[asterisk-bugs] [Asterisk 0012010]: Asterisk 1.4.17 T.38 doesn't work

noreply at bugs.digium.com noreply at bugs.digium.com
Mon Feb 18 12:12:39 CST 2008


A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=12010 
====================================================================== 
Reported By:                balgaa
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   12010
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.17 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             02-16-2008 19:29 CST
Last Modified:              02-18-2008 12:12 CST
====================================================================== 
Summary:                    Asterisk 1.4.17 T.38 doesn't work
Description: 
I had installed Asterisk-1.4.17 on Debian 4.0 (etch) using it since two
months ago.

Recently, I required to do incoming and outgoing fax for SIP client.

I bought Grandstream HT-486 and Kapanga softphone.

I test following scenario:
--------------------------
Xerox fax machine---HT-486----Asterisk-----Kapanga
Xerox fax machine---HT-486----Asterisk-----HT-486---Panasonic fax machine

When I try to send/receive fax on scenario then it fail.

And I got 

[Feb 17 11:38:30] WARNING[16454] chan_sip.c: Unsupported SDP media type in
offer: image 5004 udptl t38
[Feb 17 11:38:32] WARNING[16454] chan_sip.c: Unsupported SDP media type in
offer: image 5004 udptl t38
[Feb 17 11:39:42] WARNING[16454] chan_sip.c: Unsupported SDP media type in
offer: image 5004 udptl t38
[Feb 17 11:39:45] WARNING[16454] chan_sip.c: Unsupported SDP media type in
offer: image 5004 udptl t38

error message then fax call immediately dropped.

sip.conf:
---------
[1100055]
type=friend
username=1100055
;secret=4321
nat=yes
faxdetect=both
host=dynamic
context=default
;defaultip=192.168.0.120
canreinvite=yes
callerid=1100055
mailbox=1100055 at local
disallow=all
allow=alaw
allow=ulaw
;allow=gsm
;allow=g729
;allow=g723
t38pt_udptl=yes
qualify=yes

[1100056]
type=friend
username=1100056
;secret=4321
nat=yes
faxdetect=both
host=dynamic
context=default
defaultip=192.168.0.120
canreinvite=yes
callerid=1100056
mailbox=1100056 at local
disallow=all
allow=alaw
allow=ulaw
;allow=gsm
;allow=g729
;allow=g723
t38pt_udptl=yes
qualify=yes

[1100057]
type=friend
username=1100057
;secret=4321
nat=yes
host=dynamic
context=towerfax
;defaultip=192.168.0.120
canreinvite=yes
callerid=1100057
mailbox=1100057 at local
disallow=all
allow=alaw
allow=ulaw
faxdetect=both
;allow=gsm
;allow=g729
;allow=g723
t38pt_udptl=yes
qualify=yes

sip show peer
-------------
pbx*CLI> sip show peer 1100057
pbx*CLI>

  * Name       : 1100057
  Secret       : <Not set>
  MD5Secret    : <Not set>
  Context      : towerfax
  Subscr.Cont. : <Not set>
  Language     :
  AMA flags    : Unknown
  Transfer mode: open
  CallingPres  : Presentation Allowed, Not Screened
  Callgroup    :
  Pickupgroup  :
  Mailbox      : 1100057 at local
  VM Extension : asterisk
  LastMsgsSent : 0/0
  Call limit   : 0
  Dynamic      : Yes
  Callerid     : "" <1100057>
  MaxCallBR    : 384 kbps
  Expire       : 53
  Insecure     : no
  Nat          : Always
  ACL          : No
  T38 pt UDPTL : Yes
  CanReinvite  : Yes
  PromiscRedir : No
  User=Phone   : No
  Video Support: No
  Trust RPID   : No
  Send RPID    : No
  Subscriptions: Yes
  Overlap dial : No
  DTMFmode     : rfc2833
  LastMsg      : 0
  ToHost       :
  Addr->IP     : 122.254.125.12 Port 56197
  Defaddr->IP  : 0.0.0.0 Port 5060
  Def. Username: 1100057
  SIP Options  : (none)
  Codecs       : 0xc (ulaw|alaw)
  Codec Order  : (alaw:20,ulaw:20)
  Auto-Framing:  No
  Status       : OK (12 ms)
  Useragent    : Grandstream HT487 1.0.8.33
  Reg. Contact : sip:1100057 at 192.168.0.173;user=phone

