[Help] Can't get SIP HEADER "Call-Info"

Hi, all.

I’m having a trouble using func SIP_HEADER at Asterisk 13.4.0.

A’m expecting incoming call with sip header “Call-Info: answer-after=0” to answer that call in my dialplan. Looking to that call via Waireshark - seems to be OK. All needed headers are present.

[quote=“Wireshark INVITE”]INVITE sip:User1@10.0.2.33:60513 SIP/2.0
Via: SIP/2.0/UDP 10.0.12.134:5060;branch=z9hG4bK2d8e9378-b81c0000-a06ee108
From: “3102” sip:3102@10.0.12.134;tag=2e8e9378-b81c0000-a06ee108
To: sip:User1@10.0.12.134
CSeq: 1 INVITE
Call-ID: 04d25acb-2a71-4558-5bbc-a23bdc383f9a@000E2BF2-09033370
Contact: “3102” sip:User1@10.0.12.134:5060;transport=UDP
Call-Info: sip:TSOktell2;answer-after=0
User-Agent: Oktell 2.11.1
Max-Forwards: 70
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, INFO
Content-Type: application/sdp
Content-Length: 203
[/quote]

But in my dialplan func SIP_HEADER(Call-Info) returns empty. Other Headers (To, From…) working good.

[quote=“CLI”]-- Executing [h@from-tsoktell:1] NoOp(“SIP/A.Repko-0000000e”, “”) in new stack
– Executing [h@from-tsoktell:2] NoOp(“SIP/A.Repko-0000000e”, “SIP_HEADER(To)=sip:A.Repko@10.0.12.134”) in new stack
– Executing [h@from-tsoktell:3] NoOp(“SIP/A.Repko-0000000e”, “SIP_HEADER(From)=“3301” sip:3301@10.0.12.134;tag=c65fa078-f5740000-a06ee108”) in new stack
– Executing [h@from-tsoktell:4] NoOp(“SIP/A.Repko-0000000e”, “SIP_HEADER(User-Agent)=Oktell 2.11.1”) in new stack
Executing [h@from-tsoktell:5] NoOp(“SIP/A.Repko-0000000e”, “SIP_HEADER(Call-Info)=”) in new stack
[/quote]

Anyone have any ideas what is wrong?