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61 - 165 IP Telephony v1.0 Lab 4.1.3 Copyright © 2005, Cisco Systems, Inc.
Step 2 Configure the ISDN Switch Type
a. From global configuration mode, use the command isdn switch-type primary-ni to set the PRI
switch type. Note that this type must be the same one being used by the provider. In this lab, the
provider is the Adtran unit, and it has been configured with the primary-ni ISDN switch type.
CMERouterX(config)# isdn switch-type primary-ni
b. What other ISDN switch types are available? ________________________________________
___________________________________________________________________________
Step 3 Configure the T1 Controller
a. The network-clock-participate command allows the ports on a specific module or voice WAN
interface card (VWIC) to use the network clock for timing. The alternative is to restrict a device to
use its own clocking signals.
b. From global configuration mode, enter the command network-clock-participate wic
slot_number (where slot_number is the physical slot where the T1 port is installed). An
example is as follows: CMERouterX(config)# network-clock-participate wic 1
or CMERouterX(config)# network-clock-participate slot 1
CMERouterX(config)# network-clock-participate wic slot number
c. From global configuration, type controller t1 ? to determine what slot numbers are available. If
there is only one T1 card installed, only one number lists.
d. How many slot numbers are available in the help output? ____________
e. From global configuration mode, enter the mode to control the T1 port by using the controller t1
slot/port_or_subslot/port command. The slot/port_or_subslot/port parameters are the same
as what was researched earlier. An example in the 2811 router would be controller t1 1/0/0 or
controller t1 1/0 (depending on NM-HDV2-1T1/E1 type).
CMERouterX(config)# controller t1 slot/port_or_subslot/port
f. In T1 controller mode, enter the command framing esf to set the type of framing used.
CMERouterX(config-controller)# framing esf
g. In T1 controller mode, enter the command linecode b8zs to set the line coding.
CMERouterX(config-controller)# linecode b8zs
h. Set the clocking to the line with the clock source line command.
CMERouterX(config-controller)# clock source line
i. Use the command pri-group timeslots 1-12 to assign the first 12 channels to the PRI.
CMERouterX(config-controller)# pri-group timeslots 1-12
Note: If an error appears that there are not enough DSP resources, reduce the number of
timeslots to 8 (1-8 in the command).
The B channels on the TI should go up and messages to that effect should be seen on the
console.