslot Range Sink E1 Sink Timeslot Range
NE1 7-DXM DDN1 1-31 2M-1 1-31
NE2 7-DXM DDN1 1-31 2M-1 1-31

According to the requirements of the Framed E1 service, configure the service transmission as follows:

  • The Framed E1 service occupies the first VC-12 timeslot in the first VC-4 (VC4-1: VC12-1) on the SDH link between NE1 and NE2 during the transmission on the SDH network side.
  • The Framed E1 service occupies the SDH_TU-65 channel during the transmission on the PDH port side.
  • The Framed E1 service traces the local 2 Mbit/s system clock and uses 10s as the protection switching restoration time.
Table 2-68  Parameters for configuring the Framed E1 port
Parameter NE1 NE2
Port DDN1 DDN1
Protocol Mode F.E1 Mode F.E1 Mode
Working Mode PCM31 PCM31
Loopback Mode Non-Loopback Non-Loopback
CRC4 Enabled Disabled Disabled
Table 2-69  Parameters for configuring the 64 kbit/s services
Parameter NE1 NE2
Board 7-DXM 7-DXM
Source E1 DDN1 DDN1
Source Timeslot Range 1 1
Sink E1 2M-1 2M-1
Sink Timeslot Range 1 1
Bandwidth 31 31
Configuration Process

This topic describes how to configure the point-to-point Framed E1 service.

Prerequisites

The Creating the Network task must be completed.

You must be familiar with the information of Signal Flow and Timeslot Allocation.

Procedure

  1. To configure the DDN service of NE1, do as follows:
    1. Set the attributes of the Framed E1 port that accesses the DDN service.



    2. Configure the PDH interfaces as follows:



    3. Set the attributes of the DDN clock source as follows:



    4. Configure the 64 kbit/s service as follows:



    5. Configure the cross-connections of the Framed E1 services to the SDH link as follows:



  2. To configure the DDN service of NE2, do as follows:

    Refer to Step 1 and configure the DDN service of NE2.

  3. Verify service configurations by following instructions in Testing DDN Services.
  4. See Enabling NE Performance Monitoring and enable the performance monitoring function of the NEs.
  5. Back up the configuration data of the NEs. For details, see Backing Up the NE Configuration Data to the SCC Board.

Configuring the Combined Nx64 kbit/s and Framed E1 Services

The combined Nx64 kbit/s and Framed E1 services provide the DDN solution and are applicable where multiple types of DDN services need to be accessed to the transmission equipment.

Networking Diagram

The Nx64 kbit/s service and Framed E1 service need to be transported between two stations.

As shown in Figure 2-38, the service requirements are as follows:

  • Router A is located at NE1 and router C is located at NE2. The Framed E1 services must be configured between router A and router C, which occupy a 20x64 kbit/s bandwidth.
  • Router B is located at NE1 and router D is located at NE2. The 4x64 kbit/s services must be configured between router B and router D.
  • The Nx64 kbit/s services adopt the V.35 interface protocol.
  • The Framed E1 services adopt the F.E1 interface protocol.
Figure 2-38  Combination of Nx64 kbit/s services and Framed E1 services

NOTE:

This topic considers the OptiX OSN 580 as an example to describe the board layout. In the case of other products, the configuration method is the same, except for the slots. For the slot information, see the Hardware Description of the relevant product.

Signal Flow and Timeslot Allocation

The Nx64 kbit/s service and Framed E1 service are respectively accessed through the serial port and Framed E1 port on the DXM board, converged and processed on the DXM board, and then transmitted to the SDH side network for transparent transmission. Thus, service interaction with the remote nodes is realized.

The Nx64 kbit/s service and Framed E1 service need to be transported between NE1 and NE2. The allocation information of the 64 kbit/s timeslots that the Nx64 kbit/s service and Framed E1 service occupy is as provided in Table 2-70.

Table 2-70  Allocation of the 64 kbit/s timeslots
Service NE Board Source E1 Source Timeslot Range Sink E1 Sink Timeslot Range
Nx64 kbit/s service NE1 7-DXM DDN19 1-4 2M-1(SDH_TU-65) 1-4
NE2 7-DXM DDN19 1-4 2M-1(SDH_TU-65) 1-4
Framed E1 service NE1 7-DXM DDN1 1-20 2M-1(SDH_TU-65) 5-24
NE2 7-DXM DDN1 1-20 2M-1(SDH_TU-65) 5-24

According to the requirements of a combination of Nx64 kbit/s service and Framed E1 service, you can configure the service transmission as follows:

  • The combined services occupy the first VC-12 timeslot in the first VC-4 (VC4-1: VC12-1) on the SDH link between NE1 and NE2 during the transmission on the SDH network side.
  • The combined services occupy the SDH_TU-65 channel during the transmission on the PDH port side.
  • The combined services trace the local 2 Mbit/s system clock and use 10s as the protection switching restoration time.
Table 2-71  Parameters for configuring the DDN serial port
Parameter NE1 NE2
Board 7-DXM 7-DXM
Port DDN19 DDN19
Protocol Mode V.35 Mode V.35 Mode
Serial Port Rate 4x64 kbit/s 4x64 kbit/s
Working Mode DCE DCE
Serial Port Clock Internal Mode Internal Mode
Clock Sampling Mode Triggered by Rising Edge Triggered by Rising Edge
Table 2-72  Framed E1 port
Parameter NE1 NE2
Port DDN1 DDN1
Protocol Mode F.E1 Mode F.E1 Mode
Working Mode PCM31 PCM31
Loopback Mode Non-Loopback Non-Loopback
CRC4 Enabled Disabled Disabled
Table 2-73  Parameters for configuring the 64 kbit/s service
Parameter Nx64 kbit/s Service Framed E1 Service
NE1 NE2 NE1 NE2
Board 7-DXM 7-DXM 7-DXM 7-DXM
Source E1 DDN19 DDN19 DDN1 DDN1
Source Timeslot Range 1 1 1 1
Sink E1 2M-1(SDH_TU-65) 2M-1(SDH_TU-65) 2M-1(SDH_TU-65) 2M-1(SDH_TU-65)
Sink Timeslot Range 1 1 5 5
Bandwidth 4 4 20 20
Configuration Process

This topic describes how to configure the combined services: Nx64 kbit/s services and framed E1 services.

Prerequisites

The Creating the Network task has been completed.

You are familiar with Signal Flow and Timeslot Allocation.

Procedure

  1. To configure the DDN service of NE1, do as follows:
    1. Set the attributes of the serial port that accesses the DDN service.



    2. Set the attributes of the framed E1 port that accesses the DDN service.



    3. Configure the PDH interfaces as follows:



    4. Set the attributes of the DDN clock source as follows:



    5. Configure the 64 kbit/s service as follows:



      Repeat 1.e to configure the 64 kbit/s service for the framed E1 service according to the plan described in Table 2-73.

    6. Configure the cross-connections of the combined Nx64 kbit/s and framed E1 services to the SDH link as follows:



  2. To configure the DDN service of NE2, do as follows:

    Refer to Step 1 and configure the DDN service of NE2.

  3. Verify service configurations by following instructions in Testing DDN Services.
  4. See Enabling NE Performance Monitoring and enable the performance monitoring function of the NEs.
  5. Back up the configuration data of the NEs. For details, see Backing Up the NE Configuration Data to the SCC Board.
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Updated: 2019-01-21

Document ID: EDOC1100020976

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