search for: 15db

Hello list... 1) Is there an IAX softphone that supports any kind of voicemail indicator? 2) I have 2 TDM400Ps installed in a system. I need the audio on the analog phone (FXS modules) to be amplified somewhere between 10 and 15db so I set rxgain and txgain to 15 for the FXO interfaces and FXS interfaces. When a call comes in on the FXO at this setting, the call sometimes has about 20 seconds of loud noise that sounds like it might be music in the background. The problem is intermittent. Any ideas on how to solve this one? W...

...appropriate url) of LBO as per the zaptel configuration file? # The line build-out (or LBO) is an integer, from the following table: # 0: 0 db (CSU) / 0-133 feet (DSX-1) # 1: 133-266 feet (DSX-1) # 2: 266-399 feet (DSX-1) # 3: 399-533 feet (DSX-1) # 4: 533-655 feet (DSX-1) # 5: -7.5db (CSU) # 6: -15db (CSU) # 7: -22.5db (CSU) -- ========================================== Rod Bacon Empowered Communications Ground Floor, 102 York St. South Melbourne Victoria, Australia. 3205 Phone: +613 99401600 Fax: +613 99401650 FWD: 512237 ICQ: 5662270 ===================================...

....xiph.org/pipermail/speex-dev/2007-March/005390.html > There is another record set in the file(Capture2.zip) which I got 141 > sample delay and drift of 14. > I did not record this file so I don't know if it is from the same > sound card. The PC simulation > only gets about 10 to 15db ERLE. It could be also a linearity issue. > > On 3/22/07, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote: >> > Thanks for the great work. It indeed helps to diagnose of echo >> > canceller and narrow down the >> > problem area. >> >> Good...

> Thanks for the great work. It indeed helps to diagnose of echo > canceller and narrow down the > problem area. Good, so it worked for you? > I am not an expert in the signaling processing but I > wonder if it is possible > to add the linearity check in the echo_diagnostic function? Theoretically, yes. In practice, I'm not sure how accurate it would be. Do you have any

...1.zip) is in http://lists.xiph.org/pipermail/speex-dev/2007-March/005390.html There is another record set in the file(Capture2.zip) which I got 141 sample delay and drift of 14. I did not record this file so I don't know if it is from the same sound card. The PC simulation only gets about 10 to 15db ERLE. It could be also a linearity issue. On 3/22/07, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote: > > Thanks for the great work. It indeed helps to diagnose of echo > > canceller and narrow down the > > problem area. > > Good, so it worked for you? > &...

I'm working on an Asterisk system with all of it's PRI ports configured with the LBO setting at 5, like this: span=3,0,5,esf,b8zs As of yet, I am unwilling to change the LBO to 0 to where it probably should be because the system is working and I'm not sure exactly what the LBO does. I'm aware some changes were made to deal with low audio levels. Does anybody know what audio

...or wrongly) be > horrified if you told them all their music was suddenly 8 bits. Turning up the > volume cannot correct for that, although applying a preamp gain could. Are you sure? 8 unused bits require gain equal to -48 dB. Gain values for very loud over-compressed tracks are only -10...-15dB, so only 2...2.5 bits are 'unused'. > Music players that have adopted R128 or are planning it have often adjusted it > by several dB to avoid the "too quiet" issue. With no standard in place > concerning this and R128 itself being revised it isn't at all clear ju...

Hi, I searched the Internet to find an answers, but I didn't find anything useful, so I'm turning to you, maybe someone has the answer. I want to make a realtime broadcast from a Linux box. The source is the soundcard's line-in, and it sends the stream to an Icecast server. I would like to have realtime compressor/limiter functionalities on this Linux box, so the outgoing signal

...far as I can tell, the delay between echo_frame and input_frame is consistent and about 10ms. I would assumethe synchronization is not a problem. And I also have some other echo recording files which has almost 0db echo return loss and about 20ms consistent delay. The EC can achieve about 10 to 15db echo return loss enhancement in this case. Is it normal? I would think 25+ db ERLE plus 15+ NLP/ES should make the residual echo inaudible. I am not sure about the nonlinearity of those recording files but I would appreciate it if you could take a look of those. I uploaded them to http://www.s...

..., it&#39;s an integer value from the following<br> table:<br> <br> 0: 0 db (CSU) / 0-133 feet (DSX-1)<br> 1: 133-266 feet (DSX-1)<br> 2: 266-399 feet (DSX-1)<br> 3: 399-533 feet (DSX-1)<br> 4: 533-655 feet (DSX-1)<br> 5: -7.5db (CSU)<br> 6: -15db (CSU)<br> 7: -22.5db (CSU)<br> <br> As I understand it, the LBO is effectively an attenuation value, with a<br> higher number meaning less attenuation. =A0This way, you don&#39;t get too = hot<br> of a signal with a short cable, or two low of a signal on long cable...

...far as I can tell, the delay between echo_frame and input_frame is consistent and about 10ms. I would assumethe synchronization is not a problem. And I also have some other echo recording files which has almost 0db echo return loss and about 20ms consistent delay. The EC can achieve about 10 to 15db echo return loss enhancement in this case. Is it normal? I would think 25+ db ERLE plus 15+ NLP/ES should make the residual echo inaudible. I am not sure about the nonlinearity of those recording files but I would appreciate it if you could take a look of those. I uploaded them to http://www.s...

