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User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform
Chapter 1
DDR Configuration
1-13
Table DC-1-22 Configure the features of the dial interface
Operation Command
Set fast-idle time dialer fast-idle seconds
Set idle-timeout time dialer idle-timeout seconds
Set wait-for-carrier-time dialer wait-for-carrier-time seconds
Set autodial interval dialer autodial-interval seconds
V. Bind physical interfaces for a dialer pool
The following steps are enough to bind a physical interface for a Dialer Pool.
Table DC-1-23 Configure a physical interface for a dialer pool
Operation Command
Enter the configuration mode of the designated physical
interface (used in global configuration mode)
interface interface-type interface-number
Select PPP encapsulation (used in the configuration mode of
the designated physical interface)
encapsulation ppp
Set CHAP authentication (used in the configuration mode of the
designated physical interface)
ppp authentication chap
Designate this interface as a member of a Dialer Pool, and set
its priority (use this command again to designate this interface
as a member of another Dialer Pool at the same time) (used in
the configuration mode of the designated physical interface)
dialer pool-member number [ priority priority ]
1.4.3 Configuring Callback
I. The significance of callback
Callback enables “call receiver” to call back “call sender” so as to:
z Enhance security: in callback processing, Server end calls Client (as above) end
according to locally configured call number, thus avoiding insecurity due to
disclosed user name and password.
z Save call charge (when the charge rates of two directions are different).
z
Change charge bearer.
z
Combine charge lists.
II. Terms and abbreviations
z
Client end: the first call originator, which requires the opposite end to call back the
local end.
z
Server end: the first call receiver, which will call back the opposite end.
III. Functions implemented by callback
Callback requires the common participation of two ends, one as Client end and the
other as Server end. The basic operation flow is: Client end originates a call as “call
sender”, Server end determines whether to call back; if so, Server end disconnects the
incoming call, and sends a call to Client end.
VRP1.3 implements the following two callback functions:
1) In PPP callback, the following supports are considered: