[asterisk-ss7] Link Up but no audio

Daniel Pizarro Bustamante dpizarro at yahoo.com
Tue Apr 21 12:32:19 CDT 2009


Hello all,

Finally, I had to downgrade the asterisk/zaptel and use chan_ss7. The linkset is up and I can hear audio in both directions.

I think there was something wrong in the libss7-1.0 with the asterisk-trunk because the link had those symptoms:
- Originating a call from CLI with Originate command: 
  - application SendDTMF works, and with dahdi_monitor I could see TX and RX traffic (when I talk).
  - application Playback doesn't work, and with dahdi_monitor I could not see TX traffic (0 bytes). I could see RX traffic (when I talk).
  -  I use Monitor to record the call, and the file-in (RX) is empty, the file-out (TX) has the audio of the played prompt.

I hope it could be helpful for someone.

Regards,

Daniel

--- El lun 20-abr-09, Daniel Pizarro Bustamante <dpizarro at yahoo.com> escribió:

> De: Daniel Pizarro Bustamante <dpizarro at yahoo.com>
> Asunto: Re: [asterisk-ss7] Link Up but no audio
> A: asterisk-ss7 at lists.digium.com
> Fecha: lunes, 20 abril, 2009, 6:39 pm
> 
> Hello,
> 
> When I use SendDTMF the operator and the dahdi_monitor
> "see" the TX stream. It seems there is something wrong
> between Asterisk and the libss7.
> 
> Please help!
> 
> Daniel
> 
> 
> 
> --- El sáb 18-abr-09, Daniel Pizarro Bustamante <dpizarro at yahoo.com>
> escribió:
> 
> > De: Daniel Pizarro Bustamante <dpizarro at yahoo.com>
> > Asunto: Re: [asterisk-ss7] Link Up but no audio
> > A: asterisk-ss7 at lists.digium.com
> > Fecha: sábado, 18 abril, 2009, 6:17 pm
> > 
> > Hello Matthew:
> > 
> > I send an call by channel number 1, and I see the
> audio
> > only in one-way (RX).
> > 
> > [root at pelxsms2voice ~]# dahdi_monitor 1 -vv
> > 
> > Visual Audio Levels.
> > --------------------
> >  Use chan_dahdi.conf file to adjust the gains if
> needed.
> > 
> > ( # = Audio Level  * = Max Audio Hit )
> > <----------------(RX)----------------> 
> > ###################################*     
> >                
> >                
> >     
> > <----------------(TX)---------------->
> >  Rx: 11893 (15967) Tx:     0 ( 
> >   0)
> > 
> > So I think, the CIC mismatch is not the issue.
> > 
> > Daniel
> > 
> > 
> > 
> > --- El sáb 18-abr-09, Matthew Fredrickson <creslin at digium.com>
> > escribió:
> > 
> > > De: Matthew Fredrickson <creslin at digium.com>
> > > Asunto: Re: [asterisk-ss7] Link Up but no audio
> > > A: asterisk-ss7 at lists.digium.com
> > > Fecha: sábado, 18 abril, 2009, 1:34 pm
> > > Daniel Pizarro Bustamante wrote:
> > > > Hello Mesbah:
> > > > 
> > > > I am using the libss7-1.0 because the
> > libss7-trunk has
> > > an error that we could see in this forum.
> > > > 
> > > > The asterisk and dahdi was downloaded from
> the
> > svn
> > > (trunk versions).
> > > > 
> > > > How can I detect the CIC mismatch?
> > > 
> > > Sorry, hit the wrong button on my last email.
> > > 
> > > That was meant to say:
> > > 
> > > One way to do it is to bring a call up, run a
> > playback, and
> > > use 
> > > dahdi_monitor -v on the channel you think it
> should
> > be
> > > on.  If you do 
> > > not see the audio levels present on TX or RX, you
> have
> > the
> > > CIC wrong.
> > > 
> > > You can then run dahdi_monitor -v on the
> surrounding
> > > channels to see if 
> > > you're off by one or two on that channel.
> > > 
> > > Many people don't configure the subsequent spans
> > correctly
> > > after the 
