[asterisk-bugs] [JIRA] (ASTERISK-28518) chan_dahdi: Caller ID FSK Erroneously Sent when Picking Up Dahdi Call On Hold

[Andrew Siplas (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-28518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=249466#comment-249466 ] 

Andrew Siplas commented on ASTERISK-28518:
------------------------------------------

I can confirm this behavior—it only seems to occur the first time the held call is picked up (when ringing back—if leaving the phone at dialtone about chan_dahdi.c:9847 this does not occur).

The only way I could reproduce with WCTDM24XXP was on ringback and only occurred the first time the held call was picked up again—does not occur on subsequent flash→hold→hangup→ringback→answer and also does not occur on flash→hold→flash→resume.

> chan_dahdi: Caller ID FSK Erroneously Sent when Picking Up Dahdi Call On Hold
> -----------------------------------------------------------------------------
>
>                 Key: ASTERISK-28518
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28518
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_dahdi
>    Affects Versions: 13.27.0
>         Environment: DAHDI Version: 2.10.2
>            Reporter: Josh Alberts
>            Assignee: Unassigned
>            Severity: Minor
>
> Asterisk is frequently and improperly sending Caller ID FSK when a Dahdi channel (fxo_ks) is picked back up after being put on hold.  Here is the scenario: 
> 1) A call comes in to a Dahdi channel, and is picked up
> 2) The Dahdi channel flashes and receives a new dial tone
> 3) The Dahdi channel hangs up to place the call on hold.  The Dahdi channel rings while the call is being held.
> 4) The Dahdi channel picks back up to resume the call
> 5) Caller ID FSK is spilled out, and is only heard by the Dahdi channel, and not the other end.  This shouldn't be happening.
> 6) The Dahdi channel is connected back to the caller



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