Nortel Media Gateway 3200 User Manual page 65

H.248 User's Manual
6.4.1.3.2 Dynamic Tables versus Static Tables
Static Table
The Static table type does not support adding new lines or removing (deleting) an existing
line. All lines in a Static table are pre-configured with default values. Users may modify
values in existing lines. After reset, all lines in a Static table are available.
Dynamic Table
The Dynamic table type supports adding and removing lines. It is always initialized as an
empty table, with no lines. Users should add lines to the Dynamic table via the ini file or at
run-time.
Note:
6.4.1.3.3 Tables in the Uploaded ini File
Tables are grouped according to the applications they configure. For example, several
tables are required to configure SS7, and other tables are required to configure ATM.
When uploading the ini file, the policy is to include only tables that belong to applications,
which have been configured (Dynamic tables of other applications are empty, but static
tables are not). The trigger for uploading tables is further documented in the applications'
specific sections.
6.4.1.3.4 Secret Tables
A table is defined as a secret table if it contains at least one secret data field or if it
depends on such a table. A secret data field is a field that must not be revealed to the user.
An example of a secret field can be found in an IPSEC application. The IPsec tables are
defined as secret tables because the IKE table contains a pre-shared key field, which must
not be revealed to the user. The SPD table depends on the IKE table. Therefore, the SPD
table is defined as a secret table.
There are two major differences between tables and secret tables:
The secret field itself can not be viewed via SNMP, Web Server or any other tool.
ini File behavior: These tables are never uploaded in the ini File (e.g., 'Get INI-File
from WEB'). Instead, there is a commented title that states that the secret table is
present at the board, and is not to be revealed.
Secret tables are always kept in the board's non-volatile memory, and may be over-
written by new tables that should be provided in a new ini File. If a secret table
appears in an ini File, it replaces the current table regardless of its content. The way to
delete a secret table from a board is, for example, to provide an empty table of that
type (with no data lines) as part of a new ini File. The empty table replaces the
previous table in the board.
Version SN09
Certain Dynamic tables may initialize one or more lines at start-up time. If
so, it is documented in the table's specific section.
6. MG 3200 Initialization & Configuration Files
65 October 2006