How to Troubleshoot Common TSN Phone Calling and Connection Issues

Applies to: Windows 10/11, macOS, iPhone, iPad, Android, Web Browsers, and Compatible Desk Phones
Difficulty: Beginner to Intermediate
Estimated Time: 5–15 minutes

Overview

TSN Phone allows you to make and receive business calls using your computer, mobile device, web browser, or compatible desk phone. Occasionally, you may experience issues such as calls not ringing, audio problems, connection errors, or the application not signing in properly. Many of these issues can be resolved through basic troubleshooting without changing your organization’s phone system configuration. This guide explains how to identify common TSN Phone problems, perform safe troubleshooting steps, and determine when to contact True Synergy Networks for additional assistance.

Before You Begin:

  • Make sure your device is powered on.
  • Confirm that you have an active internet connection.
  • Use the TSN Phone application approved by True Synergy Networks.
  • Know your assigned extension number.
  • Have access to your assigned sign-in method.
  • Check whether your headset, handset, or microphone is connected properly.

Important: Do not factory reset managed desk phones, uninstall provisioned applications, modify SIP credentials, or change network security settings while troubleshooting unless directed by True Synergy Networks.

Note: TSN Phone features and troubleshooting procedures may vary based on your organization’s configuration.

Step 1: Identify the Problem

Before making changes, determine which problem you are experiencing.

Common issues include:

  • Unable to sign in.
  • Application shows Disconnected or Offline.
  • Incoming calls do not ring.
  • Unable to make outgoing calls.
  • Calls immediately disconnect.
  • You can hear the caller, but they cannot hear you.
  • The caller can hear you, but you cannot hear them.
  • Audio cuts out during conversations.
  • Calls disconnect after a short period.
  • Desk phone displays a registration error.
  • Mobile calls only ring when the application is open.
  • Call transfers or voicemail are not working.

Identifying the specific symptom can help you resolve the issue faster.

Tip: If an error message appears, make a note of the exact wording before closing it.

Step 2: Check Your Internet Connection

TSN Phone uses your organization’s telephone service and network connectivity to place and receive calls.

An unstable internet connection can cause:

  • One-way audio.
  • Choppy conversations.
  • Delayed ringing.
  • Dropped calls.
  • Registration errors.
  • Application disconnections.

Windows or Mac

  1. Open your preferred web browser.
  2. Visit a trusted website.
  3. Confirm that the page loads normally.
  4. Check whether your computer is connected to Wi-Fi or Ethernet.
  5. If using Wi-Fi, verify that the connection is stable.

iPhone or Android

  1. Open your device’s Settings.
  2. Check whether Wi-Fi or cellular data is enabled.
  3. Confirm that you have an active connection.
  4. Open a trusted website to test connectivity.

Desk Phone

  1. Confirm that the network cable is securely connected.
  2. Check whether the phone displays a network or registration warning.
  3. Verify that other network-connected devices are working.

Important: Internet browsing working normally does not always guarantee that real-time voice traffic is functioning correctly.

If your internet connection appears normal but telephone calls still fail, continue with the steps below.

Step 3: Check the TSN Phone Connection Status

Your TSN Phone application must be connected to the telephone system to use supported calling features.

Windows or Mac

  1. Open TSN Phone.
  2. Look for your current connection or account status.
  3. Check for warnings such as Disconnected, Offline, or Reconnecting.
  4. Confirm that your assigned extension is displayed.

If the application indicates that it is disconnected:

  1. Check your internet connection.
  2. Close and reopen the application.
  3. Allow it time to reconnect.
  4. Check whether the connection status changes.

iPhone or Android

  1. Open TSN Phone.
  2. Confirm that you are signed into the correct account.
  3. Review any displayed connection warnings.
  4. Switch to a stable, approved internet connection if necessary.
  5. Reopen the application.

Important: Do not repeatedly delete and recreate your account. Account provisioning and server configuration are managed by True Synergy Networks.

Step 4: Restart the Application

Restarting the application can resolve temporary issues.

