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Voice Feature Guide 01

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Configuring Inner Standalone (H.248-based or SIP-based)

Configuring Inner Standalone (H.248-based or SIP-based)

This topic describes how to configure the inner standalone. After the inner standalone is configured, the internal phones can call each other using the internal extension numbers even if the interface between the gateway and the softswitch is interrupted.

Context

  • The MG interface supports the inner standalone function only when it uses the H.248 protocol.
  • When the MG interface works in the inner standalone state, only the internal users of the MG interface can communicate in the normal state.
  • To maintain the same user phone number in the standalone state as the one used in normal condition, configure the phone number on the MG to be the same as that on the MGC.

Prerequisite

  • The voice service users are configured properly on the H.248/SIP interface and the users can call each other successfully.
  • The user phone number of the H.248 interface/SIP interface is configured to be the same as that on the softswitch. (Command: mgpstnuser modify (H.248 interface)/sippstnuser modify (SIP interface)).

Procedure

  • Configure inner standalone (based on H.248 protocol)
    1. Run the mg-software parameter 11 1 command to configure the MG interface to support the inner standalone function.
    2. Run the digitmap set inner command to configure the internal digitmap.

      NOTE:

      The configured digitmap should correspond to the user phone number.

    3. (Optional) Run the standalone parameters command to configure the inner standalone timers.

      • The inner standalone timers include the dial tone timer (default: 10s), the busy tone timer (default: 40s), and the ringing tone timer (default: 50s).
      • Generally, the default inner standalone timers can be used.

  • Configure inner standalone (based on SIP protocol)
    1. Run the mg-software parameter 2 1 command to configure the SIP interface to support the inner standalone function.

      By default, the SIP inner standalone function is disabled.

    2. (Optional) Run the local-digitmap add command to add a digitmap used in SIP inner standalone.

      The system has a digitmap named defaultnormal, which can match any phone numbers. Therefore, a new digitmap does not need to be added unless otherwise required.

Example

Assume that an incoming third-party call will interrupt the inner standalone call after the communication between MG 0 and the MGC recovers. To configure MG 0 to support the inner standalone, and set the internal digitmap to 1234xxxx, do as follows:

huawei(config)#interface h248 0
huawei(config-if-h248-0)#mg-software parameter 11 1
huawei(config-if-h248-0)#display mg-software parameter 11                  
  -------------------------------------------------                             
  Interface Id:0           para index:11  value:1                               
  -------------------------------------------------                             
 APPENDIX:                                                                      
  -------------------------------------------------                             
   Interface software parameter name:                                           
   11: Stand alone support                                                      
       0: None                                                                  
       1: Inner                                                                 
       2: Emergency                                                             
       3: Both                                                                  
huawei(config-if-h248-0)#digitmap set inner 1234xxxx      
huawei(config-if-h248-0)#display digitmap                                  
  ----------------------------------------------------------------------------- 
  Inner digitmap                                         : 1234xxxx             
  Emergency digitmap                                     : -                    
  Urgent digitmap (for overload or bandwidth restrict)   : -                    
  Dualdial digitmap for card service                     : -                    
  ----------------------------------------------------------------------------- 

To configure SIP interface 0 to support the inner standalone (so that the internal phones whose numbers belong to the number segment of 07552856xxxx can call each other, if the communication between SIP interface 0 and the softswitch is interrupted), do as follows:

huawei(config)#display local-digitmap name defaultnormal
                                                                                
  Command:                                                                      
          display local-digitmap name defaultnormal                             
  ------------------------------------------                                    
  Name: defaultnormal                                                           
  Type: normal                                                                  
  Body: x.S|Exx.S       //can match any phone numbers
  ------------------------------------------ 
huawei(config)#interface sip 0
huawei(config-if-sip-0)#mg-software parameter 2 1
huawei(config-if-sip-0)#display mg-software parameter 2
  -------------------------------------------------                             
  MGID:0           para index:2   value:1                                       
  -------------------------------------------------                             
 APPENDIX:                                                                      
  -------------------------------------------------                             
 Parameter Index:  Interface software parameter name:                           
    2 : SAL Support                                                             
        0: No                                                                   
        1: Yes                                                                  
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Updated: 2019-02-22

Document ID: EDOC1100067358

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