> > > first one.  So, for example, for an E1,
> oftentimes a
> > > telco will 
> > > configure the first span with 32 CICs, even
> though
> > DAHDI
> > > registers only 
> > > 31 physical channels, and people forget to add a
> new
> > > "cicbeginswith=33" 
> > > for the channels in the second span, causing an
> off by
> > one
> > > CIC error 
> > > starting with the second span (and each
> subsequent
> > span).
> > > 
> > > Matthew Fredrickson
> > > Digium, Inc.
> > > 
> > > > 
> > > > Thanks,
> > > > 
> > > > Daniel Pizarro
> > > > 
> > > > 
> > > > Connected to Asterisk SVN-
> > > > 
> > > > 
> > > > --- El sáb 18-abr-09, Mesbahuddin Malik
> <mesbah.malik at gmail.com>
> > > escribió:
> > > > 
> > > >> De: Mesbahuddin Malik <mesbah.malik at gmail.com>
> > > >> Asunto: Re: [asterisk-ss7] Link Up but
> no
> > audio
> > > >> A: asterisk-ss7 at lists.digium.com
> > > >> Fecha: sábado, 18 abril, 2009, 11:40
> am
> > > >> Hi,
> > > >>  
> > > >> For various reasons this happen. The
> main
> > reasons
> > > are
> > > >>
> > > >>  
> > > >> 1.Firewall
> > > >>  
> > > >> 2.Libss7 version Mitch Matching
> > > >>  
> > > >> 3. CIC Mismatch
> > > >>  
> > > >> 4. Terminal End firewall issues
> > > >>  
> > > >>  
> > > >> so check the above and let me know . I
> can
> > help
> > > you in
> > > >> this respect.
> > > >>  
> > > >> Best regards
> > > >> Mesbah
> > > >>
> > > >>
> > > >> On Sat, Apr 18, 2009 at 8:14 PM,
> > > >> Daniel Pizarro Bustamante <dpizarro at yahoo.com>
> > > >> wrote:
> > > >>
> > > >>
> > > >>
> > > >> Hello:
> > > >>
> > > >> I have an SS7 deployment with Asterisk
> > > >> 1.6.x/libss7(1.0.x)/DAHDI.
> > > >>
> > > >> I try to originate a call (from CLI) and
> I am
> > able
> > > to
> > > >> connect the call
> > > >>
> > > >> but the called party doesn't hear
> anything.
> > Eg.
> > > >>
> > > >> Originate Local/01996613358 at llamada
> > application
> > > Playback
> > > >> tt-monkeys
> > > >>
> > > >> I can send dtmf's and the called party
> can
> > hear
> > > them.
> > > >>
> > > >> Originate Local/01996613358 at llamada
> > application
> > > SendDTMF
> > > >> 12345678
> > > >>
> > > >>
> > > >> The debug shows me that:
> > > >>
> > > >>   -- Executing
> > > [01996613358 at llamada:1]
> > > >> Set("Local/01996613358 at llamada-1bb8;2",
> > > >> "CALLERID(number)=7773") in new
> > > >> stack
> > > >>   -- Executing
> > > [01996613358 at llamada:2]
> > > >>
> > > >>
> Dial("Local/01996613358 at llamada-1bb8;2",
> > > >> "DAHDI/g1/01996613358") in new
> > > >> stack
> > > >>   -- Called g1/01996613358
> > > >> Len = 34 [ b2 af 1f c5 38 38 34 1e 01 00
> 01
> > 00 60
> > > 01 0a 00
> > > >> 02 0a 08 03
> > > >> 10 10 99 66 31 53 f8 0a 04 04 10 77 37
> 00 ]
> > > >>
> > > >> FSN: 47 FIB 1
> > > >> BSN: 50 BIB 1
> > > >>> [0] MSU
> > > >> [ b2 af 1f ]
> > > >>       Network Indicator:
> > > 3 Priority: 0 User Part: ISUP
> > > >> (5)
> > > >>       [ c5 ]
> > > >>       OPC 14544 DPC 14392
> > > SLS 1
> > > >>       [ 38 38 34 1e ]
> > > >>           
> > >    CIC: 1
> > > >>
> > > >>           
> > >    [ 01 00 ]
> > > >>           
> > >    Message Type: IAM
> > > >>           
> > >    [ 01 ]
> > > >>           
> > >    --FIXED LENGTH PARMS[4]--
> > > >>           
> > >    Nature of Connection Indicator:
> > > >>             
> > >          Satellites in
> > > connection:
> > > >> 0
> > > >>
> > > >>             
> > >          Continuity Check:
> > > Check
> > > >> not required (0)
> > > >>             