Windows

  1. Close TSN Phone.
  2. Check whether it remains running in the Windows system tray.
  3. Exit the application completely using its menu.
  4. Reopen TSN Phone.
  5. Confirm that your extension reconnects.

Mac

  1. Open TSN Phone.
  2. Select Quit from the application menu.
  3. Reopen the application.
  4. Confirm that it reconnects.

iPhone or iPad

  1. Open the App Switcher.
  2. Locate TSN Phone.
  3. Close the application.
  4. Reopen it.
  5. Allow time for the account to reconnect.

Android

  1. Open the recent applications screen.
  2. Locate TSN Phone.
  3. Close it.
  4. Reopen the application.
  5. Confirm that your account is connected.

Note: Closing and reopening the application may temporarily interrupt your ability to receive incoming business calls. Only restart when you are not on an active call.

I Cannot Sign In to TSN Phone

If your username or password is not working:

Step 1: Check Your Credentials

  1. Confirm that you are using the assigned username or email address.
  2. Make sure Caps Lock is not enabled.
  3. Check for accidental spaces in the username or password.
  4. Confirm that you are using the approved TSN Phone sign-in page or application.

Step 2: Check Your Sign-In Method

Depending on your organization’s configuration, you may sign in using:

  • Your assigned TSN Phone credentials.
  • Microsoft 365 Single Sign-On.
  • Another organization-approved authentication method.

Follow the sign-in method supplied by True Synergy Networks.

Step 3: Review Any Error Message

If the application displays an error:

  1. Read the message.
  2. Record the exact wording.
  3. Avoid repeatedly attempting incorrect passwords.
  4. Contact True Synergy Networks if you cannot sign in.

Important: If you forgot your password or have an account lockout, contact True Synergy Networks for assistance. Do not use unapproved password reset websites or share your existing password with anyone.

Incoming Calls Are Not Ringing

If your extension is not receiving incoming calls, several settings may be involved.

Step 1: Check Your Availability

  1. Open TSN Phone.
  2. Review your presence status.
  3. Confirm that Do Not Disturb is not unintentionally enabled.
  4. Set your status to Available if appropriate.

Note: Presence settings and actual telephone call routing may operate separately.

Step 2: Check Your Ringing Volume

On a computer:

  1. Open TSN Phone audio settings.
  2. Check your selected Ringing Device, if available.
  3. Confirm that the device is connected.
  4. Increase the volume.
  5. Test the ringing device.

On a mobile device:

  1. Review notification permissions.
  2. Check the device’s sound settings.
  3. Review any Focus or Do Not Disturb settings.

On a desk phone:

  1. Confirm that the phone is registered.
  2. Check the ring volume.
  3. Verify that DND is disabled.

Step 3: Test the Extension

  1. Ask a coworker to call your direct extension.
  2. Check whether your application or desk phone rings.
  3. Determine whether the issue affects all incoming calls or only certain calls.

Important: Calls from departmental ring groups or queues may follow different routing rules than direct extension calls. If direct calls work but departmental calls do not, contact True Synergy Networks.

I Cannot Make Outgoing Calls

If outgoing calls fail:

Step 1: Verify the Telephone Number

  1. Open the dialer.
  2. Enter the complete telephone number.
  3. Confirm the area code is correct.
  4. Use your organization’s approved dialing format.

Step 2: Test an Internal Call

  1. Enter a coworker’s extension number.
  2. Place the call.
  3. Check whether it connects.

If internal calls work but external calls fail, the issue may involve outbound calling permissions or telephone service routing.

Step 3: Review Your Connection

  1. Confirm that TSN Phone is connected.
  2. Check your internet connection.
  3. Review any error messages.
  4. Try another permitted number if appropriate.

If outgoing calls continue failing, contact True Synergy Networks.

Important: Outbound call permissions and telephone trunk configuration are managed by TSN.

I Can Hear the Caller, but They Cannot Hear Me

This is commonly described as a microphone issue or one-way audio problem.

