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carles at pina.cat
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 Posted: Tue Apr 22, 2008 6:10 am Post subject: [asterisk-users] Quality problems with ISDN PRI |
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Hello,
We have an Asterisk server with a TE410P Quad-Span togglable E1/T1/J1
card, 3 SPANs configured and OK and one SPAN unconfigured.
In our tests it works fine, but when it has a big laod of calls (say,
from 40 to 60) we have quality problems: some calls has the sound
cut-off (during the call, voice was not stable)
The IRQ card is alone, CPU load was not high, network was fine for sure.
This server is receiving the calls from SIP channels and routing to the
primaries. It's a HP server, multicore, multiCPU.
I'm wondering if someone has had these kind of problems (quality
problems, sound cut off) with 40 and 60 calls but not with 2 or 3, using
Digium cards.
Bit later I will call to Digium but I thought that here there is lot of
people with lot of experience with these cards.
Thank you,
--
Carles Pina i Estany GPG id: 0x8CBDAE64
http://pinux.info Manresa - Barcelona |
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creslin at digium.com
Guest
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| Posted: Wed Apr 23, 2008 9:44 am Post subject: [asterisk-users] Quality problems with ISDN PRI |
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Carles Pina i Estany wrote:
| Quote: | Hello,
We have an Asterisk server with a TE410P Quad-Span togglable E1/T1/J1
card, 3 SPANs configured and OK and one SPAN unconfigured.
In our tests it works fine, but when it has a big laod of calls (say,
from 40 to 60) we have quality problems: some calls has the sound
cut-off (during the call, voice was not stable)
The IRQ card is alone, CPU load was not high, network was fine for sure.
This server is receiving the calls from SIP channels and routing to the
primaries. It's a HP server, multicore, multiCPU.
I'm wondering if someone has had these kind of problems (quality
problems, sound cut off) with 40 and 60 calls but not with 2 or 3, using
Digium cards.
Bit later I will call to Digium but I thought that here there is lot of
people with lot of experience with these cards.
|
There are a number of factors that can contribute to this type of
problem, but probably the best solution is to call support and talk to
them about this.
--
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc. |
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pylinuxian at gmail.com
Guest
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| Posted: Wed Apr 23, 2008 11:04 am Post subject: [asterisk-users] Quality problems with ISDN PRI |
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best solution would be to return quad card & buy 4 single port cards & put 4
servers instead of one ... but i guess this is only possible it you had a
time machine ...
On Wed, Apr 23, 2008 at 2:44 PM, Matthew Fredrickson <creslin at digium.com>
wrote:
| Quote: | Carles Pina i Estany wrote:
| Quote: | Hello,
We have an Asterisk server with a TE410P Quad-Span togglable E1/T1/J1
card, 3 SPANs configured and OK and one SPAN unconfigured.
In our tests it works fine, but when it has a big laod of calls (say,
from 40 to 60) we have quality problems: some calls has the sound
cut-off (during the call, voice was not stable)
The IRQ card is alone, CPU load was not high, network was fine for sure.
This server is receiving the calls from SIP channels and routing to the
primaries. It's a HP server, multicore, multiCPU.
I'm wondering if someone has had these kind of problems (quality
problems, sound cut off) with 40 and 60 calls but not with 2 or 3, using
Digium cards.
Bit later I will call to Digium but I thought that here there is lot of
people with lot of experience with these cards.
|
There are a number of factors that can contribute to this type of
problem, but probably the best solution is to call support and talk to
them about this.
--
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc.
_______________________________________________
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asterisk.org at sedwar...
Guest
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| Posted: Wed Apr 23, 2008 12:12 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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| Quote: | | Quote: | Carles Pina i Estany wrote:
| Quote: |
We have an Asterisk server with a TE410P Quad-Span togglable E1/T1/J1
card, 3 SPANs configured and OK and one SPAN unconfigured.
In our tests it works fine, but when it has a big laod of calls (say,
from 40 to 60) we have quality problems: some calls has the sound
cut-off (during the call, voice was not stable)
|
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On Wed, 23 Apr 2008, linuxian iandsd wrote:
| Quote: | best solution would be to return quad card & buy 4 single port cards & put 4
servers instead of one ... but i guess this is only possible it you had a
time machine ...
|
I disagree.
I have a customer running single te410p's in HP DL-380's (I'm pretty
sure...) with no audio quality complaints.
The DL's only answer, run a couple of AGI's and dial() to a central
"application server."
They frequently "max out" all 94 channels (ISDN PRI NFAS).
Thanks in advance,
------------------------------------------------------------------------
Steve Edwards sedwards at sedwards.com Voice: +1-760-468-3867 PST
Newline Fax: +1-760-731-3000 |
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stotaro at totarotechn...
Guest
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| Posted: Wed Apr 23, 2008 12:52 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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On Tue, Apr 22, 2008 at 7:10 AM, Carles Pina i Estany <carles at pina.cat> wrote:
| Quote: |
Hello,
We have an Asterisk server with a TE410P Quad-Span togglable E1/T1/J1
card, 3 SPANs configured and OK and one SPAN unconfigured.
In our tests it works fine, but when it has a big laod of calls (say,
from 40 to 60) we have quality problems: some calls has the sound
cut-off (during the call, voice was not stable)
The IRQ card is alone, CPU load was not high, network was fine for sure.
This server is receiving the calls from SIP channels and routing to the
primaries. It's a HP server, multicore, multiCPU.
I'm wondering if someone has had these kind of problems (quality
problems, sound cut off) with 40 and 60 calls but not with 2 or 3, using
Digium cards.
Bit later I will call to Digium but I thought that here there is lot of
people with lot of experience with these cards.
Thank you,
|
Just curious, are you recording these calls because that is around the
I/O threshold for audio issues when recording all calls.
Also, you say no network issues but what is the rating of your
switches PPS (often overlooked for speed such as 100mb or 1000mb)?
Thanks,
Steve Totaro |
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pylinuxian at gmail.com
Guest
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| Posted: Wed Apr 23, 2008 1:07 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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| Quote: |
Just curious, are you recording these calls because that is around the
I/O threshold for audio issues when recording all calls.
|
100% right, all recording should (its a must actually) be done in ram drive
then copied to disk later. an asterisk server that do recording should have
enough ram to store the recording ... perhaps 2Gigs that should be emptied
every one hour or two.
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asterisk.org at sedwar...
Guest
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| Posted: Wed Apr 23, 2008 1:11 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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On Wed, 23 Apr 2008, linuxian iandsd wrote:
| Quote: | i have HEARD asterisk wasn't made with the idea to run on multi-core
processors in mind .. the result was that it uses one core all the time ..so
one single P4 3.4 GHZ would perform better than a far more newser quad one.
but i might be wrong. but one thing for sure check hardware compatibility
before you buy anything.
|
"top" says asterisk 1.2.25 is using multiple cores:
top - 11:09:13 up 12 days, 2 min, 1 user, load average: 0.41, 0.58, 0.59
Tasks: 116 total, 1 running, 115 sleeping, 0 stopped, 0 zombie
Cpu0 : 2.7% us, 9.3% sy, 0.0% ni, 87.7% id, 0.0% wa, 0.3% hi, 0.0% si
Cpu1 : 1.7% us, 4.0% sy, 0.0% ni, 94.3% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu2 : 1.3% us, 4.3% sy, 0.0% ni, 94.3% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu3 : 1.3% us, 3.0% sy, 0.0% ni, 95.6% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 2074900k total, 2050112k used, 24788k free, 62216k buffers
Swap: 779144k total, 292k used, 778852k free, 1846184k cached
PID USER PR NI %CPU TIME+ %MEM VIRT RES SHR S COMMAND
7603 root -11 -20 25 8736:33 1.4 71876 28m 3048 S asterisk
7767 mysql 16 0 1 422:02.79 1.2 137m 24m 4192 S mysqld
Thanks in advance,
------------------------------------------------------------------------
Steve Edwards sedwards at sedwards.com Voice: +1-760-468-3867 PST
Newline Fax: +1-760-731-3000 |
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stotaro at totarotechn...
