Our call barring feature allows you to block calls to chosen destinations on a per extension basis.
By default, all customers (and extensions) are able to call UK numbers and certain low cost international destinations. For an up to date list of our low cost international destinations please see this page. Any attempt to make a call to any other country will fail, and you will hear a forbidden tone.
If you wish, you can manually allow calls to other destinations of your choice.
Modifying call barring settings
If you wish to create a custom call barring rule, click on Call Barring within the Setup menu in your control panel.
You can base your new rule on an existing rule set if you wish, and the allowed destinations from this rule will be copied to your new rule. This is useful if you only want to make a few changes. By default, Gradwell have two rules pre-configured - UK and low cost international and UK only.
Alternatively, you can use [blank], which will give you a blank canvas to start from. Do bear in mind that using this will mean ALL calls would be barred until you allow destinations.
Enter a name for reference and click Create. Your new rule will appear and you can click edit to configure it.
Configuring a rule is simple. You will see a list of destinations, and to enable (or disable) calls to that destination simply click the box alongside it. So in the example below, calls to Kazakhstan would be barred, but calls to Russian numbers would be allowed. If you need to add more specific rules, for example restrict calls to a certain area code within a country, simply click the add... link and enter the area code.
Click Save to apply your changes to the rule set.
If you find it easier, you can also view destinations alphabetically or enter area codes manually using the view as text option.
Setting a preferred maximum call cost
If you wish you can also set a preferred maximum call cost to a particular destination.
Even within countries the cost to call it will vary based on region, meaning that in some countries the majority of area codes and destination types can be relatively cheap to call, but particular areas can be much more expensive. To prevent you getting a shock when you enable calls to a country, you can adjust the amount that you are happy to pay. Any calls above this amount will be barred, yet cheaper calls will still connect successfully.
The default global amount that we set is 20 pence per minute, but to edit this click the max cost link alongside the destination. This opens another box that allows you to configure the preferred maximum call cost.
This box will also show you the current minimum and maximum call cost. To enter your own preferred cost, enter it in the box.
Please note that tariff costs do change from time to time, however the figure that you enter here will not update automatically. So if calls to a number that have routed successfully in the past suddenly stop working, you may find that it's because the costs to call it have risen significantly enough to push it above your preferred maximum call cost.
You can set a higher preferred maximum than the current highest call charge, however this is at your own risk.
Applying call barring rules to extensions and trunks
There are two ways of applying call barring rules to extensions and trunks. To apply it to several at once, it's easiest to do it from the rule editor page. On the right hand side you'll see a list of all extensions and trunks, and you need to simply select the ones you wish to apply to the rule to and click Save.
To modify an individual extension, simply navigate to it on the Extensions page and scroll to PSTN/Billing Settings. Select the required call barring rule from the dropdown box and click Save.
Setting a default rule
If you wish for a customised rule to be used as default for all new extensions and trunks that you create, navigate to Call barring and select Default alongside the rule.
Please note that this only affects any new extensions or trunks, and not all. If you wish to apply the rule to existing trunks too click edit and apply there. You can use the Select all button to make this process easier if you have a lot of extensions and trunks.
If you delete any call barring rules that are being used by extensions or trunks, they will revert to using this default rule.
If you delete the default rule itself the global default (UK and low cost international) will be used instead.
Deleting a call barring rule
To delete a call barring rule you have created, simply navigate to Call barring and click the delete link alongside it.
Any extensions or trunks using this rule will revert to using the default rule.
When a call is made to a blocked destination you will see a warning when you log in to the control panel.
It may be that someone made a call to a destination without realising that it was blocked. However, it could also be a sign that someone has compromised your account. To view more details click the link in the warning message.
You will be presented with details of all the blocked calls made, including the extension or trunk that attempted the call and the destination. If the call was barred in error, click the allow link next to the blocked call.
You will have the option to enable the whole number (allowing future calls to that specific number only), part of the number (which could enable calls to an organisation with a certain number range) or the whole area code/country.
You can also choose whether to allow this destination for just that specific extension, or to all extensions using the same rule set. If you choose to allow the destination for one specific extension a new rule will be created and assigned to that extension.
If an attempted call has been blocked and you are unsure whether the call originated from within your organisation, it may be prudent to change the password on that extension as a precaution. You can do this from the Extensions page.
Blocking all external calls
If an extension is only required for internal calls you can easily block all outbound calls by turning off PSTN Access on the extension. To do this, navigate to the Extensions page (within the Configure menu of your control panel) and select the extension you wish to configure. Scroll to PSTN/Billing Settings and look for PSTN Access.
Untick this box and click Save. The extension will now only be able to make internal calls by dialling the local seven digit extension number.
Blocking inbound calls
This article only covers blocking outbound calls. If you need to also control inbound calls please use our caller ID routing functionality.