Each entry is a DNIS name and the location of the
associated VXML page. New DNIS entries can be created or
the existing entries can be modified or deleted only if
the corresponding map name (defined in
cvDnisMappingTable) does not have any file name provided
in the cvDnisMappingUrl object.
If a file name is provided in cvDnisMappingUrl
corresponding to this entry's map name, then this row
will have read permission only.