Cabletron Systems CSX100 series, Руководство пользователя, Страница: 89 / 153

Configuring Advanced Features 75
Note 1: Caller ID service (for the local router phone line) must first be
obtained from the ISDN provider. 7 or 10 digits may be presented by switch.
Note 2: The configured phone numbers must contain the actual digits
presented by the central office switch.
Enable Caller ID Security
⇒
To enable Caller ID Security systemwide, click ISDN Settings and check
the box Enable ISDN Caller ID Security .
⇒
To specify unique numbers for the remote router, click Remote Routers
and then Dial Settings . Check the appropriate radio button in the Dial-
Back box.
⇒
Click Dial-back Numbers to add or delete remote routers’ numbers.
⇒
Click Store to save the system settings and remote router database
configuration.
⇒
Then test Caller ID: If the call is rejected by the local router, check the
message displayed on the console message window in the Port Monitor or
use the
system history
command for the actual digits received and
reconfigure with the correct number.
ISDN Dial-Back
Dial-Back forces the local router to reject an incoming call from the remote
router and to dial the remote router back. This feature is used to cause ISDN
phone charge billing to the local router.
Dial-Back can be enabled, disabled, or enabled to only occur when the remote
router calls first. When Dial-Back is configured, the local router’s call delay
timer setting must allow for disconnect and dial back; the defaults are 30
seconds for the U.S., and 90 seconds for Europe and Japan.
Dial-Back prerequisites
In order for ISDN Dial-Back to work, the following features have to be
enabled:
•
Caller ID must be provided by the ISDN provider for the line receiving
the call (local router)