Operation Manual

102 NetWare MultiProtocol Router for ISDN 3.1 Installation and ISDN Configuration Guide
Code, ISDN Number, PBX Outside Line Access and PBX
Extension) of the remote site or the Dial-Back Number, if
configured, is compared with the number entered in the Call
Acceptance Database. This mode provides least security.
- CLI: only the number transmitted over the D channel is
compared with that entered in the Call Acceptance Database.
CLI (Call Line Identification) is a service of ISDN. To use CLI,
make sure that this service is enabled at all remote sites that
are allowed access to your router. Otherwise, they are denied
access by your router.
- CLI and Caller-Specified: the number transmitted over the D
channel and the origination address (made up from the
components International Dialing Prefix, Country Code, Area
Code, ISDN Number, PBX Outside Line Access and PBX
Extension) of the remote site or the Dial-Back Number, if
configured, are compared with the entries in the Call
Acceptance Database. This security mode provides highest
security. Normally, the caller-specifed and the CLI number
are identical. However, they can differ in rare cases (e.g. the
CLI number transmitted may be incomplete). In either case,
you have to make two entries in the Call Acceptance
Database for the respective remote site.
5. Check the Security Call-Back .
NetWare MultiProtocol Router for ISDN 3.1 provides a Security
Call-Back to provide highest network security. Call-back is
naturally only performed for an initial logical connection set-up
request from a remote site, and not for subsequent underlying
physical call set-ups from this site.
When one of the call-back modes is selected, the NetWare Multi-
Protocol Router for ISDN first disconnects an ISDN connection
coming in from a remote site and then dials back.
Default: Disabled
Options: Disabled, Force Call-Back to Caller-Specified Number,
Force Call-Back to CLI Number
With Force Call-Back to a Caller-Specified Number, the NetWare
MultiProtocol Router for ISDN takes the number delivered by
the remote site. This is either the origination address (made up
from the components International Dialing Prefix, Country