3Com 10014299 Features of Isdn caller identification callback, Dialer callback-center dial-number

Configuring DCC 725

By default, the system does not enable callback function and is not configured with any Windows NT server callback dial number.

2Configure the PPP callback server in the resource-shared DCC implementation

When resource-shared DCC are adopted to implement PPP callback, the PPP authentication configuration at server end is the same as that of circular DCC, except that the server in the resource-shared DCC implementation can only originate a return call according to the dial number configured in the local-usercallback-numbercommand. See “Configure the PPP callback server in the circular DCC implementation” in Dial-up.

Use the local-usercallback-numbercommand to configure the callback user and callback dial number in system view, and perform other configurations in dialer interface view.

Table 760 Implement PPP Callback (Server Configuration) in Resource-Shared DCC

Operation	Command
Configure the callback user and callback	local-user username callback-number
number	telephone-number
Configure the local end to be the PPP	ppp callback server
callback server
Disable the local end to be the PPP	undo ppp callback server
callback server
Configure the PPP callback reference	dialer callback-center dial-number
Disable the callback server function of the	undo dialer callback-center
router

By default, the system does not enable the callback function.

Configuring ISDN Caller In an ISDN environment, implementing DCC callback through the ISDN caller Identification Callback identification function requires no authentication, nor are there other

configurations requirements.

Features of ISDN caller identification callback

In the applications of ISDN caller identification callback, the callback server can process a incoming call in three ways, depending on the matching result of the calling number and the dialer call-in command at the local end:

■Denies the incoming call: The dialer call-incommand has been configured, but no match is found for the dial-in number and the configured dialer callers.

■Accepts the incoming call: The dialer call-incommand is not configured, or a match is found for the dial-in number and a dialer call-incommand configured without the keyword “callback”.

■Calls back: The dialer call-incommand has been configured, and a match is found for the dial-in number and a dialer call-incommand configured with the keyword callback.

The best match for the incoming number and the dialer call-incommands is determined on the basis of right-most matching. The character “*” in the number represents any characters. If multiple dialer call-incommands match the incoming number, the following rules will apply for determining the best match:

■Primary rule: The best match is the number with the fewest “*”.