asterisk users - May 2014 - "transmit_silence" not properly recognized on 1.8 ?

Hello,

I've got a problem at the moment, that setting "transmit_silence =
yes"
seems to have no effect on Asterisk 1.8-Certified.

Although it's enabled and "core show settings" confirms, that it
is
really enabled, there are no RTP packets sent by Asterisk when waiting
for DMTF input or when "Wait()" is called.
Also, there seems to be a small gap of 2 or 3 not sent packets when
playing several files one after another.


At the moment I'm using Asterisk 1.8 Certified (Cert 5).



In asterisk.conf I've set:

highpriority = yes
languageprefix = yes
internal_timing = yes
defaultlanguage = de

transmit_silence = yes
transcode_via_sln = yes
documentation_language = en_US



"core show settings" says:

PBX Core settings
-----------------
  Version:                     1.8.15-cert5
  Build Options:               DONT_OPTIMIZE, LOADABLE_MODULES,
BUILD_NATIVE, G711_NEW_ALGORITHM, G711_REDUCED_BRANCHING, TEST_CODING_TABLES
  Maximum calls:               Not set
  Maximum open file handles:   Not set
  Verbosity:                   8
  Debug level:                 0
  Maximum load average:        0.000000
  Minimum free memory:         0 MB
  Startup time:                21:29:18
  Last reload time:            21:29:18
  System:                      Linux/3.2.0-4-amd64 built by root on
x86_64 2014-05-24 18:42:53 UTC
  System name:
  Entity ID:                   00:25:xx:xx:xx:xx
  Default language:            de
  Language prefix:             Enabled
  User name and group:         xxxx / xxxxxxx
  Executable includes:         Disabled
  Transcode via SLIN:          Enabled
  Internal timing:             Enabled
  Transmit silence during rec: Enabled
  Generic PLC:                 Enabled





Is there anything I could do for forcing transmitting silence without
stopping sending RTP packets?
Maybe this would solve the "issue" with the packet gaps between
playbacks also.


Greetings
 Max

On Sat, May 24, 2014 at 3:03 PM, Maximilian Grobecker
<m.grobecker at portunity.de> wrote:
> Hello,
>
> I've got a problem at the moment, that setting "transmit_silence =
yes"
> seems to have no effect on Asterisk 1.8-Certified.
>
> Although it's enabled and "core show settings" confirms, that
it is
> really enabled, there are no RTP packets sent by Asterisk when waiting
> for DMTF input or when "Wait()" is called.
> Also, there seems to be a small gap of 2 or 3 not sent packets when
> playing several files one after another.
>
>
<snip>

Without looking at a DEBUG log, I'm not sure what anyone can tell you.
Wait does call ast_safe_sleep_conditional, which enables a silence
generator on the channel if (a) there is no generator on the channel
and (b) ast_opt_transmit_silence is true (which it should be based on
your configuration):

    /* If no other generator is present, start silencegen while waiting */
    if (ast_opt_transmit_silence && !chan->generatordata) {
        silgen = ast_channel_start_silence_generator(chan);
    }

Starting a silence generator should emit a debug level 1 message
indicating that it has started. If your log doesn't show that, then
there may be another generator present that is preventing silence from
kicking off.

-- 
Matthew Jordan
Digium, Inc. | Engineering Manager
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org