Comfort Noise Generation; Echo Cancellation; Analog Phone Screen; Figure 78 Phone > Analog Phone - ZyXEL Communications P-2802H(W)(L)-I Series User Manual

Chapter 10 Voice

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
Phone Port
Settings
Outgoing Call Use If you select both SIP accounts, the ZyXEL Device tries to use SIP2 first. If you do
SIP1
SIP2
Incoming Call
apply to
SIP1
SIP2
142
DESCRIPTION
Select the phone port you want to see in this screen. If you change this field, the
screen automatically refreshes.
not select a SIP account, you cannot make VoIP calls on the phone connected to
this phone port.
Select this if you want this phone port to use the SIP1 account when it makes
calls.
Select this if you want this phone port to use the SIP2 account when it makes
calls.
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.
Select this if you want to receive phone calls for the SIP1 account on this phone
port.
Select this if you want to receive phone calls for the SIP2 account on this phone
port.
P-2802H(W)(L)-I Series User's Guide