On Mon, May 03, 2004 at 09:28:56PM +1000, Adam Goryachev wrote: > Firstly, the problem... > > Ever since I installed and setup asterisk, I have had various problems, > initially it was echo caused by the ISDN (isdn4linux) card I was using. > So, I upgraded to the X101P from digium. I still had echo, so I figured > it was also caused by the ATA186 (cisco) I was using. So, I upgraded > again to the TDM40B quad FXS card. This solved pretty much all my > problems, except eventually, I needed more incoming lines. So, again, I > upgraded to a digital line (10 channel PRI/E1) and purchased the brand > new TE405p from digium... Now, eventually I got this working properly, > for incoming and outbound calls, I have incoming callerid working, > etc... > > However, ever since I did this, I continually get complaints from people > about how terrible my phone lines are. Not *everyone* complains, but > most people do.... >
We did face what may be the same problem here. The problem came from the fact that on some motherboards (well, *most* motherboards, as far as I tested), the TE405P has a problem which makes it send every one in 8 (or was it 16?) bytes as 0xFF (instead of whatever the U/A-law value may have been). On the RX side of things, it was always perfect, thus when connecting to a local IP phone we heard a nice sound, but the remote party always had a quite garbled output. You can check it quite easily : - plug a crossover cable between two ports - do not start Asterisk (but load and ztcfg everything) - cat /dev/zap/span1/1 on one terminal - ls >/dev/zap/span2/1 on another terminal (provided that spans 1 and 2 are connected together) - if everything works well, you should have a perfect output for your ls on the "cat" terminal. Otherwise, try hexdump and watch the columns with FF. It was solved by using a PCI 2.2 compliant motherboard (i865 based). It's quite an odd behaviour, and it's still not clear to me why it happens. I initialiy thought it could be solved by fixing the FPGA VHDL, but I'm not an expert in that field. -- Nicolas Bougues Axialys Interactive _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users