ZyXEL Communications V300 Podręcznik Użytkownika Pobierz pdf (Strona 24)

V-300 Support Notes

Step 6. Click on Apply button when you are finish to add the entry to the Speed Dial Key.

You could just press the numerical key on V300 and hold for longer than 1 sec then dial the corresponding

number out.

Each field's detail description of the page is listed below.

Label Description

Speed Dial

This section of the screen displays the currently saved speed dial entries.

You can configure up to 6 entries and use them to make calls. Enter the

speed dial number that you will can (use the number or text). You can use up

to 20 ASCII characters.

Apply

Click Apply to save your changes back to the IP Phone.

Reset

Click Reset to begin configuring this screen afresh.

Voice - QoS setup

DSCP and Per-Hop Behavior

Diffserv is a class of service (CoS) model that marks packets so that they receive specific per-hop treatment at

DiffServ-compliant network device along the route based on the application types and traffic flow. Packets are

marked with DSCP indicating the level of service desired. This allows the intermediary DiffServ-compliant

network devices to handle the packets differently depending on the code points without the need to negotiate paths

or remember state information for every flow.

Diffserv defines a new DS(Differentiated Services) field to replace the TOS(Type of Service) field in IP header.

The DS field contains a 2-bit unused field and a 6-bit DSCP filed which can define up to 64 service levels. The

following figure illustrates the DS field.

DiffServ: Differentiated Service Field

Diffserv Code Point

6-bit

Unused

2-bit

The DSCP value determines the forwarding behavior, the PHB(Per-Hop Behavior), that each packet gets across the

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ZyXEL Communications V300 Podręcznik Użytkownika Strona 24