ZyXEL Communications P-2302R Series User Manual

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P-2302R Series User’s Guide
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Chapter 8 VoIP Screens
8.5  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. 
Enable
Check this box to have your phone give you a message–waiting (beeping) dial 
tone when you have a voice message(s). Your voice service provider must have a 
messaging system that supports this feature.
Expiration Time
Use this field to set how long the SIP server should continue providing the 
message waiting service after receiving a SIP SUBSCRIBE message from the 
Prestige.
The SIP server stops providing the message waiting service if it has not received 
another SIP SUBSCRIBE message from the Prestige before this time period 
expires. 
Fax Option
This field controls how the Prestige handles fax messages.
Fax Pass-through
Select this radio button to have the Prestige send fax messages over G.711. The 
peer devices must also use G.711. 
T.38
Select this radio button 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
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
Enable
Check this box if you want to specify what tone people hear when they call you. 
The Prestige provides a default tone, but you can add additional tones using IVR. 
Caller Ringing 
Tone
Select the tone you want people to hear when they call you. You should setup 
Tones 1 - 8 using IVR first. See 
 for more information.
On Hold
Enable
Check this box if you want to specify what tone people hear when you put them on 
hold. The Prestige provides a default tone, but you can add additional tones using 
IVR. See 
On Hold Tone
Select the tone you want people to hear when you put them on hold. You should 
setup Tones 1 - 8 using IVR first. See 
 for more 
information.
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 23   VoIP Advanced (continued)
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