[asterisk-bugs] [JIRA] (ASTERISK-26508) MGCP call flow when going off-hook

Wed Oct 26 16:33:10 CDT 2016

Andrzej Augustynowicz created ASTERISK-26508:
------------------------------------------------

             Summary: MGCP call flow when going off-hook
                 Key: ASTERISK-26508
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26508
             Project: Asterisk
          Issue Type: Information Request
      Security Level: None
          Components: Channels/chan_mgcp
    Affects Versions: 13.11.2
         Environment: Debian x64 Jessie, Asterisk 13.11.2, 14.0.2,1.8.32.3
            Reporter: Andrzej Augustynowicz


I have problem with off-hook sequence

[general]
port = 2427
bindaddr = 0.0.0.0
disallow=all
allow=alaw
allow=ulaw


[10.16.128.122]
host=10.16.128.122
dtmfmode=rfc2833
ncs = yes
pktcgatealloc = yes
hangupongateremove = yes
context=XXX
callerid=123456789
line=>aaln/1

--------------------------------------------------------
Start first hook-off - dialtone OK
NTFY 38707614 aaln/1 at 10.16.128.122 MGCP 1.0 NCS 1.0
X: 28024E6E
O: hd
200 38707614 OK
CRCX 120 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
C: 36db1987362d2ae5
L: p:20, s:off, e:on, a:PCMU
M: inactive
X: 362d2ae5
RQNT 121 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
X: 28024e6e
R: L/hu(N),L/hf(N),L/[0-9#*](N)
S: L/dl
200 120 OK
I: 1F26

v=0
o=- 120 7974 IN IP4 10.16.128.122
s=-
c=IN IP4 10.16.128.122
b=AS:82
t=0 0
m=audio 53456 RTP/AVP 0
a=X-pc-secret:base64:tnPwjAaD25Sz3rYOqDL48NPq2pFdvWVnhH5ovAHVwWwdyHULrzeirLU6yF9mvQ== wdamHeQWysDdsTgy6XSYRoWNGobvIk0s896FiaUIE8PT/uT+4gSx2be8nXaszw==
a=X-pc-csuites-rtp:62/51 64/51 60/51 60/50
a=X-pc-csuites-rtcp:81/71 81/70 80/70
a=X-pc-nrekey:0
a=mptime:20
a=ptime:20
a=sqn: 0
a=cdsc: 1 image udptl t38
000 120 OK
200 121 OK
NTFY 38707615 aaln/1 at 10.16.128.122 MGCP 1.0 NCS 1.0
X: 28024E6E
O: hu
200 38707615 OK

When on-hook DLCX is not needed?
--------------------------------------------------------------------------------
Start next hook-off = stdder-dialtone (chan_mgcp.c: Off hook, but already have owner on aaln/1 at 10.16.128.122):

NTFY 38707616 aaln/1 at 10.16.128.122 MGCP 1.0 NCS 1.0
X: 28024E6E
O: hd
200 38707616 OK
MDCX 122 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
C: 36db1987362d2ae5
L: , a:PCMU, dq-gi:980
M: sendrecv
X: 362d2ae5
I: 1F26
R: L/hu(N),L/hf(N),L/[0-9#*](N)

v=0
o=root 23725 23725 IN IP4 192.168.255.50
s=session
c=IN IP4 192.168.255.50
t=0 0
m=audio 11478 RTP/AVP 0
a=rtpmap:0 PCMU/8000
RQNT 123 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
X: 28024e6e
R: L/hu(N),L/hf(N),L/[0-9#*](N)
100 122 

v=0
o=- 120 7975 IN IP4 10.16.128.122
s=-
c=IN IP4 10.16.128.122
b=AS:80
t=0 0
m=audio 53456 RTP/AVP 0
a=X-pc-csuites-rtp:60/50
a=X-pc-csuites-rtcp:80/70
a=X-pc-nrekey:0
a=mptime:20
a=ptime:20
a=sqn: 0
a=cdsc: 1 image udptl t38
200 122 OK
K:
DQ-RI: 2F58

v=0
o=- 120 7975 IN IP4 10.16.128.122
s=-
c=IN IP4 10.16.128.122
b=AS:80
t=0 0
m=audio 53456 RTP/AVP 0
a=X-pc-csuites-rtp:60/50
a=X-pc-csuites-rtcp:80/70
a=X-pc-nrekey:0
a=mptime:20
a=ptime:20
a=sqn: 0
a=cdsc: 1 image udptl t38
000 122 OK
DLCX 125 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
C: 36db1987362d2ae5
X: 362d2ae5
I: 1F26
250 125 Connection was deleted
P: PS=11, OS=1760, PR=0, OR=0, PL=0, JI=0, LA=0, PC/RPS=0, PC/ROS=0, PC/RPL=0, PC/RJI=0
RQNT 123 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
X: 28024e6e
R: L/hu(N),L/hf(N),L/[0-9#*](N)
200 123 OK
RQNT 124 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
X: 28024e6e
R: L/hu(N),L/hf(N),L/[0-9#*](N)
S: L/cg
522 124 No such event or signal
RQNT 126 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
X: 28024e6e
R: L/hu(N),L/hf(N)
S: L/ro
200 126 OK
NTFY 38707617 aaln/1 at 10.16.128.122 MGCP 1.0 NCS 1.0
X: 28024E6E
O: hu
200 38707617 OK
DLCX 127 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
X: 362d2ae5
RQNT 128 aaln/1@[10.16.128.122] MGCP 1.0 NCS 1.0
X: 28024e6e
R: L/hd(N)
S: L/vmwi(-)
250 127 Connection was deleted
200 128 OK

After that (DLCX?) repeats sequence OK / bad


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