Ronald Hartmann
2005-May-26 10:14 UTC
[Asterisk-Users] YET Another echo issue PRI CARD Any help accepted :-)
Good Day all,
I have a Fractional PRI connected to my Asterisk Box via a T100P
card.
When I initiate a call out to phone number 123-8888 the call
sounds great no echo what so ever.
If the person at 123-8888 hangs up and calls me right back (same
handset on both sides) same trunk line
The call always has echo on it. The Asterisk sip extension
hears them selves echoing. The remote party does not notice any
difference.
I have tried all the following.
#define CONFIG_ZAPTEL_MMX <tried this defined and undefined>
Then tried each of the following types of echo cancellations.
#define ECHO_CAN_MARK
#define ECHO_CAN_MARK2 with and without #define
AGGRESSIVE_SUPPRESSOR
#define ECHO_CAN_MARK3
I am completely at a loss on how to get rid of this echo problem. The
system is completely useless for incoming calls, as it currently stands.
Is there a Digium card that handles echo better? Are there any asterisk
compatible cards with hardware echo cancellation available?
Thanks
Ron
[Zapata.conf]
span=1,1,0,esf,b8zs
bchan=19-23 # set this to 1-15,17-31 for E1
dchan=24 # set this to 16 for E1
defaultzone=us
loadzone=us
[Zaptel.conf]
[channels]
language=en
signalling=pri_cpe
switchtype=national
pridialplan=unknown
echocancel=yes
echocancelwhenbridged=yes (tried no)
echotraining=400 (tried 800 also)
usecallerid=yes
callerid=asreceived
overlapdial=yes
immediate=no
group=0,1
context=from-pstn
channel => 19-23
Michael D Schelin
2005-May-26 10:32 UTC
[Asterisk-Users] YET Another echo issue PRI CARD Any help accepted :-)
Hello, I too am having an echo issues. My partner an I have discussed this in depth and believe that digital circuits can not create the echo problem. It's when it hits the Analog network or in my cases ATA's that are having echo problems. I have another gateway that does not have any echo on the same Sipura ATA's. I have also notices that the Asterisk levels are very hot from T1-PRI to Sip. I have not had the chance to turn them down but I think this is where my echo problem is occurring because the Digital levels are too much for the ATA to convert. I will let you know if I find this to be true. Michael Schelin / ShellTel Ronald Hartmann wrote:>Good Day all, > > I have a Fractional PRI connected to my Asterisk Box via a T100P >card. > > When I initiate a call out to phone number 123-8888 the call >sounds great no echo what so ever. > > If the person at 123-8888 hangs up and calls me right back (same >handset on both sides) same trunk line > The call always has echo on it. The Asterisk sip extension >hears them selves echoing. The remote party does not notice any >difference. > > I have tried all the following. > > #define CONFIG_ZAPTEL_MMX <tried this defined and undefined> > > Then tried each of the following types of echo cancellations. > > #define ECHO_CAN_MARK > #define ECHO_CAN_MARK2 with and without #define >AGGRESSIVE_SUPPRESSOR > #define ECHO_CAN_MARK3 > >I am completely at a loss on how to get rid of this echo problem. The >system is completely useless for incoming calls, as it currently stands. >Is there a Digium card that handles echo better? Are there any asterisk >compatible cards with hardware echo cancellation available? > >Thanks > >Ron > > [Zapata.conf] > span=1,1,0,esf,b8zs > bchan=19-23 # set this to 1-15,17-31 for E1 > dchan=24 # set this to 16 for E1 > > defaultzone=us > loadzone=us > > [Zaptel.conf] >[channels] >language=en > >signalling=pri_cpe >switchtype=national >pridialplan=unknown >echocancel=yes >echocancelwhenbridged=yes (tried no) >echotraining=400 (tried 800 also) >usecallerid=yes >callerid=asreceived >overlapdial=yes >immediate=no >group=0,1 >context=from-pstn >channel => 19-23 > > > >_______________________________________________ >Asterisk-Users mailing list >Asterisk-Users@lists.digium.com >http://lists.digium.com/mailman/listinfo/asterisk-users >To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > > >
Andrew Kohlsmith
2005-May-26 10:35 UTC
[Asterisk-Users] YET Another echo issue PRI CARD Any help accepted :-)
On May 26, 2005 01:14 pm, Ronald Hartmann wrote:> #define CONFIG_ZAPTEL_MMX <tried this defined and undefined> > > Then tried each of the following types of echo cancellations. > > #define ECHO_CAN_MARK > #define ECHO_CAN_MARK2 with and without #define > AGGRESSIVE_SUPPRESSOR > #define ECHO_CAN_MARK3Try a stock zaptel makefile and zconfig.h with the following: makefile: - under "stuff is now in zconfig.h" there are a pair of KFLAGS/CFLAGS settings. Add KFLAGS+=-march=pentium4 CFLAGS+=-march=pentium4 (or whatever your processor is) under them. in zconfig.h enable MMX but leave everything else alone. Build and install. I used to have strange echo problems like that but they have disappeared. I also compile Asterisk proper with PROC=pentium4 since a lot of the DSP (but *not* the echo can) is done in Asterisk proper. Digium *does* have a TE405P with a hardware echo canceller module on it. They do not have this option for single spans, although you could hook up a normal T1 echo canceller from people such as Tellabs. I don't profess to know WHY this seems to help me, but it does. It shouldn't, especially when it works just fine in one direction but not the other. -A.
