[Freeswitch-users] Twilio SIP trunk config - outbound call rejected

[Adelia C.]

Any idea why this INVITE is rejected with 400 Invalid Phone Number by Twilio?
The first INVITE asks for Proxy Authentication, that seems to pass and this is rejected.
Thank you!

INVITE sip:5101112222 at mycompany.pstn.twilio.com SIP/2.0
Via: SIP/2.0/UDP 10.50.1.116:5080;rport;branch=z9hG4bKa8QvU1B6QmeKc
Max-Forwards: 69
From: "unknown" <sip:4152221111 at mycompany.pstn.twilio.com>;tag=6UetZr6rDZgHF
To: <sip:5101112222 at mycompany.pstn.twilio.com>
Call-ID: 1ffda8b7-faaf-1232-8380-a9a65d1e96b1
CSeq: 68751485 INVITE
Contact: <sip:gw+twiliotrunk at 10.50.1.116:5080;transport=udp;gw=twiliotrunk>
Expires: 3600
User-Agent: FreeSWITCH-mod_sofia/1.5.12b~64bit
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
Supported: timer, path, replaces
Allow-Events: talk, hold, conference, refer
Proxy-Authorization: Digest username="4152221111", realm="sip.twilio.com", nonce="f722ae99d0a818bc422baa5d8", cnonce="IA1gJvqvEg6mmXR6WsQ", opaque="e89d2328e07da020d75a", algorithm=MD5, uri="sip:5101112222 at mycompany.pstn.twilio.com", response="e65d3dea5b1e3b35306cfa121ec2ae4d", qop=auth, nc=00000001
Content-Type: application/sdp
Content-Disposition: session
Content-Length: 268
X-FS-Support: update_display,send_info
Remote-Party-ID: "unknown" <sip:1000 at mycompany.pstn.twilio.com>;party=calling;screen=yes;privacy=off

v=0
o=FreeSWITCH 1418153731 1418153732 IN IP4 10.50.1.116
s=FreeSWITCH
c=IN IP4 10.50.1.116
t=0 0
m=audio 21366 RTP/AVP 0 8 3 101 13
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:3 GSM/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
--

SIP/2.0 400 Invalid phone number
To: <sip:5101112222 at ingenio.pstn.twilio.com>;tag=08602519_6772d868_5eef74bb-957c-486e-b261-2a2e63704d73
Via: SIP/2.0/UDP 10.50.1.116:5080;received=10.50.1.116;rport=5080;branch=z9hG4bKa8QvU1B6QmeKc
CSeq: 68751485 INVITE
Call-ID: 1ffda8b7-faaf-1232-8380-a9a65d1e96b1
From: "unknown" <sip:4152221111 at ingenio.pstn.twilio.com>;tag=6UetZr6rDZgHF
Contact: <sip:171.118.14.130:5060>
Content-Length: 0



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