Wireless Lan; Basic Concepts - Draytek Vigor2820 Series User Manual

Bandwidth-On-Demand
(BOD) Setup
3 . 1 3 W i r e l e s s
3 . 1 3 W i r e l e s s
This function is used for "n" models only.
3 . 1 3 . 1 B a s i c
3 . 1 3 . 1 B a s i c
Over recent years, the market for wireless communications has enjoyed tremendous growth.
Wireless technology now reaches or is capable of reaching virtually every location on the
surface of the earth. Hundreds of millions of people exchange information every day via
wireless communication products. The Vigor "n" model, a.k.a. Vigor wireless router, is
designed for maximum flexibility and efficiency of a small office/home. Any authorized
staff can bring a built-in WLAN client PDA or notebook into a meeting room for conference
without laying a clot of LAN cable or drilling holes everywhere. Wireless LAN enables high
mobility so WLAN users can simultaneously access all LAN facilities just like on a wired
LAN as well as Internet access.
The Vigor wireless routers are equipped with a wireless LAN interface compliant with the
standard IEEE 802.11n protocol. To boost its performance further, the Vigor Router is also
loaded with advanced wireless technology to lift up data rate up to 300 Mbps*. Hence, you
can finally smoothly enjoy stream music and video.
Note:
environmental factors, including volume of network traffic, network overhead and
building materials.
In an Infrastructure Mode of wireless network, Vigor wireless router plays a role as an
Access Point (AP) connecting to lots of wireless clients or Stations (STA). All the STAs will
share the same Internet connection via Vigor wireless router. The General Settings will set
up the information of this wireless network, including its SSID as identification, located
channel etc.
Vigor2820 Series User's Guide
L A N
L A N
C o n c e p t s
C o n c e p t s
The actual data throughput will vary according to the network conditions and
*
Bandwidth-On-Demand is for Multiple-Link PPP \(ML-PPP
or MP). The parameters are only applied when you set the
Link Type to Dialup BOD. The ISDN usually use one B
channel to access the Internet or remote network when you
choose the Dialup BOD link type. The router will use the
parameters here to decide on when you activate/drop the
additional B channel. Note that cps (characters-per-second)
measures the total link utilization.
High Water Mark and High Water Time - These
parameters specify the situation in which the second channel
will be activated. With the first connected channel, if its
utilization exceeds the High Water Mark and such a channel
is being used over the High Water Time, the additional
channel will be activated. Thus, the total link speed will be
128kbps (two B channels).
Low Water Mark and Low Water Time - These parameters
specify the situation in which the second channel will be
dropped. In terms of the two B channels, if their utilization is
under the Low Water Mark and these two channels are being
used over the High Water Time, the additional channel will be
dropped. As a result, the total link speed will be 64kbps (one
B channel).
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