Nortel Media Gateway 3200 User Manual page 77

H.248 User's Manual
The first field is a text representation of the internal coder name. The second field is free
text, and contains the name that is to be used in the SDP. The two payload fields define
the default payload for this coder. The PTIME field defines the default to be used for this
coder. The maximal value is the basic packet size (i.e., 20) multiplied by 6.
6.4.2.4.1 New Coders Introduced with the Table
EVRC0 – This is actually not a new coder, it was called until now EVRC in our SDP.
The correct name (according to RFC 3558) is EVRC0, as this is what our board
supports.
BV16 and iLBC – Both are supported for BCT only.
6.4.2.4.2 Coders Support Level
The application defines the following support levels for coders:
None - A coder with support level "None" is not supported. An error is generated if an
attempt is made to use the coder.
Full - A coder with support level "Full" is valid for all type of calls.
BCT - A coder with support level "BCT" (a new feature) is valid ONLY for BCT calls.
The coders iLBC and BV16 belong to this feature. Other coders, that appears in the
file, but are not supported in the current DSP template, also receive this support level.
The support level is defined internally by the board.
6.4.2.4.3 Converting a Modified CoderTable ini File to a dat File Using DConvert Utility
After modifying the original CoderTable (Tbl) ini file (originally supplied with the MG 3200's
software package), you can use the DConvert Utility (DConvert240.exe) to convert the
modified file into a dat binary file. (The ini file cannot be sent.) For more information, refer
to the Appendix,' Utilities' on page 353. You can only send the dat file to the MG 3200.
After creating the dat file, send it to the MG 3200 using one of the following:
The Embedded Web Server GUI's Auxiliary Files (Refer to 'Auxiliary Files Download'
on page 199.)
or
The BootP/TFTP Server - used to send the ini file (which simultaneously downloads
the CoderTbl dat file, to the MG 3200, The ini file parameter CoderTblFilename must
be enabled and both the ini file and CoderTbl dat file must be located in the same
directory.) (Refer to the Appendix, 'BootP/TFTP Server' on page 223).
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