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Chapter 16 VoIP
P-2601HN(L)-F1 Series User’s Guide
198
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.
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.
Figure 93
DiffServ: Differentiated Service Field
The DSCP value determines the forwarding behavior, the PHB (Per-Hop Behavior),
that each packet gets across the DiffServ network. Based on the marking rule,
different kinds of traffic can be marked for different priorities of forwarding.
Resources can then be allocated according to the DSCP values and the configured
policies.
VLAN Tagging
Virtual Local Area Network (VLAN) allows a physical network to be partitioned into
multiple logical networks. Only stations within the same group can communicate
with each other.
Your ZyXEL Device can add IEEE 802.1Q VLAN ID tags to voice frames that it
sends to the network. This allows the ZyXEL Device to communicate with a SIP
server that is a member of the same VLAN group. Some ISPs use the VLAN tag to
identify voice traffic and give it priority over other traffic.
16.9.4 Phone Services Overview
Supplementary services such as call hold, call waiting, and call transfer. are
generally available from your VoIP service provider. The ZyXEL Device supports
the following services:
• Call Hold
• Call Waiting
• Making a Second Call
• Call Transfer
• Three-Way Conference
DSCP
(6-bit)
Unused
(2-bit)
Содержание P-2601HN(L)-F1 Series
Страница 2: ......
Страница 8: ...Safety Warnings P 2601HN L F1 Series User s Guide 8 ...
Страница 10: ...Contents Overview P 2601HN L F1 Series User s Guide 10 ...
Страница 19: ...19 PART I User s Guide ...
Страница 20: ...20 ...
Страница 59: ...59 PART II Technical Reference ...
Страница 60: ...60 ...
Страница 110: ...Chapter 6 Wireless P 2601HN L F1 Series User s Guide 110 ...
Страница 130: ...Chapter 8 Routing P 2601HN L F1 Series User s Guide 130 ...
Страница 134: ...Chapter 9 DNS Route P 2601HN L F1 Series User s Guide 134 ...
Страница 178: ...Chapter 16 VoIP P 2601HN L F1 Series User s Guide 178 Figure 81 VoIP SIP SIP Service Provider ...
Страница 202: ...Chapter 16 VoIP P 2601HN L F1 Series User s Guide 202 ...
Страница 206: ...Chapter 17 Logs P 2601HN L F1 Series User s Guide 206 ...
Страница 212: ...Chapter 18 System Monitor P 2601HN L F1 Series User s Guide 212 ...
Страница 220: ...Chapter 21 SNMP P 2601HN L F1 Series User s Guide 220 ...
Страница 232: ...Chapter 26 Backup Restore P 2601HN L F1 Series User s Guide 232 ...
Страница 290: ...Appendix B Setting Up Your Computer s IP Address P 2601HN L F1 Series User s Guide 290 ...
Страница 298: ...Appendix C Pop up Windows JavaScript and Java Permissions P 2601HN L F1 Series User s Guide 298 ...
Страница 322: ...Appendix D Wireless LANs P 2601HN L F1 Series User s Guide 322 ...
Страница 332: ...Appendix F Open Software Announcements P 2601HN L F1 Series User s Guide 332 ...
Страница 344: ...Index P 2601HN L F1 Series User s Guide 344 ...