Step 1: Check Mute

  1. Review the active call controls.
  2. Confirm that your microphone is not muted.
  3. Unmute if necessary.

Step 2: Check the Microphone

On Windows or Mac:

  1. Open TSN Phone audio preferences.
  2. Locate the microphone selection.
  3. Select the correct microphone or headset.
  4. Check whether the input indicator responds when you speak.

On iPhone or Android:

  1. Open your device’s application permissions.
  2. Locate TSN Phone.
  3. Confirm that microphone access is allowed.

Step 3: Test Another Device

If possible:

  1. Disconnect your headset.
  2. Select another available microphone.
  3. Place a test call.

If the other person still cannot hear you, contact True Synergy Networks.

Note: If the microphone works in other applications but fails only in TSN Phone, the issue may involve application settings or call connectivity.

The Caller Can Hear Me, but I Cannot Hear Them

If the other party can hear you but you cannot hear them:

Step 1: Check Your Speaker Volume

  1. Increase the volume.
  2. Confirm that your headset or speakers are connected.
  3. Check whether the correct audio output is selected.

Step 2: Review Audio Output

On Windows or Mac:

  1. Open TSN Phone audio settings.
  2. Locate the speaker or output device selection.
  3. Select the intended device.
  4. Play a test sound if supported.

On mobile:

  1. Confirm that audio is not routing to another Bluetooth device.
  2. Check the speaker and headset options.
  3. Adjust the call volume.

Step 3: Test Another Call

  1. End the affected call when appropriate.
  2. Place a test call.
  3. Confirm whether the audio issue continues.

If one-way audio persists, contact True Synergy Networks.

Important: One-way audio can also be caused by network or telephone system issues. Do not change firewall or router settings without authorization.

Calls Sound Robotic, Choppy, or Delayed

Poor audio quality may be caused by network interruptions or unstable connectivity.

Step 1: Check Your Network

  1. Confirm that your internet connection is active.
  2. If using Wi-Fi, move closer to the access point.
  3. Avoid moving between weak Wi-Fi coverage areas during a call.
  4. Check whether other applications are using significant bandwidth.

Step 2: Check Your Headset

  1. Confirm that the headset is connected securely.
  2. If using Bluetooth, verify that the connection is stable.
  3. Try another headset or speaker if available.

Step 3: Compare Calls

  1. Determine whether the problem affects every call.
  2. Check whether coworkers experience similar issues.
  3. Record the approximate times when audio problems occur.

If audio quality remains poor, contact True Synergy Networks.

Note: Real-time telephone conversations are sensitive to latency, packet loss, and network jitter, even when websites load normally.

Calls Disconnect After a Short Period

If calls end unexpectedly, note whether they disconnect after a similar amount of time on each attempt.

Step 1: Record the Pattern

For example:

  • Disconnects after approximately 30 seconds.
  • Disconnects after several minutes.
  • Disconnects only when answering external calls.
  • Disconnects only on Wi-Fi.
  • Disconnects when switching networks.

Step 2: Check Connectivity

  1. Verify that your internet connection is stable.
  2. Avoid switching between Wi-Fi and cellular data during active calls.
  3. Test another approved network if available.
  4. Try a new call.

Step 3: Contact Support

If calls repeatedly disconnect:

  1. Record the date and time.
  2. Note whether the call was incoming or outgoing.
  3. Record the destination number when appropriate.
  4. Contact True Synergy Networks.

Important: Repeated disconnections at consistent intervals may require investigation of network equipment, SIP signaling, or media connectivity by TSN.

My iPhone Is Not Ringing When TSN Phone Is Closed

Mobile applications rely on operating system notification services to alert you to incoming calls while the application is in the background.

Step 1: Check Notifications

  1. Open Settings.
  2. Select Notifications.
  3. Locate TSN Phone.
  4. Confirm that Allow Notifications is enabled.
  5. Review sounds, banners, and Lock Screen notification settings.

Step 2: Check Focus

  1. Open Settings.
  2. Select Focus.
  3. Review any active Focus modes.
  4. Confirm that TSN Phone notifications are not unintentionally suppressed.

