Unable to Make VoIP Calls

Updated 1 September 20201 min read4 steps

If you can’t make outgoing VoIP calls, work through these checks. Most issues are quick to fix.

Quick Checks

1. Confirm Internet Connection

   VoIP won’t work without internet.

   • Open a website or run a speed test
   • If offline or unstable, fix your connection first

2. Check VoIP Registration

   If your line isn’t registered, calls won’t go through.

   • Log into Client Zone
   • Confirm your VoIP account is active
   • Re-enter credentials if needed

3. Check Your Device Setup

   • VoIP device properly connected to router
   • No loose or damaged cables
   • Handset powered and working

4. Using a Softphone (Zoiper / GS Wave)?

   • Connected to WiFi or mobile data
   • App shows Ready / Registered

Common Causes

No Dial Tone

• Restart router and VoIP device
• Wait for full reconnect before testing again

Incorrect Number Format

• Make sure you dial the full number
• Include area code (e.g. 021, 011)

Firewall or Router Blocking Calls

• Some routers block SIP traffic
• Test using mobile data (softphone)
  → If it works there, your router is the issue

Insufficient Airtime / Balance

• VoIP is prepaid
• Check your balance in Client Zone

Network or Routing Issue

• If only certain numbers fail
• Note the number and time
• Report it for investigation

Still Not Working?

Before contacting support, have this ready:

• The number you’re trying to call
• Time of the issue
• Error message (if any)

This speeds things up.

Quick Tip

If your VoIP was working before and suddenly stopped, and you haven’t changed anything, it’s usually:

• A network issue
• A router setting
• Or registration dropped

Restarting your setup fixes a surprising amount of problems.