Hi Arun,
As per the following link this feature requires Cisco Unified Communications Manager 10.0 or later.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/9971_9951_8961/firmware/9_4_1/english/release_notes/P567_BK_84CD4C2B_00_8961_9951_71-release-notes-9_4_1/P567_BK_84CD4C2B_00_8961_9951_71-release-notes-9_4_1_chapter_00.html#P567_TP_I9C54179_00
HTH
Manish