WhatsApp Calling SIP inbound from LiveKit not ringing (drops during dialing)

Tecnologia Atlas
Thu, 26 Mar 2026 18:40:59 +0000
Telephony

We are integrating WhatsApp Calling via SIP with LiveKit Cloud.
Outbound INVITE reaches wa.meta.vc:5061 but calls never ring on destination WhatsApp number.

Observed from provider side:

call status stays “dialing”

then disconnects (“CLIENT_INITIATED”)

provider reported transport errors in some attempts:

“tls: no application protocol”

“transaction failed to complete (0 intermediate responses)”

Environment:

SIP destination host: wa.meta.vc

port: 5061

transport: TLS

From number: +5511978308670 (business number)

Tested destination numbers: +558494198787 and +5584994198787

Username: phone_number_id

Password: SIP password (recently rotated and updated)

Please verify on your side:

1. if this business number is fully enabled for WhatsApp Calling SIP,

2. if there are restrictions for destination format (with/without 9 in BR),

3. if there are required TLS/SIP profile settings for third-party SIP trunks,

4. if these call attempts are being rejected and why.

anyone knows what could be the problem or where can i find the proper support for solving

2 posts - 2 participants