How do I change the monthly cost ? Your monthly cost will be made up of a number of factors. Phone system rental (per channel). Any optional free call bundles. Any inbound phone numbers (DID's) Call/SMS charges which you make that aren't in a bundle. The most effective way of reducing costs is adding a call bundle or changing capacity. To do this; Login to your account. On the menu select Account > Supplements > Line Capacity/Rental You can now adjust the cost using the slider and/or radio buttons (remember changing capacity will change how many calls you can handle at the same time). The new cost will be presented on screen.