ZyXEL Communications P-2802H-I Series, User Manual

Page: 142 / 418

Chapter 10 Voice
P-2802H(W)(L)-I Series User’s Guide
142
10.7.2 Comfort Noise Generation
When using VAD, the ZyXEL Device generates comfort noise when the other party is not
speaking. The comfort noise lets you know that the line is still connected as total silence could
easily be mistaken for a lost connection.
10.7.3 Echo Cancellation
G.168 is an ITU-T standard for eliminating the echo caused by the sound of your voice
reverberating in the telephone receiver while you talk.
10.8 Analog Phone Screen
Use this screen to control which SIP accounts and PSTN line each phone uses. To access this
screen, click
VoIP > Phone > Analog Phone .
Figure 78 Phone > Analog Phone
Each field is described in the following table.
Table 51 Phone > Analog Phone
LABEL DESCRIPTION
Phone Port
Settings
Select the phone port you want to see in this screen. If you change this field, the
screen automatically refreshes.
Outgoing Call Use If you select both SIP accounts, the ZyXEL Device tries to use SIP2 first. If you do
not select a SIP account, you cannot make VoIP calls on the phone connected to
this phone port.
SIP1 Select this if you want this phone port to use the SIP1 account when it makes
calls.
SIP2 Select this if you want this phone port to use the SIP2 account when it makes
calls.
Incoming Call
apply to
If you select more than one source for incoming calls, there is no way to
distinguish between them when you receive phone calls. If you do not select a
source for incoming calls, you cannot receive any calls on this phone port.
SIP1 Select this if you want to receive phone calls for the SIP1 account on this phone
port.
SIP2 Select this if you want to receive phone calls for the SIP2 account on this phone
port.