...r as I can tell, the delay between echo_frame and input_frame is consistent and about 10ms. I would assume the synchronization is not a problem. And I also have some other echo recording files which has almost 0db echo return loss and about 20ms consistent delay. The EC can achieve about 10 to 15db echo return loss enhancement in this case. Is it normal? I would think 25+ db ERLE plus 15+ NLP/ES should make the residual echo inaudible. I am not sure about the nonlinearity of those recording files but I would appreciate it if you could take a look of those. I uploaded them to http://www...

...n further red alerts. NTL, bless them, came out with a test rig and plugged this in the back of my * box and we made a series of test calls which all worked fine, although the NTL chap said the attenuation was out as there was a lot of buzz on the line. He suggested we set the line build out to 6 (-15db) but we were still getting buzz on the test calls - other than that he was happy that the config was correct and as the test rig showed the * box talking properly and making outgoing calls OK we all reckoned that the next time we hooked up to the ISDN line it would be OK. I couldn't do this wit...

...n. # To not use this as a sync source, just use "0" # # The line build-out (or LBO) is an integer, from the following table: # 0: 0 db (CSU) / 0-133 feet (DSX-1) # 1: 133-266 feet (DSX-1) # 2: 266-399 feet (DSX-1) # 3: 399-533 feet (DSX-1) # 4: 533-655 feet (DSX-1) # 5: -7.5db (CSU) # 6: -15db (CSU) # 7: -22.5db (CSU) # # The framing is one of "d4" or "esf" for T1 or "cas" or "ccs" for E1 # # Note: "d4" could be referred to as "sf" or "superframe" # # The coding is one of "ami" or "b8zs" for T1 or...

>The use of R128 also raises the question about "REPLAYGAIN_REFERENCE_LOUDNESS" >tag. Currently flac/metaflac writes "REPLAYGAIN_REFERENCE_LOUDNESS=89.0 dB" >but doesn't use it when decoding (it seems that nothing uses this tag). >R128 defines reference level differently, so this tag makes little sense for >it. IMHO it's better not to write this tag when

...ot use this as a sync source, just use "0" # # The line build-out (or LBO) is an integer, from the following table: # 0: 0 db (CSU) / 0-133 feet (DSX-1) # 1: 133-266 feet (DSX-1) # 2: 266-399 feet (DSX-1) # 3: 399-533 feet (DSX-1) # 4: 533-655 feet (DSX-1) # 5: -7.5db (CSU) # 6: -15db (CSU) # 7: -22.5db (CSU) # # The framing is one of "d4" or "esf" for T1 or "cas" or "ccs" for E1 # # Note: "d4" could be referred to as "sf" or "superframe" # # The coding is one of "ami" or "b8zs" for...

...n. # To not use this as a sync source, just use "0" # # The line build-out (or LBO) is an integer, from the following table: # 0: 0 db (CSU) / 0-133 feet (DSX-1) # 1: 133-266 feet (DSX-1) # 2: 266-399 feet (DSX-1) # 3: 399-533 feet (DSX-1) # 4: 533-655 feet (DSX-1) # 5: -7.5db (CSU) # 6: -15db (CSU) # 7: -22.5db (CSU) # # The framing is one of "d4" or "esf" for T1 or "cas" or "ccs" for E1 # # Note: "d4" could be referred to as "sf" or "superframe" # # The coding is one of "ami" or "b8zs" for T1 or &...

...ot use this as a sync source, just use "0" # # The line build-out (or LBO) is an integer, from the following table: # 0: 0 db (CSU) / 0-133 feet (DSX-1) # 1: 133-266 feet (DSX-1) # 2: 266-399 feet (DSX-1) # 3: 399-533 feet (DSX-1) # 4: 533-655 feet (DSX-1) # 5: -7.5db (CSU) # 6: -15db (CSU) # 7: -22.5db (CSU) # # The framing is one of "d4" or "esf" for T1 or "cas" or "ccs" for E1 # # Note: "d4" could be referred to as "sf" or "superframe" # # The coding is one of "ami" or "b8zs" for...

...n. # To not use this as a sync source, just use "0" # # The line build-out (or LBO) is an integer, from the following table: # 0: 0 db (CSU) / 0-133 feet (DSX-1) # 1: 133-266 feet (DSX-1) # 2: 266-399 feet (DSX-1) # 3: 399-533 feet (DSX-1) # 4: 533-655 feet (DSX-1) # 5: -7.5db (CSU) # 6: -15db (CSU) # 7: -22.5db (CSU) # # The framing is one of "d4" or "esf" for T1 or "cas" or "ccs" for E1 # # Note: "d4" could be referred to as "sf" or "superframe" # # The coding is one of "ami" or "b8zs" for T1 or...

Hi, all I have installed TDM400 with 1 FXS and 1 FXP ports. Now I am goig through documentation on how to configure it. It mentions 3 protocols: Loopstart, Groundstart and Koolstart. Which one do I use? Can someone send me sample zaptel.conf file for Australia? This will save me some time and will be used as a working example. Thanks, Rudolf