Device Server H323/SIP stack information. This
value should include the full name and version
identification and/or manufacturer information of
the H323/SIP Stack used in the device server implementation.
It is mandatory that this contains only printable ASCII
Device Server Log Level. A minimum logging level is
always set for the device servers, which logs errors
and warnings. If still more verbosity is required, that
can be done by setting this parameter to a required level.