VoIP Mailing List Archives

[jakob at j-mb.de]

Hi, im using a Asterisk Server which is not behind NAT.
First i had problems with the fax detection. But this is now solved
after adding a wait(2) at the correct place. But i'm still unable to
receive a fax due to res_rtp_asterisk.c:3548 ast_rtp_read: RTP Read too
short after the Fax session has started.


My sip.conf includes

[general]
allowguest=no
alwaysauthreject=yes

sendrpid=rpid
trustrpid=yes
language=de
videosupport=yes
callevents=yes
qualify=yes
nat=force_rport,comedia
faxdetect=yes
t38pt_udptl=yes,redundancy,maxdatagram=400
directrtpsetup=yes
disallow=all
allow=ulaw
allow=alaw

and the corresponding Peer

[sipcall.ch]
type=peer
insecure=invite
defaultuser=123456789
fromuser=123456789
fromdomain=voipdomain.com
secret=gueswhat
host=voipdomain.com
qualify=yes
context=from-sip
dtmfmode=rfc2833
callbackextension=123456789

the Dialplan

[inbound]
exten => _X.,1,Answer()
exten => _X.,n,Set(DB(lastcaller/number)=${CALLERID(num)})
exten => _X.,n,GotoIf(${BLACKLIST()}?black,1)
exten => _X.,n,Wait(2)
exten => _X.,n,Dial(SIP/200&SIP/201,60,tToxX)
exten => _X.,n,Goto(ausser-zeit,_X.,3)
exten => _X.,n,Hangup()

exten => fax,1,NoOp(**** FAX DETECTED ****)
exten => fax,n,Goto(fax-rx,receive,1)

[fax-rx]

exten => receive,1,NoOp(**** FAX RECEIVE ****)
exten => receive,n,Set(GLOBAL(FAXCOUNT)=$["${GLOBAL(FAXCOUNT)}" + "1"])
exten => receive,n,Set(FAXCOUNT=${GLOBAL(FAXCOUNT)})
exten => receive,n,Set(FAXFILE=fax-${FAXCOUNT}-rx.tif)
exten => receive,n,Set(GLOBAL(LASTFAXCALLERoNUM)=${CALLERID(num)})
exten => receive,n,Set(GLOBAL(LASTFAXCALLERNAME)=${CALLERID(name)})
exten => receive,n,NoOp(**** SETTING FAXOPT ****)
exten => receive,n,Set(FAXOPT(ecm)=yes)
exten => receive,n,Set(FAXOPT(headerinfo)=MYFAX RX)
exten => receive,n,Set(FAXOPT(localstationid)=1234567890)
exten => receive,n,Set(FAXOPT(maxrate)=14400)
exten => receive,n,Set(FAXOPT(minrate)=2400)
exten => receive,n,NoOp(FAXOPT(ecm) : ${FAXOPT(ecm)})
exten => receive,n,NoOp(FAXOPT(headerinfo) : ${FAXOPT(headerinfo)})
exten => receive,n,NoOp(FAXOPT(localstationid) : ${FAXOPT(localstationid)})
exten => receive,n,NoOp(FAXOPT(maxrate) : ${FAXOPT(maxrate)})
exten => receive,n,NoOp(FAXOPT(minrate) : ${FAXOPT(minrate)})
exten => receive,n,NoOp(**** RECEIVING FAX : ${FAXFILE} ****)
exten => receive,n,ReceiveFAX(/var/spool/asterisk/faxin/${FAXFILE},dfs)
exten => h,1,NoOp(FAXOPT(ecm) : ${FAXOPT(ecm)})
exten => h,n,NoOp(FAXOPT(filename) : ${FAXOPT(filename)})
exten => h,n,NoOp(FAXOPT(headerinfo) : ${FAXOPT(headerinfo)})
exten => h,n,NoOp(FAXOPT(localstationid) : ${FAXOPT(localstationid)})
exten => h,n,NoOp(FAXOPT(maxrate) : ${FAXOPT(maxrate)})
exten => h,n,NoOp(FAXOPT(minrate) : ${FAXOPT(minrate)})
exten => h,n,NoOp(FAXOPT(pages) : ${FAXOPT(pages)})
exten => h,n,NoOp(FAXOPT(rate) : ${FAXOPT(rate)})
exten => h,n,NoOp(FAXOPT(remotestationid) : ${FAXOPT(remotestationid)})
exten => h,n,NoOp(FAXOPT(resolution) : ${FAXOPT(resolution)})
exten => h,n,NoOp(FAXOPT(status) : ${FAXOPT(status)})
exten => h,n,NoOp(FAXOPT(statusstr) : ${FAXOPT(statusstr)})
exten => h,n,NoOp(FAXOPT(error) : ${FAXOPT(error)})

udptl.conf
[general]
udptlstart=4000
udptlend=4999
udptlfecentries = 3
udptlfecspan = 3
use_even_ports = no

rtp.conf
[general]
rtpstart=10000
rtpend=20000

res_fax.conf
[general]
maxrate=14400
minrate=2400
statusevents=yes
modems=v17,v27,v29
ecm=yes


mail*CLI> core set verbose 6
Set remote console verbosity to 6
== Using SIP RTP CoS mark 5
-- Executing [41325122774@from-sip:1]
Answer("SIP/sipcall.ch-0000008d", "") in new stack

[lmoore at omninet.net.au]

On 3/02/2014 3:34 PM, Jakob-Matthias Böttger wrote:
.
.
.

[jakob at j-mb.de]

Hi, changing

faxdetect=cng
and
t38pt_udptl=no

helped making it work.

Thanks


Am 03.02.2014 11:57, schrieb Larry Moore:

[lmoore at omninet.net.au]

On 3/02/2014 7:15 PM, Jakob-Matthias Böttger wrote:

[jakob at j-mb.de]

as He is describing it he should actually provide t.38. but i don't know
why it is not working thus im now getting

Feb 3 12:32:55] WARNING[9942][C-00000004]: chan_sip.c:10353
process_sdp: Failed to initialize UDPTL, declining image stream
[Feb 3 12:32:55] WARNING[9942][C-00000004]: chan_sip.c:10497
process_sdp: Insufficient information in SDP (c=)...
and then the fax session starts recording data

Am 03.02.2014 12:34, schrieb Larry Moore:

[lmoore at omninet.net.au]

On 3/02/2014 7:38 PM, Jakob-Matthias Böttger wrote:

[jakob at j-mb.de]

Am 03.02.2014 12:56, schrieb Larry Moore:

[jakob at j-mb.de]

Am 03.02.2014 13:20, schrieb Jakob-Matthias Böttger:

[lmoore at omninet.net.au]

On 3/02/2014 8:42 PM, Jakob-Matthias Böttger wrote: