ZyXEL VMG4381 User Guide - Page 94

Chapter 6 Broadband Table 12 Comparison Table for Single DSL line and DSL Bonding ITEM PROFILE/ STANDARD MAX. DOWNSTREAM/ UPSTREAM DISTANCE VDSL2 VDSL BONDING G993.2 Profile 17a G993.2 Profile 12a 100/60 Mbps 50/25 x 2 = 100/50 Mbps within 3000 ft over 3000 ft ADSL2+ G.992.5 25/1 Mbps over 5000 ft ADSL(2+) BONDING G.992.5 25/1 x 2 = 50/2 Mbps 5000 to 7000 ft For a single VDSL2 line, the profile is 17a, which provides a maximum data rate of 100/60 Mbps (downstream/upstream). A VDSL2 17a bonding profile can reach 200Mbps/100Mbps. If VDSL bonding is used, the supported profile is 12a, which provides a maximum data rate of 50/25 Mbps for each VDSL line. The ideal total data rate for the bonded connection is 100/50 Mbps. For a single ADSL line, the standard with the highest data rate supported is ADSL2+, which provides 25/1 Mbps data rate. When ADSL bonding is used, the data rate doubles to 50/2 Mbps. In addition, DSL bonding supports ADSL bonding fallback. If a VDSL connection cannot be established, the Device tries to use ADSL. If the VDSL connection is re-established, the Device automatically switches back to VDSL. You must enable DSL bonding in order to use ADSL fallback. Click Network Setting > Broadband > Advanced to display the following screen. Figure 27 Network Setting > Broadband > Advanced The following table describes the labels in this screen. Table 13 Network Setting > Network Setting > Broadband LABEL DESCRIPTION State Select Enable to use the DSL bonding and ADSL fallback features. Make sure your ISP supports these functions. PTM over ADSL Select Enable to use PTM over ADSL. Since PTM has less overhead than ATM, some ISPs use PTM over ADSL for better performance. Annex M You can enable Annex M for the Device to use double upstream mode to increase the maximum upstream transfer rate. VMG4381-B10A User's Guide 94