Step 3: Test an Incoming Call

  1. Open TSN Phone and confirm that you are signed in.
  2. Lock your iPhone.
  3. Ask a coworker to call your extension.
  4. Confirm that the incoming call notification appears.

Important: Do not repeatedly force-close TSN Phone as a normal troubleshooting workaround. iOS may limit background behavior after an application is manually terminated. If incoming calls still do not appear, contact True Synergy Networks.

My Android Phone Only Rings When the App Is Open

Android devices may restrict background applications to conserve battery power.

Step 1: Check Notifications

  1. Open Settings.
  2. Select Apps.
  3. Locate TSN Phone.
  4. Open Notifications.
  5. Enable incoming call notifications if available.

Step 2: Review Battery Settings

  1. Open the application’s settings in Android.
  2. Locate Battery or App Battery Usage.
  3. Review whether the application is restricted from running in the background.
  4. Follow your organization’s approved settings.

Step 3: Check Background Connectivity

  1. Confirm that Wi-Fi or cellular data is enabled.
  2. Review whether Android is restricting background data.
  3. Open TSN Phone and verify that your extension is connected.
  4. Lock the phone.
  5. Ask a coworker to place a test call.

Note: Background application settings vary by Android manufacturer and version.

Important: Do not bypass organization-managed security or battery policies without authorization.

TSN Phone Is Using the Wrong Headset or Speakers

If your calls use an unexpected audio device:

Windows or Mac

  1. Open TSN Phone.
  2. Navigate to audio preferences.
  3. Review the microphone selection.
  4. Review the speaker selection.
  5. Review the ringing device if available.
  6. Select the correct devices.
  7. Test the audio.

iPhone or Android

  1. Check whether a Bluetooth headset is connected.
  2. Review the selected call audio output.
  3. Disconnect an unused Bluetooth device if necessary.
  4. Test another call.

Note: Bluetooth devices may automatically reconnect and become the preferred audio output.

My Desk Phone Says No Service or Registration Failed

If your desk phone cannot connect to TSN Phone:

Step 1: Check Power

  1. Confirm that the phone is powered on.
  2. Check the power adapter if one is used.
  3. If the phone uses Power over Ethernet, verify that its network cable is connected.

Step 2: Check the Network Cable

  1. Confirm that the Ethernet cable is securely connected.
  2. Check the network port.
  3. Avoid disconnecting other managed networking equipment.

Step 3: Review the Error

  1. Read the message displayed on the phone.
  2. Record the exact wording.
  3. Note whether the phone recently restarted or lost power.
  4. Contact True Synergy Networks.

Important: Do not factory reset the phone or change its SIP account settings. Managed desk phones use configuration provided by TSN.

My Desk Phone Is Frozen or Not Responding

If the display or buttons stop responding:

  1. Wait briefly to see whether the phone recovers.
  2. Confirm that the phone still has power.
  3. Check whether it is displaying an update or configuration message.
  4. Avoid unplugging the device during a firmware update.
  5. Contact True Synergy Networks if it remains unresponsive.

Note: A standard restart may resolve temporary issues, but do not power-cycle a managed phone during an update or when instructed otherwise by support.

Call Transfers Are Not Working

If you cannot transfer a caller:

Step 1: Check the Destination

  1. Confirm that the extension number is correct.
  2. Review whether you selected blind or attended transfer.
  3. Check whether the destination is permitted.

Step 2: Check the Call

  1. Confirm that the original call remains connected.
  2. Review any displayed error.
  3. Follow the application’s supported transfer procedure.

If transfers continue failing, contact True Synergy Networks.

Important: External transfers may be restricted by your organization’s calling permissions.

My Voicemail Is Not Working

If you cannot access voicemail:

  1. Confirm that you are using the assigned extension.
  2. Check whether voicemail-to-email is enabled.
  3. Review your work email for voicemail notifications.
  4. Try the approved voicemail access method.
  5. Verify your voicemail PIN if prompted.

If your PIN is forgotten or no longer works, contact True Synergy Networks for assistance.

Important: Some organizations configure voicemail messages to be emailed and automatically removed from the telephone system. In these situations, an empty voicemail inbox may be expected.

I Am Not Receiving SMS Messages

If your organization uses TSN Phone business texting:

  1. Confirm that SMS is enabled for your account.
  2. Check whether your organization uses a shared SMS number.
  3. Verify that TSN Phone is connected.
  4. Open your SMS conversations.
  5. Review whether messages are arriving for another authorized employee using the shared number.

If incoming messages remain unavailable, contact True Synergy Networks.

Important: SMS telephone number assignments and provider connectivity are managed by TSN.

Check Whether Multiple Devices Are Affected

If a problem continues, determine whether it is limited to one device.

Test 1: Another TSN Phone Device

If available and approved:

  1. Try using your assigned extension on another supported device where it is already configured.
  2. Confirm whether the problem occurs there.
  3. Record the result.

Important: Do not sign into another employee’s extension or install additional accounts without authorization.

Test 2: Another Coworker

Ask a coworker whether they are experiencing similar symptoms.

For example:

  • Both users cannot make outgoing calls.
  • Only one user has no audio.
  • All desk phones are disconnected.
  • Mobile calling fails while desktop calling works.

This information can help support identify whether the issue is related to one device, one extension, or a larger service interruption.

Check the TSN Service Status Page

True Synergy Networks provides a service status page to help customers identify reported service interruptions. Visit: https://status.tsnhelp.us

Review the available service information for any reported issues. If an incident is listed, follow the published updates.

Important: Not every individual extension, device, or local network issue will appear on the public service status page. If no incident is reported but your phone service is not working, contact True Synergy Networks.

What Information Should I Provide to Support?

When contacting True Synergy Networks, providing specific information helps technicians troubleshoot the issue more efficiently.

If possible, include:

  • Your company name.
  • Your extension number.
  • The device experiencing the problem.
  • The operating system or desk phone model.
  • A brief description of the issue.
  • The approximate date and time.
  • Whether the issue affects incoming or outgoing calls.
  • Whether other employees are affected.
  • Any error messages displayed.
  • The troubleshooting steps you already attempted.

Example Support Request

“Hello, I’m having an issue with TSN Phone on my Windows computer. My extension is 102. Incoming calls ring normally, but callers cannot hear me. I’ve confirmed that my microphone is not muted and tested another headset. The issue started around 10:30 AM.”

Important: Never include passwords, voicemail PINs, authentication codes, or other sensitive login information in a support request.

When to Contact True Synergy Networks Immediately

Contact support promptly if:

  • Your entire office cannot make or receive calls.
  • Business emergency calling is unavailable.
  • Calls consistently disconnect.
  • Multiple employees experience one-way audio.
  • Your extension appears to be registered on an unfamiliar device.
  • Calls are being forwarded unexpectedly.
  • You suspect unauthorized access to your telephone account.
  • Your desk phone repeatedly loses registration.
  • Business SMS messages are unexpectedly failing for multiple employees.

Emergency Calling Notice: If you need emergency assistance and your TSN Phone service is unavailable, use an available cellular or other functioning telephone to contact emergency services. Do not delay seeking emergency assistance while troubleshooting the business phone system.

Additional Information

  • TSN Phone requires a stable network connection for supported calling features.
  • Application disconnections may result from local network interruptions or service availability issues.
  • Microphone and speaker settings can cause one-way audio symptoms.
  • Incoming call notifications depend on application and operating system settings.
  • Mobile push notifications may be affected by background activity restrictions.
  • Desk phone registration problems may require administrator assistance.
  • Repeated call disconnections may require network or SIP troubleshooting.
  • Call routing, telephone trunk configuration, and system permissions are managed by True Synergy Networks.
  • The TSN status page provides information about reported service incidents.
  • Contacting support with timestamps, symptoms, and device details can speed up troubleshooting.

Security Reminder: Never share your TSN Phone password, voicemail PIN, authentication codes, or SIP credentials. Do not factory reset managed desk phones, disable firewall protections, modify router settings, or install unapproved calling applications. Always use official TSN-approved support resources and report suspicious account activity immediately.