[Asterisk-Users] Problems with TDM400P card

[Rich Adamson]

Look at the "ms =" statements in the code. I'm trying to rewrite
the code right now to provide something more useful.

------------------------
> Im using RH9 and celerom 1.7 with 256 Mb RAM
> 
> Can you give me the detailed math on your calculations? 
> 
> |-----Original Message-----
> |From: asterisk-users-bounces at lists.digium.com 
> |[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> |Rich Adamson
> |Sent: Sábado, 30 de Abril de 2005 11:07 a.m.
> |To: Asterisk Users Mailing List - Non-Commercial Discussion
> |Subject: RE: RE: [Asterisk-Users] Problems with TDM400P card
> |
> |The way that zttest is written makes it a little difficult to 
> |interpret, but it essentially means that zttest tried to read
> |8192 bytes from the TDM card, and it took more then 1 second 
> |to do it (the objective is exactly 1.00000 seconds, or 100%).
> |The 99.987 numbers says it took something like 1.021111 
> |seconds to read the 8192 bytes instead. Because it took about 
> |21,0000 microseconds too long, frame slips are going to be 
> |happening approximately every 10 seconds. (That's why spandsp 
> |doesn't work
> |right.)
> |I'm not sure (as yet) what the source of the delays are, but 
> |that's what some of us are trying to figure out.
> |
> |What OS distro are you using?
> |
> |------------------------
> |> Hows does this look?
> |> 
> |> Opened pseudo zap interface, measuring accuracy...
> |> 
> |> 8192 samples in 8192 sample intervals 100.000000%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8194 sample intervals 99.975586%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> 8192 samples in 8193 sample intervals 99.987793%
> |> --- Results after 13 passes ---
> |> Best: 100.000000 -- Worst: 99.975586 -- Average: 99.987793
> |> 
> |> Good enough and what do I need to check in order to make 100%? What 
> |> does the test actually measure?
> |> 
> |>  
> |> 
> |> |-----Original Message-----
> |> |From: asterisk-users-bounces at lists.digium.com
> |> |[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Kim 
> |> |Culhan
> |> |Sent: Sábado, 30 de Abril de 2005 08:45 a.m.
> |> |To: asterisk-users at lists.digium.com
> |> |Subject: Re: RE: [Asterisk-Users] Problems with TDM400P card
> |> |
> |> |On Fri, April 29, 2005 4:58 pm, GEOFFREY SACHS said:
> |> |> I would also be interested in alternatives to the Tdm400p. I
> |> |have had
> |> |> endless problems with a tdm400p card not being able to get
> |> |the zttest
> |> |> numbers above
> |> |> 99.975 and as a result not being able eliminate an
> |> |intermitent but consistent echo.
> |> |> I have tried to date 4 different motherboard and hardware
> |> |combinations
> |> |> as well as different linux versions to no avial.I would
> |> |welcome some feedback on this.
> |> |
> |> |Since there appear to be several combinations of hardware and 
> |> |operating system which don't work well, here is a combination which 
> |> |appears to work fairly well:
> |> |
> |> |Intel 925XCV mb
> |> |
> |> |P-4 560 (3.6 gHz)
> |> |
> |> |wcfxs0: <Wildcard TDM400P REV E/F>
> |> |
> |> |FreeBSD 5.4-STABLE
> |> |
> |> |zttest -v
> |> |Opened pseudo zap interface, measuring accuracy...
> |> |
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000%
> |> |8192 samples in 8192 sample intervals 100.000000% ^C
> |> |--- Results after 10 passes ---
> |> |Best: 100.000000 -- Worst: 100.000000 -- Average: 100.000000
> |> |
> |> |hope this helps
> |> |
> |> |-kim
> |> |
> |> |--
> |> |w8hdkim at gmail.com
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