3Com 3C421600A, Management Manual

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80 C
HAPTER
6: C
ONFIGURING
N
ETWORK
D
IAL
-I
N
Configuring a Roaming Callback User (Dynamic)
Use the following steps to configure a roaming callback user:
1
Add the roaming callback user.
add user [ username] password [password] type network,callback
2 Set the roaming callback user as “dynamic.”
set user [ username] callback_type dynamic
3 Save your work.
save all
Calling Line
Identification
Callback
This section contains the following information:
■
Overview
■
Configuring CLID Callback
■
Troubleshooting CLID Callback
■
Case Study
Overview Using Calling Line Identification (CLID) callback, the RAS 1500 dials back
a remote dial-in user based on the user's Automatic Number
Identification (ANI).
Benefits of callback over dial-in:
■
Cheaper (in certain cases). Provides lower-cost connections when the
calling party's tariffs are higher than the service provider's tariffs.
■
More secure. Provides additional security because remote users must
be contacted at a phone number maintained at the service provider.
Benefits of CLID callback over PPP callback:
■
Cheaper. The remote user is not charged for initiating the CLID
callback because the remote user ANI information is transmitted
before a connection is established (via the D channel). To initiate a PPP
callback, the remote user must connect and, therefore, be charged.
■
Easier. It is easier for remote users to use because the callback number
is provided by the network, not the remote user.