Hi guys,

I'm getting the following BYE reason code from my Service Provider:

recv 740 bytes from udp/[177.71.206.193]:5060 at 02:57:50.740042:

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BYE sip:gw+twilio@52.1.1.1:5090;transport=udp;gw=twilio SIP/2.0

CSeq: 1 BYE

From: <sip:+551121174769@turn2data-telephonist.pstn.br1.twilio.com>;tag=76430350_6772d868_ebbbd5d1-d9b1-49db-981e-ec4b3e238564

To: "" <sip:+55114XXXYYYY@172.31.3.166>;tag=mjZyjF9Ute8DD

Call-ID: 7d8a1944-e512-1234-4eaf-02d310a86cb3

Max-Forwards: 68

Via: SIP/2.0/UDP 177.71.206.193:5060;branch=z9hG4bKfaa.6c72ded1.0

Via: SIP/2.0/UDP 172.19.147.73:5060;rport=5060;received=177.71.206.215;branch=z9hG4bKebbbd5d1-d9b1-49db-981e-ec4b3e238564_6772d868_205642673073712

Reason: MVTSLocal;cause=10;text="BYE received",SIP;cause=406;text="Service Unavailable"

User-Agent: Twilio Gateway

X-Twilio-CallSid: CA5411d5015d3df04541c6e14e9fb41719

Content-Length: 0

When placing call via ESL I get reported NORMAL_CLEARING vs 406

I don't see 406 Listed in Wiki:

https://freeswitch.org/confluence/display/FREESWITCH/Hangup+Cause+Code+Table

According to RFC seems to be valid https://tools.ietf.org/html/rfc3326

Examples are:

      Reason: SIP ;cause=200 ;text="Call completed elsewhere"
      Reason: Q.850 ;cause=16 ;text="Terminated"
      Reason: SIP ;cause=600 ;text="Busy Everywhere"
      Reason: SIP ;cause=580 ;text="Precondition Failure"

Can we add support to handle these type of reasons to a common one ? Like Unknown?

I will talk to my SP to see if they can change it to 503.

Any suggestions?