Intra-office calls on the device used as the IP PBX are normal, but calls between two devices fail to be connected. Why

1

This fault is often caused by the incorrect configuration.

Perform the following operations:
1. Check whether the country code and area code at both ends are consistent.
2. Check whether users, prefixes, enterprises that trunks belong to, and DN sets at both ends are consistent.
3. Check whether the prefix configuration is correct, whether call rights are correct, and whether the home area attribute of the call prefix is intra-office.
4. Check whether the inter-office trunk configuration is correct and whether the trunk status is normal.
5. Check whether the call route configuration is correct and whether the inter-office prefix is bound to the trunk group.

Other related questions:
Intra-office calls on the AR used as the IP PBX are normal, but inter-office calls fail to be connected
1. Check whether the country code and area code at both ends are consistent. 2. Check whether users, prefixes, enterprises that trunks belong to, and DN sets at both ends are consistent. 3. Check whether the call prefix is correctly configured, whether call rights are correct, and whether the call attribute of the call prefix is inter-office. 4. Check whether the inter-office trunk configuration is correct and whether the trunk status is normal. 5. Check whether the call prefix is correctly configured and whether the inter-office prefix is bound to the trunk group.

Failed to call intra-office PSTN numbers
The intra-office prefix needs to be configured no matter the PSTN number or short number of an intra-office user will be called. Calling the PSTN number of an intra-office user fails if the intra-office prefix of the PSTN number is not matched. Therefore, configure an intra-office prefix for the PSTN numbers.

What does the intra-office or local attribute of a prefix configured on the U1900 mean?
When the prefix of the called number matches the prefix attribute configured on the U1900, the system searches for the intra-office called number first. If the called number cannot be found, the system routes the call based on the office route selection code. Application scenario: When the first several digits of an intra-office number overlap with those of an external number, a prefix conflict occurs. In this scenario, a local intra-office prefix is used. After a local intra-office prefix is configured, the system searches for intra-office numbers first. If no intra-office number matches the prefix, the system calls the external user.

When a U1981 attendant transfers a call to an intra-office number, does the U1981 check whether the intra-office number is busy or idle?
No.

Outgoing calls can be made, but incoming calls fail to be connected on the AR using a SIP IP trunk. Why
Check whether the incoming prefix is correctly configured. 1. Check whether the remote IP address and port number of the SIP IP trunk are correct. 2. Check whether the configuration is valid. Run the display voice trunk-group trunk-group-name command to check trunk group information. 3. Verify that the local incoming prefix and incoming number change rules are correct. 4. Verify that the peer outgoing prefix and route number change rules are correct.

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