[asterisk-bugs] [Asterisk 0015386]: 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:                     assigned
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:              
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Date Submitted:             2009-06-23 20:15 CDT
Last Modified:              2009-06-23 20:54 CDT
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Summary:                    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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 (0106889) rue_mohr (reporter) - 2009-06-23 20:54
 https://issues.asterisk.org/view.php?id=15386#c106889 
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As per russell, the following was discovered:

; -00.42dbm (close enough!)
exten => 406,1,Answer()
exten => 406,n,milliwatt(o)

; -11dbm
exten => 407,1,Answer()
exten => 407,n,PlayTones(1000/1000)
exten => 407,n,Wait(3600);

; -11dbm
exten => 408,1,Answer();
exten => 408,n,milliwatt() 

Issue History 
Date Modified    Username       Field                    Change               
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2009-06-23 20:54 rue_mohr       Note Added: 0106889                          
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