Salesforce telephony integration is the process of connecting Salesforce with telephony systems, such as call centers or phone systems. 

This integration allows businesses to streamline their communication processes by enabling features such as click-to-dial, screen pop-ups with customer information, call logging, and call routing based on customer data in Salesforce. 

By integrating Salesforce with telephony systems, businesses can improve their customer service and sales operations. Additionally, call data can be automatically logged into Salesforce, providing a comprehensive view of customer interactions, and improving data accuracy.