4. If the desire is to block certain VANC types to pass-thru, allowing all other types
to pass-thru on the ANC component, select Block for the Generic ANC Filter
Control and follow step 5 to select the types that will be blocked.
5. On selecting either Block or Allow, the web interface will display a table of filters.
This table may be initially empty and the user is to populate it.
a To add a VANC type to the filter, press the Add Filter button, and insert the
details of the DID, SDID and line number of that type.
b To remove a VANC type from the filter, click on the line to select it, and
press the Remove selected button.
c To clear the table of all entries, press the Remove all button.
The DID and SDID entries in the filter table are always displayed in hexadecimal,
indicated by the number being prefixed with 0x unless entering a value, in which
case the value is in decimal. Entering a DID or SDID number can be done in
decimal or hexadecimal.
To enter a decimal number, just enter it using standard numbers. For example, enter
123 and press ENTER on the keyboard. This will immediately be displayed in the
hexadecimal equivalent (in this example, this is 0x7B).
To enter a hexadecimal number, type 0xAB where AB is the hexadecimal number
required.
If a range of VANC types with similar identifiers are required to be filtered, or present
on a range of lines, a wild-card may be used. The only wild-card supported is the
value 0 (zero), chosen because zero is not a valid DID, SDID or line number.
Use of the wild-cards gives rise to the characteristics in Table 3.13.
Table 3.13 VANC Filtering Wild-cards
DID SDID Line Filter Applies To
0 0 Non-zero Any DID and SDID on a specified line.
0 Non-zero Non-zero Any DID with a specified SDID on a specified line.
Non-zero 0 Non-zero A specific DID with any SDID, on a specified line.
Non-zero Non-zero Non-zero An exact match on DID, SDID and line.
0 0 0
The filter will either block or allow all types, as set by the filter control
setting.
0 Non-zero 0 A specified SDID for all DIDs on any line.
Non-zero 0 0 A specific DID with any SDID, on any line.
Non-zero Non-zero 0 A specific DID and SDID on any line.
By way of example, the entry in the table shown in Figure 3.74 VANC Filter Entry
Using Wild-cards, will filter all VANC types with DID 0x61 regardless of the SDID
number and regardless of which line contains that VANC type.
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