--- title: "VOIP Call Capacity - DID+0 and DID+2 numbers modes | DIDWW" description: "The most cost-efficient VoIP call capacity with DID+0 and DID+2 number modes. Choose the right option for you - Flat-rate, Pay-Per-Minute, or Hybrid." canonical: "https://www.didww.com/services/capacity" last_updated: "2026-10-15T14:39:14.228Z" --- # VOIP Call Capacity - DID+0 and DID+2 numbers modes | DIDWW > The most cost-efficient VoIP call capacity with DID+0 and DID+2 number modes. Choose the right option for you - Flat-rate, Pay-Per-Minute, or Hybrid. Virtually unlimited concurrent calls to support your business needs [Sign up now](https://my.didww.com/#/users/sign_up) [Talk to an expert](https://www.didww.com/request-a-demo) ## Why is the DIDWW call Capacity solution unique? ### Cost-efficient pricing Multiple inbound VoIP call Capacity billing modes to satisfy any use case. - ### No long-term commitments Complete freedom to instantly adjust voice Capacity configurations and volumes to suit your current and future requirements. - ### Free unlimited outbound Capacity Competitive outbound rates with no additional charges for voice channels. - ### Free unlimited inbound Capacity Toll Free and Shared Cost Numbers supporting unlimited inbound concurrent calls. - ### Instant self-service management Effortless and flexible live Capacity configuration management, providing adaptability for all business needs. - ### Flexible configuration options Scalable Capacity groups shared among multiple phone numbers, sub-customers and locations worldwide. - ### Hybrid Capacity for maximum availability Pay-per-minute Capacity option as a backup for flat-rate channels to handle traffic peaks. ### Hybrid Capacity for maximum availability Pay-per-minute Capacity option as a backup for flat-rate channels to handle traffic peaks. ### Cost-efficient pricing Multiple inbound VoIP call Capacity billing modes to satisfy any use case. ### No long-term commitments Complete freedom to instantly adjust voice Capacity configurations and volumes to suit your current and future requirements. ### Free unlimited outbound Capacity Competitive outbound rates with no additional charges for voice channels. ### Free unlimited inbound Capacity Toll Free and Shared Cost Numbers supporting unlimited inbound concurrent calls. ### Instant self-service management Effortless and flexible live Capacity configuration management, providing adaptability for all business needs. ### Flexible configuration options Scalable Capacity groups shared among multiple phone numbers, sub-customers and locations worldwide. ### Hybrid Capacity for maximum availability Pay-per-minute Capacity option as a backup for flat-rate channels to handle traffic peaks. ### Cost-efficient pricing Multiple inbound VoIP call Capacity billing modes to satisfy any use case. ### No long-term commitments Complete freedom to instantly adjust voice Capacity configurations and volumes to suit your current and future requirements. ### Free unlimited outbound Capacity Competitive outbound rates with no additional charges for voice channels. ### Free unlimited inbound Capacity Toll Free and Shared Cost Numbers supporting unlimited inbound concurrent calls. ### Instant self-service management Effortless and flexible live Capacity configuration management, providing adaptability for all business needs. ### Flexible configuration options Scalable Capacity groups shared among multiple phone numbers, sub-customers and locations worldwide. ### Hybrid Capacity for maximum availability Pay-per-minute Capacity option as a backup for flat-rate channels to handle traffic peaks. ## DID+0 and DID+2 virtual number modes Enjoy the freedom of automatically including inbound channels with phone numbers, or benefit from the flexibility of setting up your own unique Capacity models. ### DID+0 Local, National and Mobile Numbers with no voice channels included. ### DID+2 Local, National and Mobile Numbers bundled with two dedicated voice channels. ## Build your own Capacity model with additional voice channels DIDWW Capacity modes for maximum flexibility and efficiency ### Flat-rate Flat-rate voice channels are designed for customers with predictable call volumes. Channels may be instantly assigned or unassigned from single DID or group of DIDs. There are no per-minute charges for calls using the flat-rate option, instead, there is a fixed volume-based monthly charge per channel which can be cancelled any time. ### Pay-per-minute Pay-per-minute channels provide a useful and cost-effective solution for customers with unpredictable volumes of simultaneous calls. Users can easily define the maximum number of simultaneous calls per single DID or group of DIDs, thereby controlling the incoming call load. There are no setup or monthly charges for pay-per-minute channels, instead, a low global per-minute rate applies. ### Hybrid Hybrid capacity incorporates both options, combining the benefits of including flat-rate channels for predictable volumes of simultaneous calls and pay-per-minute channels as a reliable backup for sudden high call demands. This unique voice Capacity mode ensures that no calls are missed and allows users to manage call volumes in a cost-efficient manner. ## Achieve maximum flexibility with VoIP Capacity groups Capacity groups provide a cost-efficient approach to manage your Capacity and ensures that your projects are maintained in separate groups, determined by company, region or any other required parameter. A set of voice channels may be shared amongst a number of DIDs, separated by virtual Capacity groups. DIDWW users can easily manage and build groups suited for any usage model to achieve maximum flexibility and availability. ## Request a quote Get an offer tailored for your business [Get your quote](https://www.didww.com/request-a-quote) ## Frequently Asked Questions ### What’s the difference between dedicated, shared, and metered channels? DIDWW Capacity comes in two billing models: flat-rate and pay-per-minute (metered). Flat-rate channels can be dedicated (reserved for one DID) or shared (pooled across a Capacity group). Metered channels are pay-per-minute and can be assigned to a single DID or pooled across a group, used only once higher-priority channels are unavailable. ### In what order does DIDWW use my available Capacity? Included channels first, then dedicated, then shared, then metered. If none are available, the inbound call can’t be delivered. This priority order is fixed. ### What happens if my Capacity is exceeded? If no configured channel is available when a call arrives, it can’t be delivered through Capacity resources. Usage reports in the [User Panel](https://my.didww.com/#) help you spot when to add channels. ### Can I combine flat-rate and pay-per-minute channels on the same number? Yes, this is Hybrid Capacity. Flat-rate channels handle predictable traffic while metered channels absorb overflow during peak periods, all managed through the same Capacity configuration. ### Can Capacity be shared across multiple phone numbers? Yes, through a Capacity group. Shared and metered channels assigned to a group are available to every DID in it.