Vonage API Help Center

Vonage API Help Center

Voice

Country-Specific Features and Restrictions

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

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

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?

How to configure the custom webhook timeout for Voice API functionality and what are the allowed timeout ranges ?

How do I change TTL for the Conversations and Call Legs?

See all 48 articles

Voice Platform

What types of DTMF are supported?

Why does Caller ID show as potential spam?

Can I display my name on the receiving party's phone for outbound calls?

Which IP addresseses should I allow in order to receive voice traffic from the Vonage API Platform?

What characters can be detected via keypad input?

How many calls can I create per second?

See all 11 articles

SIP

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

Is SIP Diversion header supported?

No Audio In Programmable SIP IVR

Does Vonage support Digest Authentication for inbound calls to a SIP endpoint?

Is SIP REFER supported?

How to Create a Redundant SIP-Forwarding Configuration

See all 10 articles