ZyXEL P-2612HNU-F3 User Guide - Page 250

PSTN Call Setup Signaling, MWI Message Waiting Indication, Type of Service ToS, DiffServ

Page 250 highlights

Chapter 16 VoIP PSTN Call Setup Signaling Dual-Tone MultiFrequency (DTMF) signaling uses pairs of frequencies (one lower frequency and one higher frequency) to set up calls. It is also known as Touch Tone®. Each of the keys on a DTMF telephone corresponds to a different pair of frequencies. Pulse dialing sends a series of clicks to the local phone office in order to dial numbers.3 MWI (Message Waiting Indication) Enable Message Waiting Indication (MWI) enables your phone to give you a message-waiting (beeping) dial tone when you have a voice message(s). Your VoIP service provider must have a messaging system that sends message waiting status SIP packets as defined in RFC 3842. 16.10.3 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 realtime multimedia applications. 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. 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 (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. In addition, applications do not have to request a particular service or give advanced notice of where the traffic is going.4 250 3. The ZyXEL Device does not support pulse dialing at the time of writing. 4. The ZyXEL Device does not support DiffServ at the time of writing. P-2612HNU(L)-FxF User's Guide

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Chapter 16 VoIP
P-2612HNU(L)-FxF User’s Guide
250
PSTN Call Setup Signaling
Dual-Tone MultiFrequency (DTMF) signaling uses pairs of frequencies (one lower
frequency and one higher frequency) to set up calls. It is also known as Touch
Tone®. Each of the keys on a DTMF telephone corresponds to a different pair of
frequencies.
Pulse dialing sends a series of clicks to the local phone office in order to dial
numbers.
3
MWI (Message Waiting Indication)
Enable Message Waiting Indication (MWI) enables your phone to give you a
message–waiting (beeping) dial tone when you have a voice message(s). Your
VoIP service provider must have a messaging system that sends message waiting
status SIP packets as defined in RFC 3842.
16.10.3
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.
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.
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 (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. In addition, applications do not have to request a
particular service or give advanced notice of where the traffic is going.
4
3.
The ZyXEL Device does not support pulse dialing at the time of writing.
4.
The ZyXEL Device does not support DiffServ at the time of writing.