ZyXEL Communications VMG4325-B10A, Руководство пользователя

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Chapter 6 Broadband
VMG4380-B10A / VMG4325-B10A User’s Guide
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6.4 The Advanced Screen
Use the Advanced screen to enable or disable PTM over ADSL, Annex M, and DSL PhyR functions.
The Device supports the PhyR retransmission scheme. PhyR is a retransmission scheme designed to
provide protection against noise on the DSL line. It improves voice, video and data transmission
resilience by utilizing a retransmission buffer.
6.4.1 DSL Bonding
If the DSLAM of your ISP supports DSL bonding, you can connect the two DSL ports on the Device
to two separate telephone jacks and enable the bonding feature in the Advanced screen.
DSL signals have distance limitations. VDSL2 (profile 17a) supports greater speed but offer shorter
distances (within 3000 ft). The farther away the subscribers are from the DSLAM, the slower the
speed. VDSL (profile 12a) provides longer distance range (over 3000 ft) but at lower speeds. DSL
bonding allows subscribers to use data streams spread over two DSL lines in order to (almost)
double the speed at longer distances. You may choose to use DSL bonding if the DSLAM supports it
and there are two DSL lines to the DSLAM.
The total available bandwidth for the subscriber then becomes the sum of the bandwidth available
for each of the subscriber’s line connections. The data rate depends on the DSL type, its standard/
profile, and the standard/profile that the DSLAM supports. The table below shows the transmission
data rate for single DSL line and DSL bonding.
Actions when
over budget Specify the actions the Device takes when the time or data limit is exceeded.
Current 3G
connection Select Keep to maintain an existing 3G connection or Drop to disconnect it.
Enable Email
Notification Select this to enable the e-mail notification function. The Device will e-mail you a
notification when there over budget occurs.
Mail Server Select a mail server for the e-mail address specified below.
If you do not select a mail server, e-mail notifications cannot be sent via e-mail. You must
have configured a mail server already in the Maintenance > Email Notification screen.
Over Budget
Email Title Type a title that you want to be in the subject line of the e-mail notifications that the Device
sends.
Send
Notification to
Email Notifications are sent to the e-mail address specified in this field. If this field is left blank,
notifications cannot be sent via e-mail.
Interval Enter the interval of how many minutes you want the Device to e-mail you.
Enable Log Select this to activate the logging function at the interval you set in this field.
Basic Click this to hide the advanced settings of 3G backup.
Apply Click Apply to save your changes back to the Device.
Cancel Click Cancel to return to the previous configuration.
Table 11
Network Setting > Broadband > 3G Backup (continued)
LABEL DESCRIPTION