jjones@quiddesign.com
2005-May-26 14:13 UTC
[Asterisk-Users] YET Another echo issue PRI CARD Any help accepted :-)
Couple thoughts. first - I hope you have reversed your files listed and zaptel is really zapata and vice versa second - always stop and start * when making changes to zapata - reload does not cut it - (some experience here) third - I wound up with a fairly echo free system using the software echo cancel within * but it was not good enough for a commercial application. I opted out for hardware echo cancelling via DSP and spent the bucks. They have been very good and I was able to turn off on * and reduce its load. My largest intermittant source of echo was traceable to various LEC/ IXC who were clueless on proper installation procedures. I was able to work with some to remedy but having them keep popping up and receiving customer complaints made it worth spending the $$$. good luck On May 26, 2005, at 12:14 PM, Ronald Hartmann wrote:> Good Day all, > > I have a Fractional PRI connected to my Asterisk Box via a T100P > card. > > When I initiate a call out to phone number 123-8888 the call > sounds great no echo what so ever. > > If the person at 123-8888 hangs up and calls me right back (same > handset on both sides) same trunk line > The call always has echo on it. The Asterisk sip extension > hears them selves echoing. The remote party does not notice any > difference. > > I have tried all the following. > > #define CONFIG_ZAPTEL_MMX <tried this defined and undefined> > > Then tried each of the following types of echo cancellations. > > #define ECHO_CAN_MARK > #define ECHO_CAN_MARK2 with and without #define > AGGRESSIVE_SUPPRESSOR > #define ECHO_CAN_MARK3 > > I am completely at a loss on how to get rid of this echo problem. The > system is completely useless for incoming calls, as it currently > stands. > Is there a Digium card that handles echo better? Are there any > asterisk > compatible cards with hardware echo cancellation available? > > Thanks > > Ron > > [Zapata.conf] > span=1,1,0,esf,b8zs > bchan=19-23 # set this to 1-15,17-31 for E1 > dchan=24 # set this to 16 for E1 > > defaultzone=us > loadzone=us > > [Zaptel.conf] > [channels] > language=en > > signalling=pri_cpe > switchtype=national > pridialplan=unknown > echocancel=yes > echocancelwhenbridged=yes (tried no) > echotraining=400 (tried 800 also) > usecallerid=yes > callerid=asreceived > overlapdial=yes > immediate=no > group=0,1 > context=from-pstn > channel => 19-23 > > > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > >
jjones@quiddesign.com
2005-May-26 14:57 UTC
[Asterisk-Users] YET Another echo issue PRI CARD Any help accepted :-)
Since I have had multiple requests I am posting my supplier here. Hope this is not off topic but they really helped me out and others seem to be interested. Vendor = ditech communications Product I used was their Quad 2 T1, link is below http://www.ditechcom.com/platforms/tdmEchoCancellers.html you may contact the salesman I used at ddingwall@ditechcom.com On May 26, 2005, at 4:13 PM, jjones@quiddesign.com wrote:> Couple thoughts. > > first - I hope you have reversed your files listed and zaptel is > really zapata and vice versa > > second - always stop and start * when making changes to zapata - > reload does not cut it - (some experience here) > > third - I wound up with a fairly echo free system using the > software echo cancel within * but it was not good enough for a > commercial application. I opted out for hardware echo cancelling > via DSP and spent the bucks. They have been very good and I was > able to turn off on * and reduce its load. > > My largest intermittant source of echo was traceable to various LEC/ > IXC who were clueless on proper installation procedures. I was able > to work with some to remedy but having them keep popping up and > receiving customer complaints made it worth spending the $$$. > > good luck > > > On May 26, 2005, at 12:14 PM, Ronald Hartmann wrote: > > >> Good Day all, >> >> I have a Fractional PRI connected to my Asterisk Box via a T100P >> card. >> >> When I initiate a call out to phone number 123-8888 the call >> sounds great no echo what so ever. >> >> If the person at 123-8888 hangs up and calls me right back (same >> handset on both sides) same trunk line >> The call always has echo on it. The Asterisk sip extension >> hears them selves echoing. The remote party does not notice any >> difference. >> >> I have tried all the following. >> >> #define CONFIG_ZAPTEL_MMX <tried this defined and undefined> >> >> Then tried each of the following types of echo cancellations. >> >> #define ECHO_CAN_MARK >> #define ECHO_CAN_MARK2 with and without #define >> AGGRESSIVE_SUPPRESSOR >> #define ECHO_CAN_MARK3 >> >> I am completely at a loss on how to get rid of this echo problem. The >> system is completely useless for incoming calls, as it currently >> stands. >> Is there a Digium card that handles echo better? Are there any >> asterisk >> compatible cards with hardware echo cancellation available? >> >> Thanks >> >> Ron >> >> [Zapata.conf] >> span=1,1,0,esf,b8zs >> bchan=19-23 # set this to 1-15,17-31 for E1 >> dchan=24 # set this to 16 for E1 >> >> defaultzone=us >> loadzone=us >> >> [Zaptel.conf] >> [channels] >> language=en >> >> signalling=pri_cpe >> switchtype=national >> pridialplan=unknown >> echocancel=yes >> echocancelwhenbridged=yes (tried no) >> echotraining=400 (tried 800 also) >> usecallerid=yes >> callerid=asreceived >> overlapdial=yes >> immediate=no >> group=0,1 >> context=from-pstn >> channel => 19-23 >> >> >> >> _______________________________________________ >> Asterisk-Users mailing list >> Asterisk-Users@lists.digium.com >> http://lists.digium.com/mailman/listinfo/asterisk-users >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> >> >> >> > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > >