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Quality of Service QoS

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P-2002 Series User's Guide Table 14 VoIP Advanced (continued) LABEL DESCRIPTION Fax Option Use this field to set how the Prestige handles fax messages. You can select either the Fax Pass-through or the T.38 fax methods. Select Fax Pass-through to have the Prestige send fax messages over G.711. The peer devices must also use G.711. Select T.38 to have the Prestige send fax messages over the IP network as UDP or TCP/IP packets. It provides better transmission quality than fax pass-through but may have inter operability problems. The peer devices must also use T.38. Call Forward Table Select which call forwarding table you want the Prestige to use to block or redirect calls. You can use a different call forwarding table for each SIP account or use the same call forwarding table for both. Caller Ringing Select the Enable check box to activate a custom caller ringing tone for incoming calls. The caller ringing tone is the sound that incoming callers will hear when they call you. Use the Caller Ringing Tone drop-down list box to choose a tone. The caller ringing tone currently works with calls that are using the G.729 codec. On Hold Select the Enable check box to activate a custom on hold tone for callers on hold. The on hold tone is the sound callers will hear when you put them on hold. Use the On Hold Tone drop-down list box to choose a tone. The on hold tone currently works with calls that are using the G.729 codec. Back Click Back to return to the VoIP screen without saving configuration changes. Apply Click Apply to save your changes back to the Prestige. Reset Click Reset to begin configuring this screen afresh. 6.5 Quality of Service (QoS) Quality of Service (QoS) refers to both a network's ability to deliver data with minimum delay, and the networking methods used to provide bandwidth for real-time multimedia applications. 6.5.1 Type Of Service (ToS) Network traffic can be classified by setting the ToS (Type Of Service) values at the data source (for example, at the Prestige) so a server can decide the best method of delivery, that is the least cost, fastest route and so on. 6.5.2 DiffServ DiffServ is a class of service (CoS) model that marks packets so that they receive specific perhop treatment at DiffServ-compliant network devices along the route based on the application types and traffic flow. Packets are marked with DiffServ Code Points (DSCPs) 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. In addition, applications do not have to request a particular service or give advanced notice of where the traffic is going.1 1. The Prestige does not support DiffServ at the time of writing. 64 Chapter 6 VoIP Screens

Section	Page
P-2002 Series	1
Copyright	3
Federal Communications Commission (FCC) Interference Statement	4
Safety Warnings	6
ZyXEL Limited Warranty	7
Customer Support	8
Table of Contents	11
List of Figures	17
List of Tables	19
Preface	21
Introducing the Prestige	23
1.1 Prestige VoIP Analog Telephone Adaptor Overview	23
1.2 Prestige 2002L VoIP Analog Telephone Adaptor with Lifeline	23
1.3 Features	23
1.4 LEDs	25
1.5 Applications	26
1.5.1 Make Calls via Internet Telephony Service Provider	26
1.5.2 Make Calls via IP-PBX	27
1.5.3 Make Peer-to-peer Calls	27
Introducing the Web Configurator	29
2.1 Web Configurator Overview	29
2.2 Accessing the Prestige Web Configurator	29
2.3 Resetting the Prestige	31
2.3.1 Procedure To Use The Reset Button	31
2.4 Navigating the Prestige Web Configurator	31
2.5 Common Screen Command Buttons	33
System Screens	35
3.1 System Overview	35
3.2 General Setup	35
3.2.1 Domain Name	35
3.3 General Setup Configuration	35
3.4 Configuring Password	36
3.5 Pre-defined NTP Time Servers List	37
3.6 Configuring Time Setting	37
Ethernet Screens	41
4.1 ETHERNET Overview	41
4.1.1 IP Address and Subnet Mask	41
4.1.2 DNS Server Address Assignment	41
4.1.3 PPPoE Encapsulation	42
4.2 Configuring Ethernet	42
4.3 Configuring the Ethernet Management Port	44
Introduction to VoIP	45
5.1 Introduction to VoIP	45
5.2 Introduction to SIP	45
5.2.1 SIP Identities	45
5.2.1.1 SIP Number	45
5.2.1.2 SIP Service Domain	45
5.2.2 SIP Call Progression	46
5.2.3 SIP Servers	46
5.2.3.1 SIP User Agent	46
5.2.3.2 SIP Proxy Server	47
5.2.3.3 SIP Redirect Server	47
5.2.3.4 SIP Register Server	48
5.2.4 RTP	48
5.3 NAT	48
5.3.1 NAT Example	49
5.3.2 NAT Types	49
5.3.2.1 Full Cone NAT	50
5.3.2.2 Restricted Cone NAT	51
5.3.2.3 Port Restricted Cone NAT	52
5.3.2.4 Symmetric NAT	52
5.4 NAT and SIP	53
5.4.1 SIP ALG	53
5.4.2 Use NAT Address on SIP and RTP	53
5.4.3 STUN	54
5.4.4 Outbound Proxy	54
5.5 Pulse Code Modulation	54
5.6 Voice Coding	54
5.6.1 G.711	55
5.6.2 G.729	55
5.7 PSTN Call Setup Signaling	55
5.8 MWI (Message Waiting Indication)	55
VoIP Screens	57
6.1 VoIP Introduction	57
6.2 VoIP Configuration	57
6.3 Custom Tones (IVR)	59
6.3.0.1 Recording Custom Tones	60
6.3.0.2 Listening to Custom Tones	60
6.3.0.3 Deleting Custom Tones	60
6.4 Advanced VoIP Settings Configuration	60
6.5 Quality of Service (QoS)	64
6.5.1 Type Of Service (ToS)	64
6.5.2 DiffServ	64
6.5.2.1 DSCP and Per-Hop Behavior	65
6.5.3 VLAN	65
6.6 QoS Configuration	65
Phone	67
7.1 Phone Introduction	67
7.1.1 Voice Activity Detection/Silence Suppression	67
7.1.2 Comfort Noise Generation	67
7.1.3 Echo Cancellation	67
7.2 Phone Port Configuration	67
7.3 Supplementary Phone Services Overview	69
7.3.1 The Flash Key	69
7.3.2 Europe Type Supplementary Phone Services	69
7.3.2.1 European Call Hold	70
7.3.2.2 European Call Waiting	70
7.3.2.3 European Call Transfer	71
7.3.2.4 European Three-Way Conference	71
7.3.3 USA Type Supplementary Services	71
7.3.3.1 USA Call Hold	71
7.3.3.2 USA Call Waiting	72
7.3.3.3 USA Call Transfer	72
7.3.3.4 USA Three-Way Conference	72
7.4 Common Phone Configuration	72
Phone Book	75
8.1 Phone Book Introduction	75
8.1.1 Speed Dial	75
8.1.1.1 Peer-to-Peer Calls	75
8.1.2 Lifeline (Prestige 2002L)	75
8.2 Speed Dial Configuration	75
8.3 Call Forward	77
8.4 Lifeline Configuration (Prestige 2002L)	80
Logs	81
9.1 Viewing Logs	81
9.2 Log Message Descriptions	82
Maintenance	85
10.1 Maintenance Overview	85
10.2 Status Screen	85
10.3 F/W Upload Screen	86
10.4 Configuration Screen	88
10.4.1 Backup Configuration	89
10.4.2 Restore Configuration	89
10.4.3 Back to Factory Defaults	90
10.5 Restart Screen	91
Phone Usage	93
11.1 Dialing a Telephone Number	93
11.2 Using Speed Dial to Dial a Telephone Number	93
11.3 Internal Calls	93
11.4 Checking the Prestige’s IP Address	93
11.5 Auto Firmware Upgrade	94
Troubleshooting	95
12.1 Problems Starting Up the Prestige	95
12.2 Problems with the LAN or PC LED	95
12.3 Problems with the LAN Interface	96
12.4 Problems with Internet Access	96
12.5 Problems with the Web Configurator	97
12.6 Problems with the Password	97
12.7 Problems with Telephone or Telephone Port	98
12.8 Problems with Voice Service	98
12.9 Pop-up Windows, JavaScripts and Java Permissions	99
12.9.1 Internet Explorer Pop-up Blockers	99
12.9.1.1 Disable Pop-up Blockers	99
12.9.1.2 Enable Pop-up Blockers with Exceptions	100
12.9.2 JavaScripts	102
12.9.3 Java Permissions	104
12.9.3.1 JAVA (Sun)	105
Product Specifications	107
Setting up Your Computer’s IP Address	111
IP Subnetting	123
PPPoE	131
Internal SPTGEN	133
Index	161
Numerics	161
A	161
B	161
C	161
D	162
E	162
F	162
G	163
H	163
I	163
J	163
K	163
L	163
M	164
N	164
O	164
P	164
Q	165
R	165
S	166
T	167
U	167
V	167
W	167

