Cisco CallManager Express (CME) SIP Trunking Configuration Example
https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-express/91535-cme-sip-trunking-config.html

Cisco Unified Communications Manager Express System Administrator Guide - Cisco Unified CME Overview
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/admin/configuration/manual/cmeadm/cmeover.html

Cisco Unified Communications Manager Express SIP Trunk Integration Guide for Cisco Unity Connection Release 11.x
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/11x/integration/guide/cucme_sip/b_11xcucmesip.html

Cisco Unified Communications Manager Express: SIP Implementation Guide

https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-express/99946-cme-sip-guide.html

Dial Plan
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/admin/configuration/manual/cmeadm/cmedialp.html

CCNA Training Basic IP Phone Registration

Switch:
show POE phones
#show power inline

configure vlan
(config)# int fa 0/1-2
#switchport mode access vlan 10
#switchport mode access voice vlan 20
#spanning-tree portfast (?)

#show vlan brief

Configre port 12 for router trunck connection
#switchport trunk encapsulation dotlq
#switchport mode trunk all
#switchport trunk allowed vlan 10,20

Router:
#int fa 0/0
#int fa 0/0.10
#encapsulation dot1Q 10
#ip add 10.1.10.254 255.255.255.0
#interface fa 0/0.20
#encapsulation dot1Q 20
#ip add 10.1.20.254 255.255.255.0

#int loop 0
#ip add 10.1.1.1 255.255.255.0

dhcp 

Router(config)#ip dhcp pool Voice

Router(dhcp-config)#network 10.1.20.0 /24

Router(dhcp-config)#default-router 10.1.20.254

Router(dhcp-config)option 150 ip 10.1.1.1

Router(config)#show ip dhcp bind

Router(config)tftp-server flash:sccp45.9-1-1SR!S. loads

Telephony

#telephony-service

Router(config-telephony)#cnf-file location tftp

...

Router(config-telephony)#max-ephones 10

Router(config-telephony)#max-dn 10

Router(config-telephony)#ip source-address 10.1.1.1 (call manager's ip ?)

Router(config-telephony)#create cnf-files...

Router(config-telephony)#debug tftp events (to find out information...)

Router(config)#show ip dhcp bind (find MAC associated)

Router(config)#ephone 1

Router(config-ephone)#mac XXX...

Router(config)#ephone 2

Router(config-ephone)#mac XXX...

Router(config-ephone)#ephone-dn 1

Router(config-ephone-dn)#number 1001

Router(config-ephone)#ephone-dn 2

Router(config-ephone-dn)#number 1002

Associate the number with the ephones

Button 1:1 (button ephone-line# : dn's number, e.g. ephone 1 : dn 1)

Router(config-ephone-dn)#ephone 1

Router(config-ephone)#button 1:1

Router(config-ephone)#reset

Router(config-ephone-dn)#ephone 2

Router(config-ephone)#button 1:2

Router(config-ephone)#reset

Router(config-ephone)#show ephone reg

Show Registered sip phones
router#show voice register statistics