ZyXEL Communications 128MH user manual The Filter Structure of the Prestige

Prestige 128MH PSTN Router/Hub

Outgoing Packet

Data

Filters

Match

Drop

packet

No

match

Call Filters

No

No

Active Data

Built-in

User-defined

default

match

Call Filters

match

Initiate call

if line not up

Call Filters

(if applicable)

Send packet

and reset

Match

Match

Idle Timer

Drop packet

Drop packet

if line not up

if line not up

Or

Or

Send packet

Send packet

but do not reset

but do not reset

Idle Timer

Idle Timer

Figure 9-1. Outgoing Packet Filtering Process

For incoming packets, your Prestige applies data filters only. Packets are processed depending upon whether a match is made. Your Prestige allows you to customize the filter sets that you wish to use. The following sections describe how to configure filter sets.

The Filter Structure of the Prestige

You can configure up to twelve filter sets with six rules in each set, allowing you to customize up to 72 filter rules (12 x 6).

When implementing these filter sets, you can link up to four of the filter sets together to screen the data packet. Therefore, with each filter set having up to six rules, you can have a maximum of 24 rules active for a single filtering application.

9-2Chapter 9 Filter Configuration