+===================================================================+
|      HD Audio (Hight Definition Audio)                            |
+===================================================================+

+-------------------------------------------------------------------+
|  Supported HD Audio vocoders                                      |
+-------------------------------------------------------------------+

Diva provides support for following HD Audio vocoders:

g722, ssiren7 siren14 and slin16

+-------------------------------------------------------------------+
|  Supported Diva Hardware                                          |
+-------------------------------------------------------------------+

HD Audio support is provided by:
Diva 4PRI PCI
Diva 2PRI PCI
Diva 4PRI PCIe HS
Diva 2PRI PCIe HS
Diva 1PRI PCIe HS
Diva 8PRI PCIe FS 4LANE
Diva 4PRI PCIe FS 4LANE

+-------------------------------------------------------------------+
|  HD Audio over ISDN support                                       |
+-------------------------------------------------------------------+

To activate support for HD Audio please allow all or one of HD Audio
codecs for one or more CAPI controllers. You can do it by Diva WEB
configuration or by edit of 'capi.conf'.

Diva hardware will use BC/HLC/LLC method to agree on HD Audio
format with opposite side. In addition Diva hardware will
perform analysis of B-channel data to determine if HD Audio
format is signaled in band.

Dependent on this procedire Diva will use HD Audio format
or change to G.711 if HD Audio is not supported by opposite side.

Diva hardware will always convert media to one requested by chan_capi format.
Following conversions are performed automatically:

G.711    <-> HD Audio in case chan_capi uses HD Audio but opposite side not
HD Audio <-> G.711/GSM/... in case opposite side uses HD Audio but
             chan_capi uses other codec

Examples of HD Audio operation:

G.722 <-> SLINEAR16
G.722 <-> siren14
G.722 <-> siren7
G.722 <-> G.722

Using  automatic convertion this is possible always use HD Audio on internel (IP) network and do not case
about used on the line (ISDN) format.

+-------------------------------------------------------------------+
|  HD Audio support for IP conference endpoints                     |
+-------------------------------------------------------------------+

To activate HD Audio support for IP conferencing please add one or
mode HD Audio codecs to codeclist of capi command 'resource'.
Please read README.media for details on 'resource'


+-------------------------------------------------------------------+
|  Conferencing between HD and NB Audio endpoints                   |
+-------------------------------------------------------------------+

In case of conference with HD and NB (Narrow Band) Audio endpoints
the quelity of HD endpoints is preserved