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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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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).
3G Calls Failed After Dialing Parameters Were Correctly Set

3G Calls Failed After Dialing Parameters Were Correctly Set

Common Causes

This fault is commonly caused by one of the following:

  • The 3G modem is not functioning properly for some reasons such as improper installation of the 3G modem.
  • The SIM card on the 3G modem is not functioning properly. The possible reasons are as follows: the SIM card is not inserted properly; the SIM card needs to be unlocked using PUK; the SIM card is suspended due to arrears.
  • The AR installed with a 3G card is not in the 3G coverage area.
  • The profile is not correctly configured on the 3G modem when a WCDMA network is used.

Troubleshooting Flowchart

Figure 15-7 shows the troubleshooting flowchart for 3G calls.

Figure 15-7  Troubleshooting flowchart for 3G calls

Troubleshooting Procedure

Context

NOTE:

The AR supports WCDMA and CDMA2000, but does not support TD-SCDMA.

Saving the results of each troubleshooting step is recommended. If troubleshooting fails to correct the fault, you will have a record of your actions to provide Huawei technical support personnel.

Procedure

  1. Run the display interface cellular interface-number command.

    <Huawei> display interface cellular 0/0/0
    Cellular0/0/0 current state : UP                                                
    Line protocol current state : UP (spoofing)                                     
    Description:HUAWEI, AR Series, Cellular0/0/0 Interface                          
    Route Port,The Maximum Transmit Unit is 1500                                    
    Internet Address is negotiated, 192.168.70.94/32                                
    Link layer protocol is PPP                                                      
    LCP opened, IPCP opened                                                         
    Last physical up time   : 2011-06-08 10:53:15                                   
    Last physical down time : 2011-06-08 10:53:13                                   
    Current system time: 2011-06-08 11:35:23                                        
    USB Modem State: Present                                                        
    Last 300 seconds input rate 555 bytes/sec, 4440 bits/sec                        
    Last 300 seconds output rate 0 bytes/sec, 0 bits/sec                            
        Input: 87205 bytes                                                          
        Output:6760917 bytes                                                        
        Input bandwidth utilization  : 0.00%                                        
        Output bandwidth utilization : 0.00%   
    
    • If the Modem State value in the command output is Not present, the 3G modem is not installed properly, and it needs to be reinstalled.
    • The value Present indicates that the 3G modem is functioning properly. Go to step 2.

  2. Run the display cellular interface-number all command.

    If the following information is displayed, the 3G network is available. Go to step 3.

    Network Information.                                                            
    ====================                                                            
    Current Service Status = Service available                                      
    Current Service = Combined                                                      
    Packet Service = Attached                                                       
    Packet Session Status = Active                                                  
    Current Roaming Status = Roaming                                                
    Network Selection Mode = Automatic                                              
    ......

    If the network is unavailable, for example, the Current Service Status value is No service or Emergency, or the Packet Service value is Detached, perform the following operations:

    • Run the plmn auto command in the 3G modem interface view to set the PLMN selection mode to automatic.
    • For a WCDMA network, run the mode wcdma wcdma-precedence command in the 3G modem interface view. For a CDMA2000 network, run the mode cdma hybrid command in the 3G modem interface view.

  3. Check whether the SIM card is working properly.

    1. Confirm with the network carrier: ensure that the 3G Internet access service has been enabled and the SIM card does not have arrears.
    2. Run the display cellular interface-number all command.

      Command Output Solution

      If the following command output is displayed, the SIM card is working properly.

      PIN Verification = Disabled      
      PIN Status = Ready                     
      Number of Retries remaining = 3        
      SIM Status = OK       
      Go to step 4.

      If the following command output is displayed, no PIN code is entered.

      PIN Verification = Unknown      
      PIN Status = PIN Requirement    
      Number of Retries remaining = 3     
      SIM Status = Invalid   
      

      Run the pin verify [ auto ] command in the 3G modem interface view.

      NOTE:

      If incorrect PIN codes are entered three times consecutively, the PIN code is locked. Enter a PUK code to unlock it.

      If the following command output is displayed, a PUK code is required.

      PIN Verification = Unknown   
      PIN Status = PUK Requirement    
      Number of Retries remaining = 10    
      SIM Status = Invalid 
      

      Run the pin unlock command in the 3G modem interface view.

      If the following command output is displayed, no SIM card is available on the 3G modem.

      PIN Verification = Unknown       
      PIN Status = Unknown           
      SIM Status = Not insert   
      

      Remove the data card from the 3G modem and insert the SIM card. After the SIM card is installed properly, insert the data card.

      NOTE:

      The SIM card is not hot swappable.

      Wait about 1 minute until the data card completes initialization. If a 3G call still fails, go to step 4.

      NOTE:

      There are two ways to initiate dialing:

      • Triggered by data traffic: For example, when you attempt to open a web page, data traffic is transmitted to the 3G interface. The 3G interface then triggers dialing.
      • Automatic dialing: If you run the dialer number *99# autodial (WCDMA) or dialer number #777 autodial (CDMA2000) command in the interface view, the system automatically connects to the 3G network.

  4. Check whether the AR installed with a 3G card is in the 3G coverage area.

    Use another 3G device, such as a 3G mobile phone, to check whether the 3G signal is normal.

    • If the 3G mobile phone cannot receive wireless signals, the phone is out of the 3G network coverage area. Check that the Radio Access Network (RAN) is working properly.
    • If the 3G mobile phone successfully makes a call, go to step 5.

  5. If a WCDMA network is used, check whether the profile is properly configured on the 3G modem.

    Run the display cellular interface-number all command. If the following information is displayed, no 3G modem profile is configured. Configure a 3G modem profile on the AR.

    Profile Information.                                                            
    ====================                                                            
    Profile 1 = UNDEFINED                                                           
    --------                                                                        
    * - Default profile                
    

    Run the apn profile profile-name command in the system view to create an APN profile. The APN is provided by your carrier.

  6. Collect the following information and contact technical support personnel.

    • Results of the preceding troubleshooting procedure
    • Configuration files, log files, and alarm files of the AR

Troubleshooting Procedure (for Huawei Engineers Only)

NOTE:

If you cannot rectify the fault after performing the preceding troubleshooting procedure, perform the operations in this section.

Procedure

  1. Enable DCC debugging and dial up. Collect the debugging information and contact Huawei technical support personnel.

    NOTE:

    Run the terminal monitor and terminal debugging commands to display debugging information on the terminal. After debugging, run the undo debugging all command to disable it immediately.

    Command

    Functions

    debugging dialer all

    debugging dialer info

    Enables a dialup event and displays debugging information.

    debugging ppp lcp all

    Enables PPP LCP debugging.

    debugging ppp ipcp all

    Enables PPP IPCP debugging.

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Updated: 2019-05-10

Document ID: EDOC1000079719

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