Call Manager Express (CME) Basic Configuration

Here is my simple configuration of Call Manager Express version 4.0 running IOS 12.4(9) in Router ISR 2801:

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telephony-service
 no auto-reg-ephone
 max-ephones 5
 max-dn 10
 ip source-address 192.168.88.5 port 2000
 system message CISCO VOICE LAB
 time-format 24
 web admin system name webadmin secret 5 cisco123
 dn-webedit
 time-webedit
 create cnf-files
!
ephone-dn  1  dual-line
 number 5060
!
ephone-dn  2 dual-line
 number 5061
!
ephone-dn  3  dual-line
 number 5062
!
ephone  1
 mac-address 000C.DE34.AAAA
 type CIPC
 button  1:1
 button  2:3
!
ephone  2
 mac-address 000C.220E.BAAB
 type 7941
 button  1:2
!
!
 ---------------------
done...