# Outbound Campaign Capacity and Dialing Overview

## 1. Key Definitions

### <span style={{"color":"#b85cfa"}}> Calls Per Second (CPS) </span>

The rate at which outbound calls are initiated. CPS represents the maximum number of call attempts that can be started per second.

### <span style={{"color":"#b85cfa"}}> Channels </span>

The total number of concurrent call sessions that can exist at any given time, including both dialing and connected calls.

### <span style={{"color":"#b85cfa"}}> Call Volume </span>

The total number of calls planned for a campaign over a defined period (daily, weekly, or monthly).

:::note
### Important Notes

* CPS is dependent on the available channel capacity.
* The number of channels is always greater than the CPS value.
* Channels determine the maximum number of parallel calls that can be handled.
:::

**Example**

A telecom provider may allocate **35 CPS with 1,000 channels**. This means:

* Up to **35 new calls** can be initiated every second.
* A maximum of **1,000 concurrent call sessions** can exist at any given time.

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## 2. Dialing Behavior in IraVoice

IraVoice initiates outbound calls at the configured CPS rate (for example, **35 CPS**).

As calls are placed, channels are gradually occupied. With 1,000 available channels and a dialing rate of 35 CPS, channel capacity is typically reached within approximately **30 seconds**.

### When Channel Capacity Is Reached

* New call attempts are placed in a queue.
* Additional dialing resumes only when active channels become available.
* Channel availability is determined by call completion, rejection, or disconnect events.

### Typical Connect Rate

:::note
In India, approximately **35–40%** of dialed calls are answered and connected. Connected calls generally occupy channels longer than unanswered or failed call attempts.
:::
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## 3. Factors Affecting Campaign Throughput

Actual campaign throughput depends on the following factors:

| Factor                  | Description                                                                          |
| ----------------------- | ------------------------------------------------------------------------------------ |
| **Channels**            | Number of calls that can run concurrently.                                           |
| **Call Duration**       | Longer calls keep channels occupied for extended periods.                            |
| **Answer/Connect Rate** | Higher connect rates increase channel occupancy because connected calls last longer. |
| **CPS**                 | Determines how quickly new call attempts can be initiated.                           |

These factors collectively influence the total number of calls that can be processed during a campaign.

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## 4. Regulatory Considerations (TRAI)

According to TRAI regulations:

* **140-series numbers** must be used for telemarketing and promotional calling campaigns.
* **160-series numbers** are generally reserved for transactional and service-related communications.

:::note
[click here](/sandbox/compliance) for more information on TRAI Regulations.
:::
### Impact on Campaign Operations

Regulatory requirements affect:

* Number provisioning and allocation
* Campaign configuration (including permitted calling hours)
* Compliance and governance for outbound dialing activities

Organizations should ensure that the appropriate numbering series is used based on the nature of the communication to remain compliant with TRAI guidelines.