Call Monitoring
Learn how to monitor phone calls for training, quality assurance, and coaching purposes using listen, whisper, barge, and takeover features—designed for supervisors, managers, and team leads.
⏱️ Estimated Time: 10 minutes
👤 Who's This For
Supervisors, managers, trainers, and quality assurance personnel who need to monitor team members' calls for coaching, training, or compliance purposes.
💼 Use Case
Essential for contact center supervisors coaching agents, sales managers training new reps, quality assurance teams evaluating call handling, and managers supporting team members during difficult customer interactions.
✅ Prerequisites
Active Zoom Phone license
Admin must enable call monitoring and add you to a monitoring group
Desktop app, mobile app, or supported desk phone
Team members assigned to you for monitoring
Note: Call monitoring is not enabled by default—admins enable call monitoring and then add groups that can use monitoring features .
Understanding Call Monitoring
Call monitoring allows designated users to listen to, interact with, or take control of ongoing calls for training and quality purposes.
Who can monitor:
Supervisors and managers (for their team members)
Call queue administrators (for queue calls)
Shared line group members (for each other)
Executives and assistants (in delegation setups)
Who can be monitored:
Phone users assigned to monitoring groups
Call queue members during queue calls
Common area phones
Shared line group members
Call Monitoring Features
Listen (Silent Monitoring)
What it does:
You hear both sides of the conversation
Neither party hears you
You remain completely silent on the call
Best for:
Quality assurance evaluations
Assessing agent performance
Identifying training needs
Compliance monitoring
Whisper (Coach Mode)
What it does:
You hear both sides of the conversation
Only the monitored person hears you
The caller doesn't hear your coaching
Real-time coaching during active calls
Best for:
Training new team members
Providing guidance during difficult calls
Offering immediate feedback
Helping with complex customer issues
Barge (Conference In)
What it does:
You join the call as a third participant
All parties hear each other
Full three-way conversation
Best for:
Escalations requiring supervisor intervention
Complex technical issues needing expert input
Customer requests to speak with a manager
Emergency situations requiring immediate help
Takeover (Transfer)
What it does:
You take complete control of the call
The original agent is removed from the call
You continue one-on-one with the caller
Best for:
Escalations that require full ownership
Removing struggling agents from difficult situations
Handling VIP customers personally
Crisis management
Using Call Monitoring
Desktop App
Desk Phone
After admin sets up call monitoring, a line key called BLF (Monitoring) is automatically added to your line key settings, allowing you to see the call status of phone users you can monitor .
🎮 Click-Through Demo
▶️ Watch: Using Call Monitoring Features See how to monitor calls, switch between modes, and coach team members effectively.
Call Monitoring Notifications
For the monitored person:
May hear a disclaimer prompt when monitoring begins (if enabled by admin)
Notification depends on admin settings
Some organizations notify agents, others use silent monitoring
For the caller:
Typically hears no notification for listen or whisper
Hears entry tone when supervisor barges into call (if enabled)
May hear prompt at call start: "This call may be monitored for quality assurance"
Best Practices for Monitoring
Set clear expectations:
Inform team members they may be monitored
Explain monitoring is for training and improvement
Establish regular monitoring schedule
Use whisper sparingly:
Only coach when necessary—constant whispering distracts agents
Wait for appropriate moments to provide guidance
Keep whisper comments brief and actionable
Barge thoughtfully:
Announce yourself professionally: "Hi, this is [Name], I'm joining to assist"
Explain reason for joining: "I wanted to help with your technical question"
Support your agent, don't undermine them
Takeover as last resort:
Only use for escalations, VIP situations, or emergencies
Briefly tell agent why you're taking over
Debrief with agent after the call
Document what you observe:
Take notes during monitoring sessions
Capture both strengths and improvement areas
Use observations in coaching conversations
Provide timely feedback:
Debrief immediately after monitored calls
Balance positive recognition with constructive feedback
Focus on specific behaviors, not personal criticism
Monitoring Different Call Types
Call Queue Monitoring
Account owners and admins can enable or disable call monitoring, then add groups that can use monitoring features .
Call queue admins can monitor queue members
Monitor any call involving queue extensions or direct numbers
Helps ensure consistent service levels
Great for real-time quality assurance
Shared Line Monitoring
Shared line group members can monitor each other
Useful for collaborative teams
Supports peer coaching
Builds team capabilities
Delegation Monitoring
Executives and assistants can monitor each other
Ensures seamless handoffs
Helpful for training new assistants
Maintains quality standards
💡 Pro Tips
See Details
Schedule announced monitoring sessions Tell agents "I'll be monitoring 3 calls today between 2-4pm" so they're prepared and it feels fair.
Start with listen before whisper Assess the full situation before intervening. You might not need to whisper if the agent handles it well.
Use whisper for positive reinforcement too Don't just correct mistakes—whisper "Great job handling that objection" to build confidence.
Create monitoring scorecards Standardize what you're evaluating so feedback is consistent across your team.
Rotate monitoring focus One week focus on opening scripts, next week on closing techniques—helps agents improve specific skills.
Barge with context When joining, briefly state why: "I heard you mention our enterprise plan—I can provide pricing details."
⚠️ Common Issues
See Details
Can't see monitored users in Lines tab? → Your admin hasn't added you to a monitoring group. Request access from your Zoom Phone administrator.
Monitoring option grayed out? → The user may not be on an active call, or they're on a call that cannot be monitored (personal call, external conference).
No audio when listening to a call? → Check your device audio settings. Ensure your speaker volume is up and the correct output device is selected.
Monitored person can hear me during "listen" mode? → Your microphone may be active. Verify you're in listen mode (not whisper or barge) and mute your mic.
Desk phone monitoring keys not appearing? → Your desk phone may need to reboot after admin adds you to monitoring group. Power cycle your phone.
Can't switch back to whisper after takeover? → This is by design—takeover is permanent. You cannot return to other monitoring modes once you take over a call.
🎯 What's Next
✨ You're now equipped to monitor calls! You can:
Monitor team members' calls in real-time
Use listen mode for silent quality assurance
Provide coaching with whisper mode
Join calls with barge when needed
Take over calls for escalations
Switch between monitoring modes strategically
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