During the call conference configuration, the phone numbers for participating in a conference are configured on the business management unit (BMU). Outer-office phones cannot ring. Only intra-office phones ring can be successfully connected to the conference.
Step 1 Run the show subpbx command to check whether OutConfDn is set to the default value 000.
If OutConfDn is set to 000, run the config modify subpbx no 0 OutConfDnxxx command to change the value of OutConfDn to the number format that is valid for the peer office. In the preceding command, xxx is set to a number without the area code.
Step 2 If the fault persists, contact Huawei technical support engineers.
The possible cause is that the sub-PBX configuration is incorrect.