This article provides solutions for common Bitrix24 Telephony issues when making outbound calls.

What to do if outbound calls fail

If an outbound call is unable to go through, you will see the following error in the active call form:

To identify the reason for the error, follow these steps:

1. Navigate to CRM > Add-ons > Telephony.

2. Open the Call details tab.

3. Find the unsuccessful call on the list and click on the book icon under Details to view the call log.



Cannot see the Details column

If you don't see the Details column, do the following:

1. Click on the gear button.

2. Tick Details in the list view settings.

3. Then click Apply.


Learn how to get call logs

4. Scroll down to the bottom of the page to check what error is shown next to Call reason.

See the description of each error provided below.

Issues when calling from rented numbers

If you are unable to place an outbound call from the rented number, it may be because:

1. Your balance is too low. If you have not paid the monthly fee for the rented number, you will see Forbidden. Not active in the call log.

   

   Make sure you have enough credits to pay for your number under CRM > Add-ons > Telephony > Connection > Balance & Statistics.

   Also, you can click Configure in the top right corner to check when the rent is due.

   

   If there is a current or earlier date, your rent number subscription is not renewed.

   

   Top up your telephony account balance to enable outbound calls.

   Learn how to top up your balance

2. You didn't upload the documentation required, or it wasn't approved. In some countries, it is required by law that a telephone company request legal documentation from you before you can use your rented numbers. If you haven't uploaded documents or they were rejected, you will see Forbidden. Can’t be used in the call log.

   

   Check the status of your documents under CRM > Add-ons > Telephony > Upload documentation.

   

   Here, you can also upload new documents if the previous ones were rejected.

   

Issues when calling from SIP PBXs

If outbound calls do not go through when calling from your SIP PBX, it may be because of:

1. Inactive SIP connector subscription. If you are out of free minutes, you will see the corresponding error in the call log: SIP Trial: trial time is over.

   

   Purchase the SIP connector to continue using outbound calls.

   Learn more about the SIP connector

   If you use only inbound calls, you don't need the SIP connector module. However, when forwarding inbound calls to another number, they are considered outbound. The SIP connector is required to use the call forwarding option.

2. Errors on the PBX side. To ensure the issue is on your PBX side, open the call log and check if there is an error with one of the following codes: 403, 404, 480, or 500. Copy the link to the call log from the browser address bar and provide it to your PBX support team to resolve the issue.

   

   The only exception is error code 408. Contact the Bitrix24 Support team for a solution in this case.

Issues not related to your connection type

Sometimes outbound call issues are caused by incorrect telephony settings. See the following cases:

1. There are connection problems. If the system cannot establish the connection (either for outgoing or incoming calls), check the following:

   • Technical requirements for the telephony module.

   • Your firewall may be blocking the traffic. Try to switch off your antivirus system and repeat the call.

   • In case you have a problem with the firewall, make sure that the *.bitrix24.com address is opened. Also, you can check our telephony provider's documentation on this matter.

   • Your browser may be transferring an incorrectly cached file from CDN. Desktop app installation may help.

2. A user does not have access permissions to perform outbound calls. In this case, there will be the following error in the call log: User is not allowed to call number.

   

   Check the telephony access permissions settings and assign this user a role that allows outgoing calls.

   Learn how to configure access permissions to Telephony

3. A phone number is added to Exceptions. If the client's phone number is on the exception list, there will be the same error in the log: User is not allowed to call number.

   Remove the client's number from Exceptions to allow calling them.

   Learn how to manage exceptions in CRM

4. There is no access to the microphone. Allow access to your microphone in the browser settings to avoid the following error:

   

   Note that such failed calls are not registered under Call details.

   We also recommend taking a call quality test after that.

   Learn how to test your telephony connection quality

If you have a different situation, please contact the Bitrix24 Support team via chat. Don't forget to provide the call log with the issue.