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Page 81 / 122 Scroll up to view Page 76 - 80
MBR L13
–
User’s
Guide
81
To Improve Voice Reception with Echo Cancellation (administrator only)
Echo cancellation is the elimination of reflected signals (echoes) made noticeable by delay in the network. This
also improves the bandwidth of the line. When the delay of a voice call exceeds acceptable limits, L13 will protect
the far end from receiving any echo generated at the local end and sent back through the network.
To improve voice reception with echo cancellation, click the
Advanced
link under the
Voice
item menu. In the
Echo Cancellation
section, configure the following options.
Figure 108:
Advanced
–
Echo Cancellation
Parameter
Description
Enabled
Select or deselect this check box to enable or
disable this feature.
Tail Length
Defines the length of the elapsed time frame used
for calculating the extrapolation of the echo
cancellation. A long tail improves the echo
cancellation, but increases the load on the Digital
Signal Processor (DSP).
Non-Linear Process (NLP)
Determines the type of calculation that is used for
removing the echo effect. You can set this feature
to Normal, High or Off. Using high NLP improves the
echo cancellation, but increases the load on the
DSP.
Delay Compensation
A time delay compensating the echo cancellation.
To configure the DSP settings (administrator only):
The DSP
table enables you to adjust the analog port’s FXS gain / volume parameters.
Figure 109: Analog Ports FXS/FXO Gain Parameters configuration table
Parameter
Description
HSS Interface Output Gain /
These parameters adjust the output (Tx) volume.
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MBR L13
–
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Guide
82
Encoder Volume
HSS Interface Input Gain /
Decoder Volume
These parameters adjust the input (Rx) volume.
Tone generator Volume
This parameter adjusts the volumes of all progressive telephony
tones that are used in PBX calls:
Busy tone, dial tone, call
progress tone, etc.
To activate the call-waiting audio notification for analog extension (administrator only):
Under
Call Waiting
, select
Enable ACK Spoofing for Caller ID Call Waiting
.
Figure 110 Call Waiting table
Note:
Time From the End of CAS to the Start of Data
is a technical parameter that should only be set by authorized
technical-support staff.
To Change the FXS Ports Settings (administrator only)
The
FXS Ports
section contains advanced electronic settings for the FXS (analog) port, which should only be modified
by an experienced administrator or technician.
Figure 111: Advanced
–
FXS Ports
The following settings can be modified:
Parameter
Description
Select country
Select the pre-defined FXS /POTS line configuration from
the list of countries which responds to your region.
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MBR L13
–
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Guide
83
Ringing Voltage
The ringing voltage, in volts.
Ringing Frequency
The ringing frequency, in hertz.
Ringing Waveform
The ringing waveform
–
sinusoid or trapezoid.
On-Hook Voltage
The voltage of an idle handset, in volts.
Off-Hook Current
The current of an active handset, in mili-amperes.
Two-Wire Impedance
Select the voice band impedance, in ohms, to be synthesized by
the SLIC.
Transmit Gain
The transmit gain, in decibels.
Receive Gain
The receive gain, in decibels.
Interdigit Timeout
The inter-digit dialing time interval of the FXS extension. The
system starts to transmit the digits it receives when the timeout
period has passed.
Dial Tone Timeout
The headset’s Hang Off dial tone providing maximum time.
Connection will be aborted when the time expired.
Congestion Tone Timeout
Specifies the maximum Congestion tone playback time interval.
Specified time expiring indicates to system rejecting exiting
conversation.
Hook Flash
The PBX switch Hook flash time interval.
End of Dialed Number Key
Dialing option which indicates to PBX that the destination
number’s dialing is finished and can be transmitted
to the
destination.
3.7.4
Personal Domain Name (DDNS)
Typically, when you connect to the Internet, your service provider assigns an unused IP address from a pool of IP
addresses. This type of address, called a dynamic IP address, is only assigned to you for the duration of the
connection. Each time you connect to the Internet, a different IP address is assigned to you. Dynamically assigning
addresses extends the usable pool of available IP addresses. However, since in this configuration the computers have
no fixed IP addresses, the access to those computers from the Internet with a specific IP address is not possible.
