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dvermeulen's avatar
dvermeulen
Copper Contributor
Dec 09, 2021

Teams rejects call with error 422

Hi all,   I'm having some trouble with calling from a Swyx pbx to Microsoft Teams direct routing.    When I place a call from Swyx pbx to Teams, the call get's denied. When I checked the logs I n...
Audio codes
Direct Routing
PSTN
teams
teams voice
Therese_Solimeno's avatar
Therese_Solimeno
Moderator
Dec 09, 2021

Hi dvermeulen  If you don't get a timely response from this community, you might want to open a ticket at answers.microsoft.com tech support, where authorized MSFT agents can troubleshoot an issue until it's resolved.

Pieter007's avatar
Pieter007
Copper Contributor
Feb 22, 2024
Has the issue been resolved, having the same issue.
Call forwarding to external number works but when the carrier sends a new re-invite Teams returns with 422 Session Interval Too Small and the call gets dropped.
  • Pieter007's avatar
    Pieter007
    Copper Contributor
    Feb 22, 2024

    This is my failed log, very desperate, MS case opened for a month now. 
    ---- Incoming SIP Message from 52.114.76.76:5061 to SIPInterface #2 (SIP_Teams) TLS TO(#919) SocketID(5762094) ---- [Time:16-02@12:32:31.466]

    SIP/2.0 422 Session Interval Too Small
    FROM: <sip:xxxxx
    TO: <sip:+xxxxxx
    CSEQ: 2 INVITE
    CALL-ID: xxxxxx
    VIA: SIP/2.0/TLS xxxxx
    REASON: Q.850;cause=127;text="d71eea37-6fc6-4ddf-8291-dfb20edb98ff;Session Interval Too Small"
    CONTENT-LENGTH: 0
    MIN-SE: 300
    ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
    SERVER: Microsoft.PSTNHub.SIPProxy v.2024.2.6.5 i.EUNO.12

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