Date: Mon, 15 May 2006 12:20:25 +0200 From: =?ISO-8859-1?Q?Dirk_Thannh=E4user?= <dt@dtinnovations.com> To: freebsd-isdn@freebsd.org Subject: Re: Sound delay in i4b Message-ID: <CE5A2D0A-B91D-423C-B1C2-80A74F8EA873@dtinnovations.com> In-Reply-To: <200605150938.28035.hselasky@c2i.net> References: <0CDCE7F4-A7D2-4379-9560-516FFF3350C6@dtinnovations.com> <200605141518.33634.hselasky@c2i.net> <E5B8828C-30ED-43EB-A264-2EA9983F00D9@dtinnovations.com> <200605150938.28035.hselasky@c2i.net>
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On May 15, 2006, at 9:38 AM, Hans Petter Selasky wrote: > Hi, > > On Sunday 14 May 2006 22:57, Dirk Thannh=E4user wrote: >> On May 14, 2006, at 3:18 PM, Hans Petter Selasky wrote: > >>> >>> Do you have SVN installed? >> >> yes i have. I checked out the version which included both, the i4b >> and the chan_capi. Is ist possible that my version was to old? >> I just did a new checkout. >> Subversion says "Checked out revision 264." > > That should be the latest version. It was fixed in "Revision 257", =20 > which was > after that I released Version 1.6.0 in April. Hmm. i compiled the latest release (i4b and chan_capi) yesterday and =20 tested it with the echo test application. The delay is the same as =20 before. When I call the server internal (My Phone -> ISDNCard(NT) -> Asterisk =20= (1.2.4) (isdnd not running. cards set to TE/NT mode via "isdnconfig" =20 command . The delay in the echo test application remains unchanged at =20= about 250ms to half a second. (not measured, it's just my feeling, =20 but i know the difference to the zaptel FreeBSD driver). My machine =20 is a Siemens Scenic L (1.6Ghz/512MB RAM). That schould be enough =20 power to get low latency. How easy would it be to play around with changing latencey. Should i =20 take a look to the chan_capi sources to get latency changed? > >> Are there any "cheap" HFC-4S cards out there for testing? > > There exist some developer kits, but they are not so easy to get a =20 > hand on. > The only place I know that sales HFC-4S are: A developer Kit would be the card of my choice. Does Bero sell them or shoud i contact colognechip? > > http://shop.beronet.com > > And maybe "http://www.junghanns.net/". > >> >> I think that this also means that i am not able to run one card >> (HFC-1S) in slave mode, getting the clock from the other to keep them >> in sync without soldering. > > Yes. > >> For Voice over IP a huger delay might be ok. thats also my opinion. >> but what about Faxing over ISDN. Here I think latency is an important >> issue. (didn't test the CAPI Fax receiption, yet) > > Faxing works, but really you need to use line interconnect to get =20 > faxing > working reliably. Or you can receive the fax in asterisk. That also =20= > works. Does it also work with about 250ms delay? (it exists on both sides =20 from my NT-Card to asterisk and also from the TE-Card to asterisk may be that i did something wrong compiling the sources although i =20 cleaned the BSD sourcetree applied the patches again an then started =20 compiling the get a "fresh" state an no confusion with the older =20 release which was installed before. > > --HPS
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