Cisco AS5350 - Universal Access Server - Configuring ISDN NFAS on CT1 PRI Groups; Configure

4-5
Cisco AS5350 and Cisco AS5400 Universal Gateway Software Configuration Guide
OL-3418-02 B0
Chapter 4 Continuing Configuration Using the Command-Line Interface
Configuring ISDN NFAS on CT1 PRI Groups
channel-group 2 timeslot 8
channel-group 3 timeslot 9-11
pri-group timeslot 12-24
Configuring ISDN NFAS on CT1 PRI Groups
ISDN Non-Facility Associated Signaling (NFAS) allows a single D channel to control multiple PRI
interfaces. A backup D channel can also be configured for use when the primary NFAS D channel fails.
When configuring NFAS for channelized T1 controllers configured for ISDN, you use an extended
version of the ISDN pri-group command to specify the following:
• Range of PRI timeslots to be under the control of the D channel (timeslot 24)
• Function to be performed by timeslot 24 (primary D channel, backup, or none); the latter specifies
its use as a B channel
• Group identifier number for the interface under control of this D channel
Note Your Cisco AS5350 or Cisco AS5400 must connect to a Primary-4ess, Primary-DMS 100, or Primary-NI
switch (see Table 3-3 on page 3-16) and must also have a channelized T1 controller and, as a result, be
ISDN PRI capable.
Configure
To configure ISDN NFAS, complete the following tasks in controller configuration mode:
Command Purpose
AS5350(config-controller)# pri-group
timeslots 1-24 nfas_d primary
nfas_interface number nfas_group number
On one channelized T1 controller, configures the
NFAS primary D channel.
AS5350(config-controller)# pri-group
timeslots 1-24 nfas_d backup nfas_interface
number nfas_group number
On a different channelized T1 controller,
configures the NFAS backup D channel to be used
if the primary D channel fails.
AS5350(config-controller)# pri-group
timeslots 1-24 nfas_d none nfas_interface
number nfas_group number
(Optional) On other channelized T1 controllers,
configures a 24 B channel interface, if desired.