IP Office 11.1.2.4 - Unable to receive inbound calls on Commio SIP trunks

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I am unable to get inbound calls on SIP trunks from provider Commio. SIP trunk registers fine and outbound calls are working great but no love for inbound calls. Pulled a monitor trace and the IP Office sees the call coming in but SSA doesnt see the call. Commio is showing a 503 Service Unavailable but the IP Office will just repeat the below trace until the call is dropped.

2023-06-16T11:59:35 83690054mS SIP Rx: UDP 192.81.237.20:5060 -> [highlight #000000]96.58.255.196[/highlight]:5060
INVITE sip:+18137901806@[highlight #000000]96.58.255.196[/highlight]:5060 SIP/2.0
Via: SIP/2.0/UDP 192.81.237.20:5060;branch=z9hG4bKbf57.03cabf23.0
From: "JONATHIN DAMIAN" <sip:+18133522410@192.81.237.21:5060>;tag=gK0e104043
To: <sip:+18137901806@[highlight #000000]96.58.255.196[/highlight]>
Call-ID: 319748794_125276800@4.55.78.33
CSeq: 673137 INVITE
Max-Forwards: 69
Allow: INVITE,ACK,CANCEL,BYE,UPDATE,OPTIONS
Accept: application/sdp, application/isup, application/dtmf, application/dtmf-relay, multipart/mixed
Contact: <sip:192.81.237.20;met=e15.73a03da3>
Content-Length: 304
Content-Disposition: session; handling=required
Content-Type: application/sdp
P-Asserted-Identity: "JONATHIN DAMIAN" <sip:+18133522410@192.81.237.21:5060;user=phone>

v=0
o=Sonus_UAC 13252 793226 IN IP4 4.55.78.33
s=SIP Media Capabilities
c=IN IP4 4.55.78.23
t=0 0
m=audio 34616 RTP/AVP 0 8 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=maxptime:20

 

[Nortel4Ever]

I'm assuming you have your Incoming Call Routes set up properly with a valid destination?

 

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Yes I have proper and valid ICR