Hi,
I am using asterisk 13.26.0 and getting duplicate cdr entry for each call,
please suggest 
extensions.conf:
[USERCONTEXT]
exten => _X.,1,Answer(2)
exten => _X.,n,NoOp({CDR(src)})
exten => _X.,n.NoOp({CDR(dst)})
exten => _X.,n,Dial(Sip/${EXTEN},45)
exten => _X.,n,Hangup()
console Logs:
– Executing [1001@USERCONTEXT:1] Answer(“SIP/1002-00000000”, “2”) in new stack
> 0x7fbe74030940 – Strict RTP switching to RTP target address 192.168.0.107:8000 as source
– Executing [1001@USERCONTEXT:2] NoOp(“SIP/1002-00000000”, “1002”) in new stack
– Executing [1001@USERCONTEXT:3] Dial(“SIP/1002-00000000”, “Sip/1001,45”) in new stack
== Using SIP RTP CoS mark 5
– Called Sip/1001
– SIP/1001-00000001 is ringing
> 0x7fbe74030940 – Strict RTP learning complete - Locking on source address 192.168.0.107:8000
– Got SIP response 486 “Busy Here” back from 192.168.0.107:53719
– SIP/1001-00000001 is busy
== Everyone is busy/congested at this time (1:1/0/0)
– Executing [1001@USERCONTEXT:4] Hangup(“SIP/1002-00000000”, “”) in new stack
cdr Tabel:
| “” <1002> | 1002 | 1001 | USERCONTEXT | SIP/1002-00000000 | SIP/1001-00000001 | Dial | Sip/1001,45 | 45 | 45 | BUSY | 3 | 1555388523.0 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019-04-16 09:52:03 | “” <1002> | 1002 | 1001 | USERCONTEXT | SIP/1002-00000000 | SIP/1001-00000001 | Dial | Sip/1001,45 | 45 | 45 | BUSY | 3 | 1555388523.0 |