[asterisk-bugs] [Asterisk 0015386]: [patch] Milliwatt() is off by -11dbm

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15386 
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Reported By:                rue_mohr
Assigned To:                russell
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Project:                    Asterisk
Issue ID:                   15386
Category:                   Applications/app_milliwatt
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     closed
Asterisk Version:           1.6.1.1 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2009-06-23 20:15 CDT
Last Modified:              2009-08-01 06:04 CDT
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Summary:                    [patch] Milliwatt() is off by -11dbm
Description: 

Confirmed on asterisk 1.4.25.1 and 1.6.1.1 that the milliwatt is about
-11dbm 

Standard PC system, T100P T1 card, to Newbridge Mainstreet 3624
using dahdi-linux-complete-2.1.0.4+2.1.0.2
Debian kernel linux-2.6.28
measured with dbm meter from channelbank

its -11dbm at 1.000kHz, and at 1.004kHz

This can be confirmed because it worked perfectly on same hardware before
software upgrade ( kernel-2.6.15  asterisk-1.2.15  zaptel-1.2.13). 

suspect slinear<->ulaw conversion process, can't confirm.

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 (0108497) svnbot (reporter) - 2009-08-01 06:04
 https://issues.asterisk.org/view.php?id=15386#c108497 
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Repository: asterisk
Revision: 209841

_U  branches/1.6.1/
U   branches/1.6.1/apps/app_milliwatt.c

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r209841 | russell | 2009-08-01 06:04:05 -0500 (Sat, 01 Aug 2009) | 27
lines

Merged revisions 209839 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/trunk

................
  r209839 | russell | 2009-08-01 06:02:07 -0500 (Sat, 01 Aug 2009) | 20
lines
  
  Merged revisions 209838 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r209838 | russell | 2009-08-01 05:59:05 -0500 (Sat, 01 Aug 2009) | 13
lines
    
    Modify how Playtones() is used in Milliwatt() to resolve gain issue.
    
    When Milliwatt() was changed internally to use Playtones() so that the
proper
    tone was used, it introduced a drop in gain in the output signal.  So,
use
    the playtones API directly and specify a volume argument such that the
output
    matches the gain of the original Milliwatt() code.
    
    (closes issue https://issues.asterisk.org/view.php?id=15386)
    Reported by: rue_mohr
    Patches:
          issue_15386.rev2.diff uploaded by russell (license 2)
    Tested by: rue_mohr
  ........
................

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http://svn.digium.com/view/asterisk?view=rev&revision=209841 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-08-01 06:04 svnbot         Checkin                                      
2009-08-01 06:04 svnbot         Note Added: 0108497                          
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