> > >          Outgoing half echo
> > > control
> > > >> device: not included (0)
> > > >>             
> > >          [ 00 ]
> > > >>           
> > >    Forward Call Indicators:
> > > >>             
> > >          Nat/Intl Call Ind:
> > > call to
> > > >> be treated as a national call (0)
> > > >>
> > > >>             
> > >          End to End Method
> > > Ind: no
> > > >> end-to-end method(s) available (0)
> > > >>             
> > >          Interworking Ind: no
> > > >> interworking encountered (0)
> > > >>             
> > >          End to End Info Ind:
> > > no
> > > >> end-to-end information available (0)
> > > >>
> > > >>             
> > >          ISDN User Part Ind:
> > > ISDN
> > > >> user part used all the way (1)
> > > >>             
> > >          ISDN User Part Pref
> > > Ind:
> > > >> ISDN user part not preferred all the way
> (1)
> > > >>             
> > >          ISDN Access Ind:
> > > >> originating access ISDN (1)
> > > >>
> > > >>             
> > >          SCCP Method Ind: no
> > > >> indication (0)
> > > >>             
> > >          [ 60 01 ]
> > > >>           
> > >    Calling Party's Category:
> > > >>             
> > >          Category: Ordinary
> > > calling
> > > >> subscriber (10)
> > > >>             
> > >          [ 0a ]
> > > >>
> > > >> pelxsms2voice*CLTransmission Medium
> > Requirements:
> > > >>             
> > >          Speech (0)
> > > >>             
> > >          [ 00 ]
> > > >>           
> > >    --VARIABLE LENGTH PARMS[1]--
> > > >>           
> > >    Called Party Number:
> > > >>             
> > >          Nature of address: 3
> > > >>
> > > >>             
> > >          NI: 0
> > > >>             
> > >          Numbering plan: 1
> > > >>             
> > >          Address signals:
> > > >> 01996613358#
> > > >>             
> > >          [ 08 03 10 10 99 66
> > > 31 53
> > > >> f8 ]
> > > >>           
> > >    --OPTIONAL PARMS--
> > > >>
> > > >>           
> > >    Calling Party Number:
> > > >>             
> > >          Nature of address: 4
> > > >>             
> > >          NI: 0
> > > >>             
> > >          Numbering plan: 1
> > > >>             
> > >          Presentation: 0
> > > >>             
> > >          Screening: 0
> > > >>
> > > >>             
> > >          Address signals:
> > > 7773
> > > >>             
> > >          [ 0a 04 04 10 77 37
> > > ]
> > > >>
> > > >> Len = 18 [ af b3 0f c5 d0 38 0e ae 01 00
> 06
> > 12 34
> > > 01 29 01
> > > >> 03 00 ]
> > > >> FSN: 51 FIB 1
> > > >> BSN: 47 BIB 1
> > > >> <[0] MSU
> > > >> [ af b3 0f ]
> > > >>
> > > >>       Network Indicator:
> > > 3 Priority: 0 User Part: ISUP
> > > >> (5)
> > > >>       [ c5 ]
> > > >>       OPC 14392 DPC 14544
> > > SLS 10
> > > >>       [ d0 38 0e ae ]
> > > >>           
> > >    CIC: 1
> > > >>           
> > >    [ 01 00 ]
> > > >>           
> > >    Message Type: ACM
> > > >>
> > > >>           
> > >    [ 06 ]
> > > >>           
> > >    --FIXED LENGTH PARMS[1]--
> > > >>           
> > >    Backward Call Indicator:
> > > >>             
> > >          Charge indicator: 2
> > > >>             
> > >          Called party's
> > > status
> > > >> indicator: 0
> > > >>             
> > >          Called party's
> > > >> category indicator: 1
> > > >>
> > > >>             
> > >          End to End method
> > > >> indicator: 0
> > > >>             
> > >          Interworking
> > > indicator: 0
> > > >>             
> > >          End to End
> > > information