Guest
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| Posted: Wed Apr 23, 2008 1:14 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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On Wed, Apr 23, 2008 at 2:07 PM, linuxian iandsd <pylinuxian at gmail.com> wrote:
| Quote: |
| Quote: | Just curious, are you recording these calls because that is around the
I/O threshold for audio issues when recording all calls.
|
100% right, all recording should (its a must actually) be done in ram drive
then copied to disk later. an asterisk server that do recording should have
enough ram to store the recording ... perhaps 2Gigs that should be emptied
every one hour or two.
|
There are much better solutions than doing a RAM drive. While it may
be stable (not in my experience, I advise using different servers for
different tasks (with redundancy obviously). A phone switch should be
just that, a recording server should also be just that (in demanding
environments).
Thanks,
Steve Totaro |
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pylinuxian at gmail.com
Guest
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creslin at digium.com
Guest
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| Posted: Wed Apr 23, 2008 1:51 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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linuxian iandsd wrote:
| Quote: | i have HEARD asterisk wasn't made with the idea to run on multi-core
processors in mind .. the result was that it uses one core all the time ..so
one single P4 3.4 GHZ would perform better than a far more newser quad one.
but i might be wrong. but one thing for sure check hardware compatibility
before you buy anything.
|
For the purposes of making sure list records are accurate, this in not
true. Asterisk was indeed written with the intention to run on
multi-core systems, and should utilize extra cores just fine.
--
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc. |
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pylinuxian at gmail.com
Guest
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| Posted: Wed Apr 23, 2008 3:04 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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| Quote: |
Asterisk was indeed written with the intention to run on
multi-core systems, and should utilize extra cores just fine.
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Matthew Fredrickson
| Quote: | Software/Firmware Engineer
Digium, Inc.
|
well, i guess i was wrong ... or maybe i had outdated information
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pylinuxian at gmail.com
Guest
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| Posted: Thu Apr 24, 2008 7:40 am Post subject: [asterisk-users] Quality problems with ISDN PRI |
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| Quote: |
There are much better solutions than doing a RAM drive. While it may
be stable (not in my experience, I advise using different servers for
different tasks (with redundancy obviously). A phone switch should be
just that, a recording server should also be just that (in demanding
environments).
|
hi,
still hoping you will give us some insight about remote recording server.
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jra at baylink.com
Guest
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| Posted: Thu Apr 24, 2008 3:45 pm Post subject: [asterisk-users] Quality problems with ISDN PRI |
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On Wed, Apr 23, 2008 at 02:14:27PM -0400, Steve Totaro wrote:
| Quote: | There are much better solutions than doing a RAM drive. While it may
be stable (not in my experience, I advise using different servers for
different tasks (with redundancy obviously). A phone switch should be
just that, a recording server should also be just that (in demanding
environments).
|
That would be fine, if Asterisk was capable of buffering recording
writes, but I'm told it's not; the I/O involved in getting that
recording data off the box in real time is probably worse than that of
putting it onto disk -- disks are usually higher bandwidth channels
than network adapters.
For permanent storage, certainly, the recordings should be moved to
another box, and that's how we do it here.
Cheers,
-- jr '44 byte chunks. Is someone an ATM fan?' a
--
Jay R. Ashworth Baylink jra at baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com '87 e24
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
Those who cast the vote decide nothing.
Those who count the vote decide everything.
-- (Joseph Stalin) |
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stotaro at totarotechn...
Guest
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| Posted: Fri Apr 25, 2008 9:47 am Post subject: [asterisk-users] Quality problems with ISDN PRI |
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On Thu, Apr 24, 2008 at 11:18 AM, Rob Hillis <rob at hillis.dyndns.org> wrote:
| Quote: |
Every CPU core shows up as a separate CPU under Linux. For those that have
hyperthreaded processors, a single core processor will show up as two
processors - assuming you have hyperthreading enabled.
|
That is interesting. I have an intel C2D and I can only see two
procs, not four, is that normal? Are you sure what you are saying is
correct? I am obviously running SMP.
Thanks
Steve totaro |
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support at drdos.info
Guest
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| Posted: Fri Apr 25, 2008 10:10 am Post subject: [asterisk-users] Quality problems with ISDN PRI |
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Steve Totaro wrote:
| Quote: | That is interesting. I have an intel C2D and I can only see two
procs, not four, is that normal? Are you sure what you are saying is
|
I believe Intel removed HyperThreading after it moved over to dual cores.
Doug
--
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety." |
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