SBC sending wrong respond reason phrase to client
I have a client registering to the SBC all Ok, I/c and o/g calls are all working.
Just the SBC is replying with the correct code 100 , 180 ringing, 200 etc.
but the SBC is always send back as a reason 'Not Acceptable." ( noting a full stop at the end)
an example below, remove Ip add, changed no's and FDQN
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Apr 1 19:57:39.706 On [0:0]xx.xxx.xx.x:5060 received from xx.xx.xx.xx:5060
INVITE sip:012345678902@sip01.com SIP/2.0
Via: SIP/2.0/UDP 192.168.x.x.:5060;branch=z9hG4bK800794b0c072ea11ba4476ab1b3e77bf;rport
From: "807777" <sip:8029992@sip01.com>;tag=1002724542