> > > >> indicator: 0
> > > >>             
> > >          ISDN user part
> > > indicator:
> > > >> 1
> > > >>
> > > >>             
> > >          Holding indicator: 0
> > > >>             
> > >          ISDN access
> > > indicator: 1
> > > >>             
> > >          Echo control device
> > > >> indicator: 1
> > > >>             
> > >          SCCP method
> > > indicator: 0
> > > >>             
> > >          [ 12 34 ]
> > > >>
> > > >>           
> > >    --OPTIONAL PARMS--
> > > >>           
> > >    Optional Backward Call Indicator:
> > > >>             
> > >          In-band information
> > > >> indicator: 1
> > > >>             
> > >          Call diversion may
> > > occur
> > > >> indicator: 1
> > > >>             
> > >          Simple segmentation
> > > >> indicator: 0
> > > >>
> > > >>             
> > >          MLPP user indicator:
> > > 0
> > > >>             
> > >          [ 29 01 03 ]
> > > >>
> > > >>   -- DAHDI/1-1 is proceeding
> > > passing it to
> > > >> Local/01996613358 at llamada-1bb8;2
> > > >> Len = 17 [ af b4 0e c5 d0 38 0e ae 01 00
> 09
> > 01 11
> > > 02 16 34
> > > >> 00 ]
> > > >>
> > > >> FSN: 52 FIB 1
> > > >> BSN: 47 BIB 1
> > > >> <[0] MSU
> > > >> [ af b4 0e ]
> > > >>       Network Indicator:
> > > 3 Priority: 0 User Part: ISUP
> > > >> (5)
> > > >>       [ c5 ]
> > > >>       OPC 14392 DPC 14544
> > > SLS 10
> > > >>       [ d0 38 0e ae ]
> > > >>           
> > >    CIC: 1
> > > >>
> > > >>           
> > >    [ 01 00 ]
> > > >>           
> > >    Message Type: ANM
> > > >>           
> > >    [ 09 ]
> > > >>           
> > >    --OPTIONAL PARMS--
> > > >>           
> > >    Backward Call Indicator:
> > > >>             
> > >          Charge indicator: 2
> > > >>             
> > >          Called party's
> > > status
> > > >> indicator: 1
> > > >>
> > > >>             
> > >          Called party's
> > > >> category indicator: 1
> > > >>             
> > >          End to End method
> > > >> indicator: 0
> > > >>             
> > >          Interworking
> > > indicator: 0
> > > >>             
> > >          End to End
> > > information
> > > >> indicator: 0
> > > >>
> > > >>             
> > >          ISDN user part
> > > indicator:
> > > >> 1
> > > >>             
> > >          Holding indicator: 0
> > > >>             
> > >          ISDN access
> > > indicator: 1
> > > >>             
> > >          Echo control device
> > > >> indicator: 1
> > > >>             
> > >          SCCP method
> > > indicator: 0
> > > >>
> > > >>             
> > >          [ 11 02 16 34 ]
> > > >>
> > > >>   -- DAHDI/1-1 answered
> > > Local/01996613358 at llamada-1bb8;2
> > > >>   -- Launching SendDTMF(9876543210)
> > > on
> > > >> Local/01996613358 at llamada-1bb8;1
> > > >>  == Spawn extension (llamada,
> 01996613358,
> > 2)
> > > exited
> > > >> non-zero on
> > > >>
> > > >> 'Local/01996613358 at llamada-1bb8;2'
> > > >> Len = 16 [ b4 b0 0d c5 38 38 34 1e 01 00
> 0c
> > 02 00
> > > 02 81 90
> > > >> ]
> > > >> FSN: 48 FIB 1
> > > >> BSN: 52 BIB 1
> > > >>> [0] MSU
> > > >>   -- Hungup 'DAHDI/1-1'
> > > >> [ b4 b0 0d ]
> > > >>       Network Indicator:
> > > 3 Priority: 0 User Part: ISUP
> > > >> (5)
> > > >>
> > > >>       [ c5 ]
> > > >>       OPC 14544 DPC 14392
> > > SLS 1
> > > >>       [ 38 38 34 1e ]
> > > >>           
> > >    CIC: 1
> > > >>           
> > >    [ 01 00 ]
> > > >>           
> > >    Message Type: REL
> > > >>           
> > >    [ 0c ]
> > > >>           
