P-2302R-P1 Series User’s Guide
Chapter 9 SIP
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9.1.10 MWI (Message Waiting Indication)
Enable Message Waiting Indication (MWI) enables your phone to give you a message–
waiting (beeping) dial tone when you have one or more voice messages. Your VoIP service
provider must have a messaging system that sends message-waiting-status SIP packets as
defined in RFC 3842.
9.1.11 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.
9.1.11.1 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 ZyXEL Device) so a server can decide the best method of delivery,
that is the least cost, fastest route and so on.
9.1.11.2 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.
1
9.1.11.3 DSCP and Per-Hop Behavior
DiffServ defines a new DS (Differentiated Services) field to replace the Type of Service
(TOS) field in the IP header. The DS field contains a 2-bit unused field and a 6-bit DSCP field
which can define up to 64 service levels. The following figure illustrates the DS field.
Figure 58
DiffServ: Differentiated Service Field
DSCP is backward compatible with the three precedence bits in the ToS octet so that non-
DiffServ compliant, ToS-enabled network device will not conflict with the DSCP mapping.
1.
The ZyXEL Device does not support DiffServ at the time of writing.
DSCP
(6-bit)
Unused
(2-bit)
Summary of Contents for P-2302R-P1 Series
Page 1: ...P 2302R P1 Series VoIP ATA Station Gateway User s Guide Version 3 60 Edition 1 5 2006...
Page 2: ......
Page 5: ...P 2302R P1 Series User s Guide Certifications 5...
Page 10: ...P 2302R P1 Series User s Guide 10 Customer Support...
Page 38: ...P 2302R P1 Series User s Guide 38 Chapter 1 Introducing the ZyXEL Device...
Page 46: ...P 2302R P1 Series User s Guide 46 Chapter 2 Introducing the Web Configurator...
Page 106: ...P 2302R P1 Series User s Guide 106 Chapter 7 LAN...
Page 125: ...P 2302R P1 Series User s Guide Chapter 9 SIP 125 Figure 60 VoIP SIP SIP Settings Advanced...
Page 130: ...P 2302R P1 Series User s Guide 130 Chapter 9 SIP...
Page 140: ...P 2302R P1 Series User s Guide 140 Chapter 10 Phone...
Page 146: ...P 2302R P1 Series User s Guide 146 Chapter 11 Phone Book...
Page 160: ...P 2302R P1 Series User s Guide 160 Chapter 14 Content Filter...
Page 174: ...P 2302R P1 Series User s Guide 174 Chapter 15 Bandwidth MGMT...
Page 184: ...P 2302R P1 Series User s Guide 184 Chapter 17 Static Route...
Page 208: ...P 2302R P1 Series User s Guide 208 Chapter 19 System...
Page 224: ...P 2302R P1 Series User s Guide 224 Chapter 20 Logs...
Page 234: ...P 2302R P1 Series User s Guide 234 Appendix A Product Specifications...
Page 256: ...P 2302R P1 Series User s Guide 256 Appendix C IP Subnetting...
Page 258: ...P 2302R P1 Series User s Guide 258 Appendix D SIP Passthrough...
Page 288: ...P 2302R P1 Series User s Guide 288 Appendix G Services...