Anti-Spam Filtering & Call Blocking are useful features in a business phone system because they help to prevent unwanted and unsolicited calls from reaching employees. These features work by identifying and blocking calls from known spam numbers or using advanced algorithms to determine if a call is likely to be spam.

This can help to protect employees from unwanted interruptions, reduce the risk of phishing or scam attempts, and can improve overall productivity by allowing employees to focus on important calls rather than being distracted by spam or unwanted calls.

Additionally, anti-spam filtering can also help to protect the phone system from being overwhelmed by unwanted calls, which can help to improve system performance and reliability.