> > >    --VARIABLE LENGTH PARMS[1]--
> > > >>
> > > >>           
> > >    Cause Indicator:
> > > >>             
> > >          Coding Standard: 0
> > > >>             
> > >          Location: 1
> > > >>             
> > >          Cause Class: 1
> > > >>             
> > >          Cause Subclass: 0
> > > >>             
> > >          Cause: Normal call
> > > >> clearing (16)
> > > >>
> > > >>             
> > >          [ 02 81 90 ]
> > > >>
> > > >> Len = 12 [ b0 b5 09 c5 d0 38 0e ae 01 00
> 10
> > 00 ]
> > > >> FSN: 53 FIB 1*CLI>
> > > >> BSN: 48 BIB 1*CLI>
> > > >> <[0] MSUvoice*CLI>
> > > >> [ b0 b5 09 ]e*CLI>
> > > >> pelxsms2Network Indicator: 3 Priority:
> 0
> > User
> > > Part: ISUP
> > > >> (5)
> > > >>
> > > >> pelxsms2[ c5 ]CLI>
> > > >> pelxsms2OPC 14392 DPC 14544 SLS 10
> > > >> pelxsms2[ d0 38 0e ae ]
> > > >> pelxsms2voice*CLCIC: 1
> > > >> pelxsms2voice*CL[ 01 00 ]
> > > >> pelxsms2voice*CLMessage Type: RLC
> > > >> pelxsms2voice*CL[ 10 ]
> > > >> pelxsms2voice*CLI>
> > > >>
> > > >> Len = 18 [ b0 b6 0f c1 d0 f8 0f 0e 11 80
> 87
> > 88 89
> > > 8a 8b 8c
> > > >> 8d 8e ]
> > > >> FSN: 54 FIB 1
> > > >> BSN: 48 BIB 1
> > > >> <[0] MSU
> > > >> [ b0 b6 0f ]
> > > >>       Network Indicator:
> > > 3 Priority: 0 User Part:
> > > >> STD_TEST (1)
> > > >>       [ c1 ]
> > > >>       OPC 14399 DPC 14544
> > > SLS 0
> > > >>
> > > >>       [ d0 f8 0f 0e ]
> > > >>       H0: 1 H1: 1
> > > >>       [ 11 ]
> > > >>
> > > >> Len = 18 [ b6 b1 0f c1 3f 38 34 0e 21 80
> 87
> > 88 89
> > > 8a 8b 8c
> > > >> 8d 8e ]
> > > >> FSN: 49 FIB 1
> > > >> BSN: 54 BIB 1
> > > >>> [0] MSU
> > > >> [ b6 b1 0f ]
> > > >>       Network Indicator:
> > > 3 Priority: 0 User Part:
> > > >> STD_TEST (1)
> > > >>
> > > >>       [ c1 ]
> > > >>       OPC 14544 DPC 14399
> > > SLS 0
> > > >>       [ 3f 38 34 0e ]
> > > >>       H0: 1 H1: 2
> > > >> pelxsms2[ 21 ]CLI>
> > > >>
> > > >>
> > > >> Please, give a hand with that.
> > > >>
> > > >>
> > > >> --
> > > >> Daniel Pizarro Bustamante
> > > >>
> > > >>
> > > >>
> > > >>      ¡Obtén la mejor experiencia
> > > en la web!<
> > > >> Descarga gratis el nuevo Internet
> Explorer 8.
> > http://downloads.yahoo.com/ieak8/?l=e1
> > > >>
> > > >>
> > > >>
> > _______________________________________________
> > > >> --Bandwidth and Colocation Provided by
> http://www.api-digital.com--
> > > >>
> > > >> asterisk-ss7 mailing list
> > > >> To UNSUBSCRIBE or update options visit:
> > > >>
> > > >>   http://lists.digium.com/mailman/listinfo/asterisk-ss7
> > > >>
> > > >>
> > > >>
> > > >> -----Adjunto en línea a
> continuación-----
> > > >>
> > > >>
> > _______________________________________________
> > > >> --Bandwidth and Colocation Provided by
> http://www.api-digital.com--
> > > >>
> > > >> asterisk-ss7 mailing list
> > > >> To UNSUBSCRIBE or update options visit:
> > > >>    http://lists.digium.com/mailman/listinfo/asterisk-ss7
> > > > 
> > > > 
> > > >       ¡Obtén la mejor
> > > experiencia en la web!&lt; Descarga gratis
> el
> > nuevo
> > > Internet Explorer 8. http://downloads.yahoo.com/ieak8/?l=e1
> > > > 
> > > >
> _______________________________________________
> > > > --Bandwidth and Colocation Provided by http://www.api-digital.com--
> > > > 
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¡Obtén la mejor experiencia en la web!
Descarga gratis el nuevo Internet Explorer 8. 
http://downloads.yahoo.com/ieak8/?l=e1



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