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dahdi.conf.sample: Add description for "buffers" setting.

Browse Source 
This contains an edited version of the patch originally created by John
Bigelow.

(closes issue ASTERISK-14435)
Reported by: John Bigelow
Patches:
      buffers.patch (license #5091) patch uploaded by John Bigelow
      0001-dahdi.conf.sample-Add-description-for-buffers-settin.patch (license #5417) patch uploaded by Shaun Ruffell
      Modified
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Merged revisions 374727 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 374728 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 374729 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@374730 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Richard Mudgett
2012-10-08 22:31:09 +00:00
parent ab548bb0ce
commit 3e1d2917bb
1 changed files with 27 additions and 0 deletions
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27
configs/chan_dahdi.conf.sample
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@@ -1051,6 +1051,33 @@ pickupgroup=1
; ;
;faxbuffers=>6,full ;faxbuffers=>6,full
; ;
; Configure the default number of DAHDI buffers and the transmit policy to use.
; This can be used to eliminate data drops when scheduling jitter prevents
; Asterisk from writing to a DAHDI channel regularly. Most users will probably
; want "faxbuffers" instead of "buffers".
;
; The policies are:
; immediate - DAHDI will immediately start sending the data to the hardware after
; Asterisk writes to the channel. This is the default mode. It
; introduces the least amount of latency but has an increased chance for
; hardware under runs if Asterisk is not able to keep the DAHDI write
; queue from going empty.
; half - DAHDI will wait until half of the configured buffers are full before
; starting to transmit. This adds latency to the audio but reduces
; the chance of under runs. Essentially, this is like an in-kernel jitter
; buffer.
; full - DAHDI will not start transmitting until all buffers are full.
; Introduces the most amount of latency and is susceptible to over
; runs from the Asterisk process.
;
; The receive policy is never changed. DAHDI will always pass up audio as soon
; as possible.
;
; The default number of buffers is 4 (from jitterbuffers) and the default policy
; is immediate.
;
;buffers=4,immediate
;
; This option specifies what to do when the channel's bridged peer puts the ; This option specifies what to do when the channel's bridged peer puts the
; ISDN channel on hold. Settable per logical ISDN span. ; ISDN channel on hold. Settable per logical ISDN span.
; moh: Generate music-on-hold to the remote party. ; moh: Generate music-on-hold to the remote party.