Specifications

Configuring Resource Pool Management
RPM Overview
DC-712
Cisco IOS Dial Technologies Configuration Guide
Figure 102 Call Discrimination
Incoming Call Preauthentication
With ISDN PRI or channel-associated signaling (CAS), information about an incoming call is available
to the NAS before the call is connected. The available call information includes:
• The DNIS, also referred to as the called number
• The CLID, also referred to as the calling number
• The call type, also referred to as the bearer capability
The Preauthentication with ISDN PRI and Channel-Associated Signalling feature introduced in
Cisco IOS Release 12.2 allows a Cisco NAS to decide—on the basis of the DNIS number, the CLID
number, or the call type—whether to connect an incoming call.
When an incoming call arrives from the public network switch, but before it is connected, this feature
enables the NAS to send the DNIS number, CLID number, and call type to a RADIUS server for
authorization. If the server authorizes the call, the NAS accepts the call. If the server does not authorize
the call, the NAS sends a disconnect message to the public network switch to reject the call.
The Preauthentication with ISDN PRI and Channel-Associated Signalling feature offers the following
benefits:
• With ISDN PRI, it enables user authentication and authorization before a call is answered. With
CAS, the call must be answered; however, the call can be dropped if preauthentication fails.
• It enables service providers to better manage ports using their existing RADIUS solutions.
• Coupled with a preauthentication RADIUS server application, it enables service providers to
efficiently manage the use of shared resources to offer differing service-level agreements.
For more information about the Preauthentication with ISDN PRI and Channel-Associated Signalling
feature, refer to the Cisco IOS Security Configuration Guide.
23734
dnis123
5267000
5267001
CD Name
Call discriminator
definitions
Internal disallowed calls table
DNIS groups
CD123
CDabc
CDspeech
CDv120
DNIS Group
dnis123
dnisabc
dnisspeech
default
DNIS
5267000
5267001
5271299
527499
default
Call Type
speech
speech
digital
digitalv110v120
v120
Call Types
speech
digital
digitalv110v120
v120
Reject calls to DNIS group dnis123 with speech call type
Reject calls to DNIS group dnisabc with digital call type
Reject calls to DNIS group dnisspeech that are not speech
Reject all calls that are V.120
Reject calls to 5267000 with speech call type
Reject calls to 5267001 with speech call type
Reject digital calls to 5271299
Accept only speech calls to 5274999
Reject all V.120 calls
dnisabc
527 1299
dnisspeech
5274999
Reserved keyword
identifying default
DNIS reaching all
values