Long delays for DTMF - Seems that 200 OK is "lost"

Hello,

I'm trying to figure out why sending a DTMF (SIP mode,
info-tone) is so
long...
To help, I've added some traces in the sippdu.cxx file, and
here they are :

Sending "1" to
1a1b269c-212d-db11-8988-0030484233faref-dev.def.com.com
  0:21.235        SimpleOPAL          sipcon.cxx(2678)  SIP
SendUserInputTime('1', 0), using mode SendUserInputAsTone
  0:21.238        SimpleOPAL          sipcon.cxx(2696)  SIP 
   Calling Wait()
  0:21.240        SimpleOPAL          sippdu.cxx(2052) 
Transaction
Sending PDU via connection
  0:21.241        SimpleOPAL          sippdu.cxx(2054) 
Transaction     Sent
PDU via connection
  0:21.241        SimpleOPAL          sippdu.cxx(2073) 
Transaction     Start
done, Wait()ing for finished
  0:37.242       Housekeeper          sippdu.cxx(2303)  SIP 
   Signal
transaction as finished
  0:37.242        SimpleOPAL          sippdu.cxx(2075) 
Transaction
finished is ...
  0:37.243        SimpleOPAL          sipcon.cxx(2698)  SIP 
   Returning from
Wait()
  0:37.243        SimpleOPAL          sippdu.cxx(2022)  SIP 
   Transaction 1
INFO destroyed.
  0:37.244        SimpleOPAL          sipcon.cxx(2709)  SIP 
   Calling
OpalConnection::SendUserInputTone
  0:37.244        SimpleOPAL      connection.cxx(1036) 
Connection
Calling rfc2833 handler
  0:37.245        SimpleOPAL      connection.cxx(1038) 
Connection
Returning rfc2833 handler
Sent

The problem seems to be in sippdu.cxx, when running :
finished.Wait()
as the PSyncPoint seems to be released by
"Housekeeper".

But, at the same time, running a tcpdump show that the INFO
message is 
followed instantly by a 200 OK :

13:01:15.908425 ref-dev.def.com.com..34060 >
ref-dev.def.com.com..34055:  udp
582 (DF)
0x0000   4500 0262 0000 4000 4011 b712 c0a8 0014       
E..b..........
0x0010   c0a8 0014 850c 8507 024e 2db5 494e 464f       
.........N-.INFO
0x0020   2073 6970 3a73 7570 2e61 6463 6f6d 3140       
.sip:sup.adcom1
0x0030   3139 322e 3136 382e 302e 3230 3a33 3430       
192.168.0.20:340
0x0040   3535 3b74 7261 6e73 706f 7274 3d75 6470       
55;transport=udp
0x0050   2053 4950 2f32 2e30 0d0a 4353 6571 3a20       
.SIP/2.0..CSeq:.
0x0060   3120 494e 464f 0d0a 5669 613a 2053 4950       
1.INFO..Via:.SIP
0x0070   2f32 2e30 2f55 4450 2031 3932 2e31 3638       
/2.0/UDP.192.168
.....
0x01f0   4745 2c49 4e46 4f2c 5049 4e47 0d0a 436f       
GE,INFO,PING..Co
0x0200   6e74 656e 742d 5479 7065 3a20 6170 706c       
ntent-Type:.appl
0x0210   6963 6174 696f 6e2f 6474 6d66 2d72 656c       
ication/dtmf-rel
0x0220   6179 0d0a 436f 6e74 656e 742d 4c65 6e67       
ay..Content-Leng
0x0230   7468 3a20 3232 0d0a 4d61 782d 466f 7277       
th:.22..Max-Forw
0x0240   6172 6473 3a20 3230 0d0a 0d0a 5369 676e       
ards:.20....Sign
0x0250   616c 3d32 0d0a 4475 7261 7469 6f6e 3d30       
al=2..Duration=0
0x0260   0d0a                                           ..
13:01:15.916301 ref-dev.def.com.com..34055 >
ref-dev.def.com.com..34060:  udp
403 (DF)
0x0000   4500 01af 0000 4000 4011 b7c5 c0a8 0014       
E.............
0x0010   c0a8 0014 8507 850c 019b 9748 5349 502f       
...........HSIP/
0x0020   322e 3020 3230 3020 4f4b 0d0a 4353 6571       
2.0.200.OK..CSeq
0x0030   3a20 3120 494e 464f 0d0a 5669 613a 2053       
:.1.INFO..Via:.S
0x0040   4950 2f32 2e30 2f55 4450 2031 3932 2e31       
IP/2.0/UDP.192.1
0x0050   3638 2e30 2e32 303a 3334 3036 300d 0a46       
68.0.20:34060..F
0x0060   726f 6d3a 203c 7369 703a 7573 6572 4031       
rom:.<sip:user1
...
0x0170   5945 2c43 414e 4345 4c2c 4e4f 5449 4659       
YE,CANCEL,NOTIFY
0x0180   2c52 4546 4552 2c4d 4553 5341 4745 2c49       
,REFER,MESSAGE,I
0x0190   4e46 4f2c 5049 4e47 0d0a 436f 6e74 656e       
NFO,PING..Conten
0x01a0   742d 4c65 6e67 7468 3a20 300d 0a0d 0a         
t-Length:.0....

It does look as if the "200 OK" message is not
handled...

Any idea ?

Regards,
Paul

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