Paging configuration in Call Manager Express

Just came across a requirement from a customer for implementing paging in Cisco Call Manager Express       ( CME )

The config is pretty much simple .

First  you need to define a ephone-dn for the paging and need to define a multicast ip address for paging.
The config will look like this  :

ephone-dn  5
 description Paging
 number 1001
 paging ip 239.0.1.20 port 2000

one u have configured the ephone-dn.
Apply the ephone-dn to the ephone you have configured in CME .

ephone  1
  paging-dn 5
!  
!
ephone  2
  paging-dn 5

Once the user dial 1001 from any phone .It will establish a one side audio to all the phone for paging.