What Happens Between Dialling a Number and Connecting a Call?

When you dial a phone number, several behind-the-scenes processes occur to ensure a successful connection. Understanding these processes can help businesses optimize call routing, reduce dropped calls, and improve customer experience.

Initial Signal Transmission

The process begins when your phone sends a signal to the network. This signal contains information about the destination number and your phone's capabilities. The network then queries the availability of the destination number.

Signaling System 7 (SS7)

This signal travels through a data network called Signaling System 7 (SS7). SS7 is a critical infrastructure for call routing. It handles the signaling data that allows calls to be established and managed. SS7 is responsible for tasks such as call setup, call routing, and call teardown.

Querying the Destination Number

The network queries the destination number's availability. If the line is busy, the network sends a busy signal back to the caller. If the line is free, the network establishes a voice circuit, allowing the call to proceed.

Establishing the Voice Circuit

Once the destination number is available, the network establishes a voice circuit. This circuit is a dedicated path for the voice data to travel between the caller and the destination. The process of establishing a voice circuit involves several steps, including:

• Allocating resources: The network allocates the necessary resources to establish the voice circuit.
• Setting up the circuit: The network sets up the circuit by configuring the switches and trunks that will carry the voice data.
• Testing the circuit: The network tests the circuit to ensure that it is working properly.

Optimizing Resource Allocation

This process is optimized to avoid unnecessary resource allocation. By only allocating resources when a call is actually being made, the network can reduce costs and improve efficiency. This optimization is particularly important in the context of predictive dialling, where multiple calls are being made simultaneously.

Call Blocking

Services like Call Blocking rely on this signaling system to filter unwanted calls. Call Blocking uses the SS7 network to identify and block calls from specific numbers or areas. This can help businesses reduce the number of unwanted calls they receive and improve the overall quality of their incoming calls.

Predictive Dialling and Cloud Telephony

In the context of predictive dialling and cloud telephony, this process highlights the importance of robust signaling infrastructure. A robust signaling infrastructure can ensure seamless call connections and enhance operational productivity. It can also help businesses to scale their calling operations more easily and efficiently.

Conclusion

Understanding the process of call routing and connection can provide valuable insights for businesses looking to optimize their calling operations. By leveraging the power of SS7 and other signaling systems, businesses can improve call efficiency, reduce dropped calls, and enhance the overall customer experience.

Planning to improve your business calling operations? Get in touch with ProTalk Dialler to discuss your requirements and evaluate the right approach.

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