Voice Is No Longer a Trusted Channel by Default
Enterprise-grade protection against spam, spoofing, robocalls, and voice-based fraud — built directly into your voice network.
For years, organizations treated voice as inherently safe. Today, that assumption no longer holds.
Business voice traffic is increasingly targeted by:
- Robocalls and spam campaigns
- Spoofed and masked caller IDs
- Voice phishing (vishing) attacks
- AI-generated voice impersonation
These threats don’t just waste time — they expose organizations to financial loss, data compromise, and reputational damage. Traditional call blocking tools operate at the endpoint and rely on users to identify threats. That approach is no longer sufficient.
It’s Like a Firewall for Your Voice Traffic
The Voice Security Problem
Modern threats require a new approach to securing voice communications.
A Firewall for Your Voice Traffic
Multi-Layered Defense Built for Modern Threats
CallTower Spam Blocking powered by Mutare secures inbound voice traffic at the network level, stopping threats before they ever reach users, devices, or systems.
Rather than asking employees to decide which calls are safe, this solution applies enterprise-grade security logic automatically — similar to how a firewall protects your data network.
CallTower Spam Blocking uses multiple intelligent layers working together to evaluate, challenge, and stop unwanted calls in real time.
Each inbound call is analyzed using a combination of authentication, global intelligence, and customizable policies — ensuring only legitimate calls reach your teams.
The Result
- Fewer disruptions
- Reduced fraud risk
- Restored trust in voice communications
How It Works (Overview)
Step 01 – STIR/SHAKEN
Analyzes STIR/SHAKEN attestation scores in call data for evidence of suspected call spoofing.
Step 02 – Proprietary Dynamic Database
Integrates data from worldwide resources to identify known spam, scam, spoofing, and robocalls.
Step 03 – CAPTCHA
Extra layer of vetting that challenges callers to enter random digits before the call is completed.
Step 04 – Custom Rules
Creates organization-specific custom rules directing filtering actions for matching calls.
The Technology Behind the Protection
Step 01 – STIR/SHAKEN
Analyzes attestation scores to detect caller ID spoofing and forged identities.
Step 02 – Proprietary Dynamic Database
Uses global intelligence sources to identify spam, scam, spoofing, and robocall activity in real time.
Step 03 – Voice CAPTCHA
Challenges suspicious callers with digit entry to stop automated and malicious activity.
Step 04 – Custom Rules
Enables organizations to define call-handling policies based on business needs.
Why It Matters — Secure Every Conversation
Business Benefits
- Block unwanted calls before they interrupt teams
- Reduce fraud exposure and operational disruption
- Improve productivity by eliminating call-based noise
- Centralize control of enterprise voice security
- Reinforce voice as a trusted communication channel
CallTower Spam Blocking powered by Mutare gives organizations confidence that every inbound call meets their security standards — before it ever rings.
Voice is too important to leave unprotected.
