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Troubleshoot SIP trunk connection problems and configuration issues
This guide helps resolve common SIP integration issues when connecting your SIP provider to Famulor.

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Testing Strategy

  1. Test outbound calls first
  2. Test inbound calls after outbound works

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Outbound SIP Issues

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Connection Problems

  1. Verify SIP credentials (username, password, server)
  2. Confirm phone type with provider
  3. Enable fixed IP where required and enter provider IP
  4. Check codec, transport, and port settings

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SIP Registration Notes

Famulor:
  • Does not send SIP REGISTER to your provider
  • Does not require provider-side SIP REGISTER
  • Uses direct call authentication

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Inbound SIP Issues

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Authentication Setup

For inbound calls:
  1. Use IP authentication (not username/password)
  2. Whitelist all provider IPs in Famulor
  3. Configure provider to route to our FQDN domain (not direct IP)

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Common Inbound Failures

  • Verify all provider IPs are whitelisted
  • Confirm provider sends calls to FQDN
  • Check destination number format

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Transfer Phone Call Not Working

If call transfer fails:
  1. Set transfer mode to Advanced
  2. Use SIP URI format like sip:+1234567890@sip.provider.com:5060
  3. Confirm provider supports SIP REFER
  4. Test with and without explicit port
  5. Validate destination reachability

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Getting Help

Provide support with:
  • Call log errors
  • SIP trunk configuration
  • Outbound and inbound test results
  • Transfer URI used during testing