A Dynamic DNS (DDNS) service enables you to alias a dynamic IP address to a static hostname.
When you use a DDNS
service, each time the IP address provided by your ISP changes, the DNS database is updated to reflect the change.
Regardless of the IP address assigned to your computer, it will have a constant domain name. This way, even though
your IP address may change often, your domain name will remain constant and your computer will be accessible.
Note:
In order to use the L13 DDNS feature, you must first obtain a DDNS account. You can open a free account at
. When applying for an account, you will need to specify a user name
and password. Then create the free DNS host and activate it. Please have them readily available when you activate the
L13 DDNS support.
To activate L13
DDNS support:
1
.
Navigate to
Home
Personal Domain Name
. The Personal Domain Name overview
screen appears.
Page 84 / 122
MBR L13
–
User’s
Guide
84
Figure 112: Personal Domain Name Overview Screen
2.
Click the
New Dynamic DNS Entry
link to add a new DDNS entry. The
Personal Domain Name
settings screen
appears:
Figure 113: Personal Domain Name Settings Screen
3.
Specify the DDNS parameters as follows:
Parameter
More Info
Host Name
Enter your full DDNS domain name.
Connection
Select the connection to which you would like to couple the DDNS
service. In L13 there is only one option
–
“WAN Cellular Modem”.
Provider
Select your DDNS service provider. The screen will refresh,
displaying the parameters required by each provider.
Click Here to Initiate and
Manage your Subscription
Click this link to open the selected provider's account creation Web
page. For example, when
dyndns.org
is selected, the following page
will open:
.
User Name
Enter your DDNS user name.
Password
Enter your DDNS password.
User Define
Currently not in use
Wildcard
Select this checkbox to enable the use of special links such as
http://www.<your host>.dyndns.com
Mail Exchanger
To redirect all e-mails arriving at your DDNS address to your mail
server, enter your mail exchange server address.
Backup MX
Select this check-box to designate the mail exchange server to be a
backup server.
Offline
If you wish to temporarily take your site offline (to prevent traffic
from reaching your DDNS domain name), check this box to enable
redirection of DNS requests to an alternative URL, predefined in
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MBR L13
–
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Guide
85
your DDNS account. The availability of this feature depends on your
account's level and type of service.
4.
Click
Close
. The Personal Domain Name screen appears, and the DDNS entry you defined is listed in the table.
Figure 114: Dynamic DNS Activated
L13 can handle more than one DDNS hostname. You can define more than one hostname for a single WAN connection
by simply repeating the procedure above for the same connection.
When you have finished activating the DDNS service, you can verify that it was activated correctly.
To verify that DDNS is activated for a hostname:
Browse to the hostname (e.g., http://itsp.dyndns.org). If the hostname is resolved correctly, the L13 WBM
login page opens.
3.7.5
DNS Server
Domain Name System (DNS) provides a service that translates domain names into IP addresses and vice versa. The
gateway's DNS server is an auto-learning DNS, which means that when a new computer is connected to the network
the DNS server learns its name and automatically adds it to the DNS table. Other network users may immediately
communicate with this computer using either its name or its IP address. In addition your gateway's DNS:
Shares a common database of domain names and IP addresses with the DHCP server.
Supports multiple subnets within the LAN simultaneously.
Automatically appends a domain name to unqualified names.
Allows new domain names to be added to the database using L13
WBM.
Permits a computer to have multiple host names.
Permits a host name to have multiple IPs (which is needed when a host has multiple network cards).
The DNS server does not require configuration. However, you may wish to view the list of computers known by the
DNS, edit the host name or IP address of a computer on the list, or manually add a new computer to the list.
To view the list of computers stored in the DNS table:
Navigate to
Services
DNS Server
.
Figure 115:
DNS Table

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