ZyXEL Communications VMG4325-B10A, Руководство пользователя

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Chapter 6 Broadband
VMG4380-B10A / VMG4325-B10A User’s Guide
94
Table 12
Comparison Table for Single DSL line and DSL Bonding
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.
ITEM VDSL2 VDSL BONDING ADSL2+
ADSL(2+)
BONDING
PROFILE/
STANDARD
G993.2 Profile 17a G993.2 Profile 12a G.992.5 G.992.5
MAX.
DOWNSTREAM/
UPSTREAM
100/60 Mbps 50/25 x 2 = 100/50
Mbps
25/1 Mbps 25/1 x 2 = 50/2
Mbps
DISTANCE
within 3000 ft over 3000 ft over 5000 ft 5000 to 7000 ft
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.