Draytek Vigor2850 Series, Руководство пользователя

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Vigor2850 Series User’s Guide
260
dial-out function.
Dialup 64Kbps
allows you to use one
ISDN B channel for Internet access.
Dialup 128Kbps
allows you to use both ISDN B channels for Internet access.
Dialup BOD
(for detailed information of configuration,
please refer to section
3.13.4
) stands for
bandwidth-on-demand. The router will use only one B
channel in low traffic situations. Once the single B channel
bandwidth is fully used, the other B channel will be
activated automatically through the dialup. For more
detailed BOD parameter settings, please refer to the section
of
Call Control
.
PPP Authentication -
PAP only allows you to configure
the PPP session to use the PAP protocol to negotiate the
username and password with the ISP.
PAP or CHAP
is to
configure the PPP session to use the PAP or CHAP
protocols to negotiate the username and password with the
ISP.
Idle Timeout -
Idle timeout means the router will be
disconnect after being idle for a preset amount of time. The
default is 180 seconds. If you set the time to 0, the ISDN
connection to the ISP will always remain on.
IP Address Assignment
Method (IPCP)
In most environments, you should not change these settings
as most ISPs provide a dynamic IP address for the router
when it connects to the ISP. If your ISP provides a fixed IP
address, check
Yes
and enter the IP address in the field of
Fixed IP Address
.
Select
Dialing to Dual ISPs
if you have more than one ISP. You will be able to dial to both
ISPs at the same time. This is mainly for those ISPs that do not support Multiple-Link PPP
(ML-PPP). In such cases, dialing to two ISPs can increase the bandwidth utilization of the
ISDN channels to 128kbps data speed.