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113 - 165 IP Telephony v1.0 Lab 5.1.9 Copyright © 2005, Cisco Systems, Inc.
m. The paging function allows you to dial a number and talk to a group of IP phones. In this
scenario, the X500 (where X is the pod number) represents Sales, which could be a group of
Sales representatives that have IP phones. The other paging function was assigned a number of
X600 that represents Support. This could be the IT support staff. A helpdesk call could come in
for the mail server and three administrators can manage the mail server. The helpdesk staff can
dial one number and page one of the three administrators to pick up on a particular phoneline.
Test the paging function by dialing X500 (where X is the pod number) from the analog phone.
Also test the paging function with the X600 number (where X is the pod number) from the analog
phone.
n. Does the paging function work properly? If not, troubleshoot as necessary. ______
Step 2 Configure a combined group
a. Access the router CLI and view the current configuration.
b. Write down all dialer numbers currently in use (ephone-dn).
_____________________________________________________________________________
_____________________________________________________________________________
c. From global configuration mode, type the command ephone-dn ?.
d. How many dialer numbers are possible? ___________________________________________
e. From global configuration mode, type the command ephone-dn X (where X is an unused dialer
number) to create a new dialer number.
f. What dialer number was chosen? _________________________
g. Assign a directory number to the page using the number X700 command (where X is the pod
number).
CMERouterX(config-ephone-dn)# number X700
h. Enter the name EmergencyAll command to assign a name.
CMERouterX(config-ephone-dn)# name EmergencyAll
i. The paging command is used to specify that this dialer number is used to broadcast audio
paging messages to idle IP phones. The ip parameter, when used with the paging command,
specifies that multicasting is used to do the audio paging. The number that follows is the
multicast group number. Note that Cisco IP phones do not support multicasting to a multicast
address of 224.X.X.X. The port parameter followed by a number defines the UDP port number
used to communicate the message to the IP phone. The number 2000 is recommended because
it is already used for normal non-multicast messaging.
Enter the command paging ip 239.1.1.1 port 2000.
CMERouterX(config-ephone-dn)# paging ip 239.1.1.1 port 2000
j. The paging group command allows multiple groups already created to be combined into one
group. The group numbers that follow are separated by one or more commas. The group
number is the sequence number (ephone-dn - dial numbers) configured through the Web
interface earlier in the lab. Refer back to the sequence numbers used earlier in the lab. These
will be the X and Y values used in the command. For example, if sequence numbers 9 and 10
were used previously, the command entered would be paging group 9,10.
CMERouterX(config-ephone-dn)# paging group X,Y