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Voice Feature Guide 01

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Configuring the R2 Service

Configuring the R2 Service

With the R2 access technology, the Access node provides access services on common twisted pair cables when interconnecting with the PBX using R2 signaling.


  • The operation mode of the EDTB board must be configured as service mode, which can be configured using the board workmode command.
  • The working mode of the EDTB board must be configured as voice mode, which can be configured using the runmode command.
  • The signaling type of ports on the EDTB board must be configured as channel associated mode, which can be configured using the e1port signal command.

For the H.248-based MoIP service:

For the SIP-based MoIP service:


  • R2 signaling is channel associated signaling (CAS), which is international standard signaling based on E1 digital network.
  • The Access node connects the PBX and NGN network using R2 signaling, achieving transition from the PSTN network to the NGN network.


  1. Run the r2 profile command to add an R2 profile. Define the R2 signaling with a specific feature as an R2 profile which can be used when an R2 user is added.
  2. (Optional) Run the profile attribute command to configure the signaling type of the R2 profile.
  3. (Optional) Configure adaptation data of the R2 profile.

    The ITU-T Q.400-Q.490 standard has defined R2 signaling standard, but different countries and regions implement R2 signaling in different ways. You do not need to change parameter values if the parameter values defined in the signaling standard of a country are consistent with the default values defined by the Access node. Otherwise, you need to change the parameter values based on actual conditions.

    • Run the address-receive attribute command to configure the receive attribute of R2 addresses.
    • Run the address-send attribute command to configure the transmit attribute of R2 addresses.
    • Run the profile attribute command to configure the signaling type of the R2 profile.
    • Run the line-signaling attribute command to configure the R2 line signaling attribute.
    • Run the register-signaling attribute command to configure the R2 register signaling attribute.

  4. (Optional) Run the multi-r2-adapt add command to add parameters of the state machine of register signaling and line signaling in adaptation profiles for multiple countries. To comply with the R2 standards of different countries, parameter configuration for the R2 state machine is added, so that mappings between logical commands and physical commands can be changed by changing configurations without adding logical commands.
  5. Run the mgr2user add command (for H.248 protocol) or sipr2user add command (for SIP protocol) to add an R2 user.
  6. (Optional) Run the mgr2user attribute set command (for H.248 protocol) or sipr2user attribute set command (for SIP protocol) to set the priority of R2 users. When congestion occurs, packets of the user with a high priority is forwarded first.


For example, configure R2 users at the 0/2/1 port when using SIP protocol. Parameters are shown in Table 1-50.

Table 1-50 Data plan for R2 user configuration

Configuration Item


R2 profile


Signaling type of the R2 profile





300 ms

SIP interface


Subrack ID/slot ID/port number


The terminal priority of an R2 user


huawei(config)#r2 profile 0
  Are you sure to add r2 profile?(y/n)[n]:y
huawei(config-r2-0)#profile attribute name normal signaling-type 10
huawei(config-r2-0)#line-signaling attribute wait-answer-time 200 wait-protect-time 300
huawei(config)#esl user
huawei(config-esl-user)#sipr2user add 0/2/1 0 0
huawei(config-esl-user)#sipr2user attribute set 0/2/1 priority cat2
Updated: 2019-02-22

Document ID: EDOC1100067358

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