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P-2002 Series User’s Guide

Chapter 6 VoIP Screens

6.5

Quality of Service (QoS)

Quality of Service (QoS) refers to both a network's ability to deliver data with minimum delay,

and the networking methods used to provide bandwidth for real-time multimedia applications.

6.5.1

Type Of Service (ToS)

Network traffic can be classified by setting the ToS (Type Of Service) values at the data source

(for example, at the Prestige) so a server can decide the best method of delivery, that is the

least cost, fastest route and so on.

6.5.2

DiffServ

DiffServ is a class of service (CoS) model that marks packets so that they receive specific per-

hop treatment at DiffServ-compliant network devices along the route based on the application

types and traffic flow. Packets are marked with DiffServ Code Points (DSCPs) 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. In addition, applications do not have to request

a particular service or give advanced notice of where the traffic is going.

Fax Option

Use this field to set how the Prestige handles fax messages. You can select either

the

Fax Pass-through

or the

T.38

fax methods.

Select

Fax Pass-through

to have the Prestige send fax messages over G.711.

The peer devices must also use G.711.

Select

T.38

to have the Prestige send fax messages over the IP network as UDP or

TCP/IP packets. It provides better transmission quality than fax pass-through but

may have inter operability problems. The peer devices must also use T.38.

Call Forward Table

Select which call forwarding table you want the Prestige to use to block or redirect

calls. You can use a different call forwarding table for each SIP account or use the

same call forwarding table for both.

Caller Ringing

Select the

Enable

check box to activate a custom caller ringing tone for incoming

calls. The caller ringing tone is the sound that incoming callers will hear when they

call you. Use the

Caller Ringing Tone

drop-down list box to choose a tone.

The caller ringing tone currently works with calls that are using the G.729 codec.

On Hold

Select the

Enable

check box to activate a custom on hold tone for callers on hold.

The on hold tone is the sound callers will hear when you put them on hold. Use the

On Hold Tone

drop-down list box to choose a tone.

The on hold tone currently works with calls that are using the G.729 codec.

Back

Click

Back

to return to the VoIP screen without saving configuration changes.

Apply

Click

Apply

to save your changes back to the Prestige.

Reset

Click

Reset

to begin configuring this screen afresh.

Table 14

VoIP Advanced (continued)

LABEL

DESCRIPTION

The Prestige does not support DiffServ at the time of writing.