Vonage API Help Center

Vonage API Help Center

Voice

Country-Specific Features and Restrictions

Central America

In-Country, Local, or No-CLI Calls Rejected

US Outbound Voice Calls Billing and Pricing

India Voice Features and Restrictions

Issue with High Charges for Transferred Calls to UK from Unknown Calling Number

STIR/SHAKEN Caller ID Authentication and Robocalls

Can I call premium rate numbers?

Inbound Voice

Information on receiving voice calls

How can I handle inbound calls to my voice-enabled virtual number?

Inbound Voice Features, Restrictions, and Capacity

Do I have to answer inbound calls?

Can I forward calls to an IP address rather than a named SIP server address?

Voice API

Why is the UUID not present when DTMF times out

Multiple Record Actions in Same Conversation

Do we retry if the voice event webhook fails?

How do I verify that the Voice API Webhook request and it's payload has not been tampered during transit?

How To Check Call Quality With Voice Inspector

What is a Conversation ID?

See all 50 articles

Voice Platform

RTCP Sender Reports (SR) and Receiver Reports (RR) for Voice Calls

Ringback Tone (RBT)

Which codecs does Vonage SIP Trunking support?

What is Post-Dial Delay (PDD)?

How does Vonage investigate Voice call connectivity issues?

Troubleshooting Voice Call connectivity Issues

See all 18 articles

SIP

SIP 402 and 503 "Payment Required" Error Codes on Voice Calls

SIP Client Registration and Call Failure After Creating a Secondary API Secret

Inbound Call Failover Not Working in SIP Trunking

Why does my SIP endpoint reject the call with SIP 403 Forbidden?

Is the Diversion header supported in SIP Trunking?

No Audio In Programmable SIP IVR

See all 13 articles