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Page 226 / 424 Scroll up to view Page 221 - 225
Chapter 15 Certificates
P-2612HNU-Fx User’s Guide
226
15.3
Trusted CA
Use this screen to view a summary list of certificates of the certification authorities
that you have set the ZyXEL Device to accept as trusted. The ZyXEL Device
accepts any valid certificate signed by a certification authority on this list as being
trustworthy; thus you do not need to import any certificate that is signed by one
of these certification authorities.
Click
Security > Certificates >
Trusted CA
to open the
Trusted CA
screen.
Figure 89
Security > Certificates > Trusted CA
The following table describes the labels in this screen.
Key Type
This field applies to the
SSH/SCP/SFTP
certificate.
This shows the
file format of the current certificate.
Replace
Click this to replace the certificate(s) and save your changes back to the
ZyXEL Device.
Reset
Click this to clear your settings.
Table 53
Security > Certificates > Local Certificates (continued)
LABEL
DESCRIPTION
Table 54
Security > Certificates > Trusted CA
LABEL
DESCRIPTION
Import
Certificate
Click this button to open a screen where you can save the certificate of
a certification authority that you trust to the ZyXEL Device.
Name
This field displays the name used to identify this certificate.
Subject
This field displays information that identifies the owner of the
certificate, such as Common Name (CN), OU (Organizational Unit or
department), Organization (O), State (ST) and Country (C). It is
recommended that each certificate have unique subject information.
Page 227 / 424
Chapter 15 Certificates
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227
15.4
Trusted CA Import
Click
Import
Certificate
in
the
Trusted CA
screen to open the
Import
Certificate
screen. You can save a trusted certification authority’s certificate to
the ZyXEL Device.
Note: You must remove any spaces from the certificate’s filename before you can
import the certificate.
Figure 90
Trusted CA > Import
The following table describes the labels in this screen.
Type
This field displays general information about the certificate.
ca
means
that a Certification Authority signed the certificate.
Action
Click the
View
icon to open a screen with an in-depth list of information
about the certificate (or certification request).
Click the
Delete
icon to delete the certificate (or certification request).
You cannot delete a certificate that one or more features is configured
to use.
Table 54
Security > Certificates > Trusted CA (continued)
LABEL
DESCRIPTION
Table 55
Security > Certificates > Trusted CA > Import
LABEL
DESCRIPTION
Certificate
File Path
Type in the location of the file you want to upload in this field or click
Browse
to find it.
Browse
Click
Browse
to find the certificate file you want to upload.
Apply
Click
Apply
to save the certificate on the ZyXEL Device.
Back
Click
Back
to return to the previous screen.
Page 228 / 424
Chapter 15 Certificates
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228
15.5
View Certificate
Use this screen to view in-depth information about the certification authority’s
certificate, change the certificate’s name and set whether or not you want the
ZyXEL Device to check a certification authority’s list of revoked certificates before
trusting a certificate issued by the certification authority.
Click
Security
>
Certificates
>
Trusted CA
to open the
Trusted CA
screen.
Click the
View
icon to open the
View Certificate
screen.
Figure 91
Trusted CA: View
The following table describes the labels in this screen.
Table 56
Trusted CA: View
LABEL
DESCRIPTION
Certificate Name
This field displays the identifying name of this certificate. If you want
to change the name, type up to 31 characters to identify this key
certificate. You may use any character (not including spaces).
Certificate Detail
This read-only text box displays the certificate or certification request
in Privacy Enhanced Mail (PEM) format. PEM uses 64 ASCII characters
to convert the binary certificate into a printable form.
You can copy and paste the certificate into an e-mail to send to
friends or colleagues or you can copy and paste the certificate into a
text editor and save the file on a management computer for later
distribution (via floppy disk for example).
Back
Click this to return to the previous screen.
Page 229 / 424
P-2612HNU-Fx User’s Guide
229
C
HAPTER
16
VoIP
16.1
Overview
Use this chapter to:
•
Connect an analog phone to the ZyXEL Device.
•
Make phone calls over the Internet, as well as the regular phone network.
•
Configure settings such as speed dial.
•
Configure network settings to optimize the voice quality of your phone calls.
16.1.1
What You Can Do in this Chapter
These screens allow you to configure your ZyXEL Device to make phone calls over
the Internet and your regular phone line, and to set up the phones you connect to
the ZyXEL Device.
•
Use the
SIP Service Provider
screen to configure the SIP server information,
QoS for VoIP calls, the numbers for certain phone functions (
Section 16.3 on
page 235
).
•
Use the
SIP Account
screen to set up information about your SIP account,
control which SIP accounts the phones connected to the ZyXEL Device use and
configure audio settings such as volume levels for the phones connected to the
ZyXEL Device
(
Section 16.3 on page 235
).
•
Use the
Common
screen to configure RFC3262 support on the ZyXEL Device
(
Section 16.5 on page 242
).
•
Use the
Phone Device
screen to control which SIP accounts the phones
connected to the ZyXEL Device use (
Section 16.6 on page 243
).
•
Use the
Region
screen to change settings that depend on the country you are
in (
Section 16.7 on page 245
).
•
Use the
Call Rule
screen to set up shortcuts for dialing frequently-used (VoIP)
phone numbers (
Section 16.8 on page 245
).
You don’t necessarily need to use all these screens to set up your account. In fact,
if your service provider did not supply information on a particular field in a screen,
it is usually best to leave it at its default setting.
Page 230 / 424
Chapter 16 VoIP
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230
16.1.2
What You Need to Know
The following terms and concepts may help as you read this chapter.
VoIP
VoIP stands for Voice over IP. IP is the Internet Protocol, which is the message-
carrying standard the Internet runs on. So, Voice over IP is the sending of voice
signals (speech) over the Internet (or another network that uses the Internet
Protocol).
SIP
SIP stands for Session Initiation Protocol. SIP is a signalling standard that lets one
network device (like a computer or the ZyXEL Device) send messages to another.
In VoIP, these messages are about phone calls over the network. For example,
when you dial a number on your ZyXEL Device, it sends a SIP message over the
network asking the other device (the number you dialed) to take part in the call.
SIP Accounts
A SIP account is a type of VoIP account. It is an arrangement with a service
provider that lets you make phone calls over the Internet. When you set the
ZyXEL Device to use your SIP account to make calls, the ZyXEL Device is able to
send all the information about the phone call to your service provider on the
Internet.
Strictly speaking, you don’t need a SIP account. It is possible for one SIP device
(like the ZyXEL Device) to call another without involving a SIP service provider.
However, the networking difficulties involved in doing this make it tremendously
impractical under normal circumstances. Your SIP account provider removes these
difficulties by taking care of the call routing and setup - figuring out how to get
your call to the right place in a way that you and the other person can talk to one
another.
Voice Activity Detection/Silence Suppression
Voice Activity Detection (VAD) detects whether or not speech is present. This lets
the ZyXEL Device reduce the bandwidth that a call uses by not transmitting “silent
packets” when you are not speaking.
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.

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