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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 2- or 4-Wire Audio and E&M Trunk Services

Configuring 2- or 4-Wire Audio and E&M Trunk Services

This section describes how to configure 2- or 4-wire audio and E&M trunk services. As networks develop, a local private branch exchange (PBX) needs to be connected to a private network through transport devices, and private networks at different places need to be connected. AT8 boards can transparently transmit E&M signaling and 2- or 4-wire audio services, and therefore receiving private network services. The transmission of 2- or 4-wire audio services and E&M signaling involves 2- or 4-wire audio and E&M trunk and point-to-point control signal transmission scenarios. Configurations for the two scenarios are the same. This section describes how to configure 2- or 4-wire audio and E&M trunk services.

Networking Diagram

This section describes the networking of NEs.

Figure 2-26 shows the networking diagram for 2- or 4-wire audio and E&M trunk services. Private branch exchanges (PBXs) are connected to transport devices using 2- or 4-wire audio and E&M ports to transmit E&M signaling and 2- or 4-wire audio services. The transport devices function as trunk for signaling and audio services (data).

Figure 2-26  Networking diagram for 2- or 4-wire audio and E&M trunk 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.

Service Planning

This section describes the parameters required for configuring 2- or 4-wire audio and E&M trunk services.

Each of NE 1 and NE 2 requires a 64 kbit/s service channel. Table 2-20 provides the timeslot allocation of a 64 kbit/s service channel.

Table 2-20  Timeslot allocation of a 64 kbit/s service channel
NE Board Source E1 Source Timeslot Range Sink E1 Sink Timeslot Range
NE1 11-AT8 DDN-1 1 2M-1(SDH_TU-65) 1
NE2 11-AT8 DDN-1 1 2M-1(SDH_TU-65) 1
  • The 2- or 4-wire audio and E&M trunk services occupy the SDH_TU-65 channel during the transmission at the PCM port side.
  • The 2- or 4-wire audio and E&M trunk services occupy the first VC-12 timeslot in the first VC-4 (VC4-1:VC12-1) on the SDH link between NE 1 and NE 2 during the transmission at the SDH network side.
Table 2-21  Port management parameters
Parameter NE1 NE2
Board 11-AT8 11-AT8
Port 11-AT8-1(DDN-1) 11-AT8-1(DDN-1)
A/μ Law A law A law
Working Mode 1E1M 1E1M
User Line Mode Four-line Four-line
Other parameters Default values Default values
Table 2-22  64 kbit/s service parameters
Parameter NE1 NE2
Board 11-AT8 11-AT8
Direction Bidirectional Bidirectional
Source E1 DDN-1 DDN-1
Source Timeslot Range (e.g. 1, 3-6) 1 1
Sink E1 2M-1(SDH_TU-65) 2M-1(SDH_TU-65)
Sink Timeslot Range (e.g. 1, 3-6) 1 1
Bandwidth 1 1
Table 2-23  SDH service parameters
Parameter NE1 NE2
Level VC12 VC12
Direction Bidirectional Bidirectional
Source Slot 11-AT8 11-AT8
Source VC4 - -
Source Timeslot Range (e.g. 1, 3-6) 65 65
Sink Slot 4-SL41O-1(SDH-1) 4-SL41O-1(SDH-1)
Sink VC4 VC4-1 VC4-1
Sink Timeslot Range (e.g. 1, 3-6) 1 1

Configuration Procedure

This section describes the procedure for configuring 2- or 4-wire audio and E&M trunk services.

Prerequisites

Procedure

  1. Configure a pulse code modulation (PCM) service on NE 1.
    1. Navigate to the NE Explore of NE1, select the desired AT8 board, and configure the attributes of the ports for receiving and transmitting the PCM service.

      NOTE:

      In this example, retain the default values for the other parameters in the Port Management window. On live networks, set these parameters according to the network plan. For details about the parameters, see Port Management Parameters.

    2. Configure a 64 kbit/s service.

    3. Configure the cross-connection between the PCM service and an SDH link.

  2. Configure a PCM service on NE 2.

    Follow instructions in 1 to configure a PCM service on NE 2.

  3. Check whether the service is correctly configured by following instructions in Testing 2/4-Wire Audio and E&M Trunk Services.
  4. Enable the performance monitoring function for the NEs by following instructions in Enabling NE Performance Monitoring.
  5. Back up the configuration data of the NEs by following instructions in 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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