Cisco Unified Communications Manager Express (formerly known as Cisco Unified Call Manager Express) is a call-processing application in Cisco IOS software that enables Cisco routers to deliver key-system or hybrid PBX functionality for enterprise branch offices or small businesses.

The Network-Advantage license is required for the CME feature on the ESR6300:

IP Phones are powered by ESR6300 LAN ports PoE/PoE+ and can negotiate power if they support the CDP/LLDP protocols.

There are several sources of information available for Call Manager Express:

• Product Marketing Information

• Cisco Unified Communications Manager Express System Administrator Guide

• All of the Support Information

• Basic Configuration Guide for CUCME/CME

• Cisco Unified Communications Manager Express FAQ

Generate configuration files for SCCP Phones:

telephony-service
max-ephones 24
max-dn 200
ip source-address 192.168.8.15 port 2000
load 7945 term45.default.loads
!
!
ephone-dn  8
number 1008
name sccp-08
!
!
ephone-dn  9
number 1009
name sccp-09
!
ephone  8
device-security-mode none
mac-address 00A3.D1F3.6FAD
type 7945
button  1:8
!
!         
ephone  9
device-security-mode none
mac-address 00A3.D1F3.6FC0
type 7945
button  1:9

SCCP Configuration tftp-server:

tftp-server bootflash:term45.default.loads
tftp-server bootflash:SCCP45.9-4-2SR3-1S.loads
tftp-server bootflash:cvm45sccp.9-4-2ES26.sbn
tftp-server bootflash:cnu45.9-4-2ES26.sbn
tftp-server bootflash:apps45.9-4-2ES26.sbn
tftp-server bootflash:jar45sccp.9-4-2ES26.sbn
tftp-server bootflash:dsp45.9-4-2ES26.sbn
!

The following are two examples of SCCP:

Router#sh telephony-service ephone
Number of Configured ephones 2 (Registered 0)
ephone 8   
Device Security Mode: Non-Secure
mac-address 00A3.D1F3.6FAD  
type 7945    
button  1:8   
keepalive 30 auxiliary 30
actual keepalive 30 auxiliary 30
multicast-moh
max-calls-per-button 8
busy-trigger-per-button 0
Always send media packets to this router: No
Preferred codec: g711ulaw
conference drop-mode never
conference add-mode all
conference admin: No
privacy: Yes
privacy button: No
user-locale US 
network-locale US
lpcor type: 
lpcor (incoming):             (outgoing): 
!
ephone 9    
Device Security Mode: Non-Secure
mac-address 00A3.D1F3.6FC0  
type 7945        
button  1:9  
keepalive 30 auxiliary 30
actual keepalive 30 auxiliary 30
multicast-moh
max-calls-per-button 8
busy-trigger-per-button 0
Always send media packets to this router: No
Preferred codec: g711ulaw
conference drop-mode never
conference add-mode all
conference admin: No
privacy: Yes
privacy button: No
user-locale US 
network-locale US
lpcor type: 
lpcor (incoming):             (outgoing): 
!
Router#sh telephony-service ephone-dn
 
ephone-dn 8    
number 1008    
name sccp-08    
preference 0 secondary 9
huntstop
call-waiting beep
no cti notify
no cti watch
ephone-dn 9    
number 1009   
name sccp-09    
preference 0 secondary 9
huntstop
call-waiting beep
no cti notify
no cti watch

Generate Configuration Profiles for SIP Phones:

voice register global
mode cme
source-address 192.168.8.16 port 5060
max-dn 20
max-pool 15
load 8845 sip8845_65.12-5-1SR2-2.loads
tftp-path flash:
file text
create profile sync 0095724401230545
ntp-server 192.168.8.15 mode unicast
auto-register
!
voice register dn  2
number 202
call-forward b2bua busy 100  
 call-forward b2bua noan 100 timeout 20
allow watch
name SIP-PHONE2
label 4085252002
voice register pool  2
busy-trigger-per-button 2
id mac 0045.1D86.F992
type 8845
number 1 dn 2
dtmf-relay sip-notify
codec g711ulaw

SIP Configuration TFTP-Server:

tftp-server flash:vc48845_65.12-5-1SR2-2.sbn
tftp-server flash:fbi8845_65.BEV-01-006.sbn
tftp-server flash:kern8845_65.12-5-1SR2-2.sbn
tftp-server flash:rootfs8845_65.12-5-1SR2-2.sbn
tftp-server flash:sb28845_65.BEV-01-015.sbn
tftp-server flash:sip8845_65.12-5-1SR2-2.loads
!

Two commands that are helpful in debugging are:

router#debug ccsip message
router#debug voice register event
router#
000313: *Jun 18 02:54:31.888: voice_reg_process_bulk_registration: preparing unsolicited sharedln registration for 6010@28.18.88.70
000314: *Jun 18 02:54:31.888: voice_reg_process_bulk_registration: preparing unsolicited sharedln registration for 6779@28.18.88.70
000315: *Jun 18 02:54:31.888: voice_reg_process_bulk_registration: preparing unot presence registration for watcher [sip:6010@28.18.88.70] presentity [sip:6777@28.18.88.1]
000316: *Jun 18 02:54:31.888: voice_reg_process_bulk_registration: preparing unot presence registration for watcher [sip:6010@28.18.88.70] presentity [sip:6506777@28.18.88.1]

The following are two examples of SIP:

Router#sh voice register global 
CONFIG [Version=12.6]
========================
  Version 12.6
  Mode is cme
  Auto-registration is enabled
  Max-pool is 15
  Max-dn is 20   
  Outbound-proxy is enabled and will use global configured value
  Security Policy: DEVICE-DEFAULT
  Forced Authorization Code Refer is enabled
  Source-address is 192.168.8.16 port 5060  
  Load 8845 is sip8845_65.12-5-1SR2-2.loads   
  NTP Server Address is 192.168.8.15
  NTP Server Mode is: unicast
  Time-format is 12
  Total SIP phones registered: 1
  Total Registration Statistics
    Registration requests  : 8
    Registration success   : 2
    Registration failed    : 0
    unRegister requests    : 1
    unRegister success     : 1
    unRegister failed      : 0
    Auto-Register requests : 0
    Attempts to register 
           after last unregister : 0 
    Last register request time   : 11:29:38.113 PDT Mon Jul 8 2019 
    Last unregister request time : 07:16:06.845 PDT Wed Jul 3 2019 
    Register success time        : 11:29:38.113 PDT Mon Jul 8 2019 
    Unregister success time      : 07:16:06.845 PDT Wed Jul 3 2019 

Router#sh voice register dn 2 
Dn Tag 2   
Config:
  Number is 202  
  Preference is 0
  Huntstop is disabled
  Name SIP-PHONE2    
  Allow watch is enabled
  Auto answer is disabled
  Label is 4085252002
  call-forward b2bua busy 100
  call-forward b2bua noan 100 timeout 20
  Pool 2    has this DN configured for line 1