ZyXEL VMG4381 User Guide - Page 93

Chapter 6 Broadband Table 11 Network Setting > Broadband > 3G Backup (continued) LABEL Actions when over budget Current 3G connection Enable Email Notification Mail Server DESCRIPTION Specify the actions the Device takes when the time or data limit is exceeded. Select Keep to maintain an existing 3G connection or Drop to disconnect it. Select this to enable the e-mail notification function. The Device will e-mail you a notification when there over budget occurs. Select a mail server for the e-mail address specified below. Over Budget Email Title Send Notification to Email Interval Enable Log Basic Apply Cancel 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. Type a title that you want to be in the subject line of the e-mail notifications that the Device sends. 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. Enter the interval of how many minutes you want the Device to e-mail you. Select this to activate the logging function at the interval you set in this field. Click this to hide the advanced settings of 3G backup. Click Apply to save your changes back to the Device. Click Cancel to return to the previous configuration. 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. VMG4381-B10A User's Guide 93