Voip Compatibility issues with ISP and ISP hardware

Vonage cannot guarantee the quality of service when the Vonage adapter is connected to an International Internet Service Provider (ISP), but here are some possible reasons your service may be affected:

• Compatibility issues with ISP and ISP hardware (using a USB modem instead of an Ethernet modem)
• VOIP restrictions in the country
• ISP authentication methods
• Latency and packet loss

---

Audio Issues

To check for audio issues:

1. Check for heavy packet loss or high latency by running a trace route and ping test.
2. Contact the International Internet Service Provider if these tests show negative results.

---

No Dial Tone

To resolve no dial tone issues:

1. Refer to Resolve Dial Tone Problems.
2. Check your hardware for any compatibility issues.
3. Ensure that the authentication requirements for the Vonage device are met. To do so, ensure the Point-to-Point Protocol over Ethernet (PPPoE) and Point-to-Point Protocol over ATM (PPPoA) settings are correctly configured.
4. Contact the International Internet Service Providerdirectly.