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Vigor2800 Series User’s Guide
121
TCP Header Compression VJ Compression - It is used for TCP/IP protocol header
compression. Normally it is set to None to improve bandwidth
utilization.
Idle Timeout Because our ISDN link type is “Dial On Demand”, the
connection will be initiated only when needed.
High Water Mark and
High Water Time
BOD stands for bandwidth-on-demand for Multiple-Link PPP
(ML-PPP or MP). High Water Mark/ High Water Time/
Low Water Mark/Low Water Time parameters are applied
when you set the Link Type to Dialup BOD. The ISDN
usually uses 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.
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).
Note: If you are not sure whether your ISP can support BOD and/or ML-PPP’s
features, please seek assistance from your ISP, local dealers or our website:
support@draytek.com.
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This function is used for G models only.
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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 G 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 802.11g protocol. To boost its performance further, the Vigor Router is also