pbx*CLI>

pbx*CLI> sip show peer 1100055
pbx*CLI>

  * Name       : 1100055
  Secret       : <Not set>
  MD5Secret    : <Not set>
  Context      : default
  Subscr.Cont. : <Not set>
  Language     :
  AMA flags    : Unknown
  Transfer mode: open
  CallingPres  : Presentation Allowed, Not Screened
  Callgroup    :
  Pickupgroup  :
  Mailbox      : 1100055 at local
  VM Extension : asterisk
  LastMsgsSent : 0/0
  Call limit   : 0
  Dynamic      : Yes
  Callerid     : "" <1100055>
  MaxCallBR    : 384 kbps
  Expire       : 97
  Insecure     : no
  Nat          : Always
  ACL          : No
  T38 pt UDPTL : Yes
  CanReinvite  : Yes
  PromiscRedir : No
  User=Phone   : No
  Video Support: No
  Trust RPID   : No
  Send RPID    : No
  Subscriptions: Yes
  Overlap dial : No
  DTMFmode     : rfc2833
  LastMsg      : 0
  ToHost       :
  Addr->IP     : 203.91.112.200 Port 5060
  Defaddr->IP  : 0.0.0.0 Port 5060
  Def. Username: 1100055
  SIP Options  : (none)
  Codecs       : 0xc (ulaw|alaw)
  Codec Order  : (alaw:20,ulaw:20)
  Auto-Framing:  No
  Status       : OK (189 ms)
  Useragent    : Kapanga Softphone Desktop
1.00/2166s+1203210879_0016D3B685E5
  Reg. Contact :
sip:1100055 at 192.168.1.100:5060;transport=udp;rinstance=27F7788A27F77883
pbx*CLI> sip show peer 1100056
pbx*CLI>

  * Name       : 1100056
  Secret       : <Not set>
  MD5Secret    : <Not set>
  Context      : default
  Subscr.Cont. : <Not set>
  Language     :
  AMA flags    : Unknown
  Transfer mode: open
  CallingPres  : Presentation Allowed, Not Screened
  Callgroup    :
  Pickupgroup  :
  Mailbox      : 1100056 at local
  VM Extension : asterisk
  LastMsgsSent : 0/0
  Call limit   : 0
  Dynamic      : Yes
  Callerid     : "" <1100056>
  MaxCallBR    : 384 kbps
  Expire       : 650
  Insecure     : no
  Nat          : Always
  ACL          : No
  T38 pt UDPTL : Yes
  CanReinvite  : Yes
  PromiscRedir : No
  User=Phone   : No
  Video Support: No
  Trust RPID   : No
  Send RPID    : No
  Subscriptions: Yes
  Overlap dial : No
  DTMFmode     : rfc2833
  LastMsg      : 0
  ToHost       :
  Addr->IP     : 122.254.125.12 Port 50878
  Defaddr->IP  : 192.168.0.120 Port 5060
  Def. Username: 1100056
  SIP Options  : (none)
  Codecs       : 0xc (ulaw|alaw)
  Codec Order  : (alaw:20,ulaw:20)
  Auto-Framing:  No
  Status       : OK (12 ms)
  Useragent    : Grandstream HT487 1.0.8.33
  Reg. Contact : sip:1100056 at 192.168.0.170;user=phone

I tested 1.4.16/1.4.16.2/1.4.17 all same.


====================================================================== 

---------------------------------------------------------------------- 
 balgaa - 02-18-08 12:12  
---------------------------------------------------------------------- 
Is there any way to get work T.38 on Asterisk 1.4.16/17? 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
02-18-08 12:12  balgaa         Note Added: 0082489                          
======================================================================




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