[asterisk-users] strange transcoding values

[Gianluca Baù]

>> On Tue, 13 Oct 2009, Gianluca Baù wrote:

>> Hello guys,
>> i have a question about a voip gateway we use.
>> I saw those values typing in cli:
>>
>> core show translation
>>
>>           g723   gsm  ulaw  alaw g726aal2 adpcm  slin lpc10  g729 speex  ilbc  g726  g722 slin16
>>     g723     -     -     -     -        -     -     -     -     -     -     -     -     -      -
>>      gsm     -     -  2001  2001     6000  2001  2000 16000     - 34002     -  6000  4000  10000
>>     ulaw     -  6001     -     1     4001     2     1 14001     - 32003     -  4001  2001   8001
>>     alaw     -  6001     1     -     4001     2     1 14001     - 32003     -  4001  2001   8001
>> g726aal2     - 10000  4001  4001        -  4001  4000 18000     - 36002     -     1  6000  12000
>>    adpcm     -  6001     2     2     4001     -     1 14001     - 32003     -  4001  2001   8001
>>     slin     -  6000     1     1     4000     1     - 14000     - 32002     -  4000  2000   8000
>>    lpc10     - 10000  4001  4001     8000  4001  4000     -     - 36002     -  8000  6000  12000
>>     g729     -     -     -     -        -     -     -     -     -     -     -     -     -      -
>>    speex     - 10000  4001  4001     8000  4001  4000 18000     -     -     -  8000  6000  12000
>>     ilbc     -     -     -     -        -     -     -     -     -     -     -     -     -      -
>>     g726     - 10000  4001  4001        1  4001  4000 18000     - 36002     -     -  6000  12000
>>     g722     - 14001  8002  8002    12001  8002  8001 22001     - 40003     - 12001     -   6000
>>   slin16     - 22001 16002 16002    20001 16002 16001 30001     - 48003     - 20001  8000      -
>>
>> Do you think it is normal? Could be this values symptom of a problem on the server?
>> We have some voice quality problems in our voip network.
>>
>> I have to say that this gateway at the moment is not assigned to perform transcoding (i'd like it did it since its is a good hardware) but this values seems strange to me. In others servers i have very minor values.
>>
>> It is assigned to the last part of our voice network and it send traffic in alaw via sip to our isp.
>> Its load in not heavy, it never handles more than 20 simultaneously calls.
>>
>> The machine is a 4 cpu Xeon(TM) CPU 3.06GHz with 2 Gb of ram one Wildcard TE405P quad-span T1/E1/J1
>>
>> Linux is a Debian 5
>>
>> Linux gw-01 2.6.26-1-686 #1 SMP Fri Mar 13 18:08:45 UTC 2009 i686 GNU/Linux
>>
>> Asterisk is
>>
>> gw-e1-01*CLI> core show version
>> Asterisk 1.6.0.15 built by root @ gw-01 on a i686 running Linux on 2009-09-24 08:41:26 UTC
>> gw-e1-01*CLI>
>>
>> Dahdi is
>>
>> dahdi-linux-2.2.0.2
>> dahdi-tools-2.2.0
>> libpri-1.4.10.1
>>
>> (upgraded today to see changes)
>>
>> Thanks for yours indications, regards
>>
>> Gianluca
>>

> Hi,
>
> Your other boxes are probably pre 1.6.  Values are now printed in 
> microseconds rather than milliseconds.
>
> j

Hi Jeff,
thanks for your interest.

This is a core show translation from another server with asterisk 1.6.0.6 (the same older version of the other servers which gives to me the same strange results)

The server is an Intel(R) Pentium(R) Dual  CPU  E2180  @ 2.00GHz with 1Gb of ram

mediaswitch*CLI> core show translation
         Translation times between formats (in microseconds) for one second of data
          Source Format (Rows) Destination Format (Columns)

           g723   gsm  ulaw  alaw g726aal2 adpcm  slin lpc10  g729 speex  ilbc  g726  g722 slin16
     g723     -     -     -     -        -     -     -     -     -     -     -     -     -      -
      gsm     -     -     2     2        3     2     1     2     -     -     -     2     2      3
     ulaw     -  4001     -     1        3     2     1     2     -     -     -     2     2      3
     alaw     -  4001     1     -        3     2     1     2     -     -     -     2     2      3
 g726aal2     -  4001     2     2        -     2     1     2     -     -     -     1     2      3
    adpcm     -  4001     2     2        3     -     1     2     -     -     -     2     2      3
     slin     -  4000     1     1        2     1     -     1     -     -     -     1     1      2
    lpc10     -  4001     2     2        3     2     1     -     -     -     -     2     2      3
     g729     -     -     -     -        -     -     -     -     -     -     -     -     -      -
    speex     -     -     -     -        -     -     -     -     -     -     -     -     -      -
     ilbc     -     -     -     -        -     -     -     -     -     -     -     -     -      -
     g726     -  4002     3     3        1     3     2     3     -     -     -     -     3      4
     g722     -  4001     2     2        3     2     1     2     -     -     -     2     -      1
   slin16     -  4002     3     3        4     3     2     3     -     -     -     3     1      -

It seems to be better than the other one...

Do you have any ideas?

Thanks,

Gianluca