1. Cisco router with IOS voip support.
2. TFTP Server
3. CME file (you can dwonload it from Cisco website).

Lets begin…

1. Download CME file from Cisco website (file name: cme-gui-4.1.0.1.tar)
2. Assign an IP address to Cisco LAN interface that same segment with your PC and test ping to your PC (example: 10.10.10.1).
3. Install a TFTP server on your PC with same network with your cisco router (example: 10.10.10.2) and put CME file (file name: cme-gui-4.1.0.1.rar) in TFTP root direcory
4. Activate HTTP and HTTPS Server.
5. Instal CME on cisco router.
6. And… finish.

Router>
Router>ena
Password:
Router#config term
Router (config)#ip http server
Router (config)#ip http authentication local
Router (config)#ip http path flash:
Router (config)#archive tar /xtract tftp://10.10.10.2/cme-4.1.0.1.tar
Router (config)#username cmeadmin privilege 15 secret cisco
Router (config)#line con 0
Router (config-line)#logging sync
Router (config-line)#end
Router#

And then open http://10.10.10.1/telephony-services.html from your PC.
Fill username cmeadmin and password cisco, and ready to setup you IP Phone extension.

Requirement:
- 2 units Cisco router with 1 VIC2FXS and 1 WAN interface
- WAN link
- 1 Analog Phone Handset (2 wire) each site
- IOS voice support
- Phone numbering plan, eg. 1001 and 2001

SITE A

hostname RouterA
!
enable password 123
!
interface FastEthernet 0
 no description
 no ip address
 shutdown
!
interface Serial 0
 no shutdown
 description connected to RouterB
 ip address 10.10.10.1 255.255.255.252
 encapsulation hdlc
 ip rtp header-compression
!
voice-port 1/0
 no shutdown
 description connected to Phone (1001)
 comfort-noise
 cptone US
 signal loopStart
!
voice-port 1/1
 no shutdown
 no description
!
dial-peer voice 1 pots
 port 1/0
 destination-pattern 1001
!
dial-peer voice 3 voip
 codec g729r8
 ip precedence 5
 session target ipv4:10.10.10.2
 vad
 destination-pattern 2001
!
ip route 0.0.0.0 0.0.0.0 10.10.10.2
!
line console 0
 exec-timeout 0 0
 password 123
 login
!
line vty 0 4
 password 123
 login
!
end

===

SITE B

hostname RouterB
!
enable password 123
!
interface FastEthernet 0
 no description
 no ip address
 shutdown
!
interface Serial 0
 no shutdown
 description connected to RouterA
 ip address 10.10.10.2 255.255.255.252
 encapsulation hdlc
 ip rtp header-compression
!
voice-port 1/0
 no shutdown
 description connected to Phone_1 (2001)
 comfort-noise
 cptone US
 signal loopStart
!
voice-port 1/1
 no shutdown
 no description
!
dial-peer voice 1 pots
 port 1/0
 destination-pattern 2001
!
dial-peer voice 3 voip
 codec g729r8
 ip precedence 5
 session target ipv4:10.10.10.1
 vad
 destination-pattern 1001
!
ip route 0.0.0.0 0.0.0.0 10.10.10.1
!
line console 0
 exec-timeout 0 0
 password 123
 login
!
line vty 0 4
 password 123
 login
!
end