Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 1 DCC Configuration Commands
3Com Corporation
1-4
DCC will call back the remote end according to the callback-number configured in the
local-user command.
When both user and dial-number are applied concurrently, the router will first attempt
to place a return call according to the first parameter. If the callback attempt fails, it will
try the second parameter for callback.
Related command: ppp callback, ppp authentication-mode.
Example
# Configure a remote username and set the router to call the user back.
[3Com ] local-user 3Com b password simple 3Com b
[3Com ] interface serial0/0/0
[3Com -Serial0/0/0] dialer route ip 1.1.1.2 user 3Com b 8810052
[3Com -Serial0/0/0] dialer callback-center user
1.1.5 dialer call-in
Syntax
dialer call-in remote-number [ callback ]
undo dialer call-in remote-number [ callback ]
View
Physical or dialer interface view
Parameter
remote-number: Used for matching the remote incoming call number. The character “*”
represents any character.
callback: When calling back the server end, the incoming number will match with the
dialer call-in command containing this keyword and originate a callback.
Description
Use the dialer call-in command to enable ISDN callback according to ISDN caller ID.
Use the undo dialer call-in command to cancel the configuration.
By default, ISDN callback according to ISDN caller ID is not configured.
This command must be configured at the server end when ISDN caller ID is applied for
callback. In Resource-Shared DCC, because both PPP and frame relay protocols can
be encapsulated on dialer interfaces, ISDN interface can encapsulate link layer
protocol dynamically according to corresponding dialer interface.
The caller first searches corresponding dialer interface by matching the caller number
with the dialer number command. The dialer call-in command is used to preprocess
the ISDN call-in number, determining whether the user with this number can be