[asterisk-bugs] [JIRA] (DAHLIN-187) [patch] The patch implements "hardhdlc" mode for dahdi_dynamic spans

[Keith Morgan (JIRA)]

     [ https://issues.asterisk.org/jira/browse/DAHLIN-187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Keith Morgan closed DAHLIN-187.
-------------------------------

    Resolution: Won't Fix

> [patch] The patch implements "hardhdlc" mode for dahdi_dynamic spans
> --------------------------------------------------------------------
>
>                 Key: DAHLIN-187
>                 URL: https://issues.asterisk.org/jira/browse/DAHLIN-187
>             Project: DAHDI-Linux
>          Issue Type: New Feature
>          Components: dahdi_dynamic
>    Affects Versions: 2.3.0
>            Reporter: Max Khon
>         Attachments: hardhdlc.diff
>
>
> In hardhdlc mode HDLC frames are transmitted/received in unencoded form in D-channel payload in the following format:
> byte 0: control byte
> bytes 1..7: data chunk (raw HDLC frame data)
> control byte has the following layout:
> bits 0..2: data chunk length
> bit 3: reserved
> bits 4..6: frame status
> bit 7: continuation flag (set when there are more chunks in the current hdlc frame)
> Frame status only has meaning for the last chunk (bit 7 is not set)
> Frame status can have the following values:
> 0: hdlc frame is ok
> 1: abort hdlc frame
> 2: hdlc frame overrun
> 3: bad hdlc frame FCS
> ****** ADDITIONAL INFORMATION ******
> The patch was developed in cooperation with Redfone LLC who made similar changes to their fonebridge product in order to support "hardhdlc" mode. The patch was tested in their lab.



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