CME SIP issue - Cisco 7821 phone not registering

Question

Hi
I am having issues with getting a Cisco 7821 phone to register.
Current deployment is with Cisco 6921 phones SCCP registration
SIP integration with CUE
SIP integration with Mitel system
c2951-universalk9-mz.SPA.154-3.M1.bin (CME 10.5)
In flash:
rootfs78xx.10-1-1SR1-4.sbn
kern78xx.10-1-1SR1-4.sbn
sboot78xx.10-1-1SR1-4.sbn
sip78xx.10-1-1SR1-4.loads
The 7821 phone gets IP address but fails to register. Please could somebody let me know why phone is not registering.
Configuration below (10.245.226.132 is CME address) .
voice service voip
 allow-connections h323 to h323
 allow-connections h323 to sip
 allow-connections sip to h323
 allow-connections sip to sip
 fax protocol pass-through g711ulaw
 modem passthrough nse codec g711ulaw redundancy maximum-sessions 5
 h323
 sip
  registrar server expires max 600 min 60
  options-ping 90
voice class codec 1
 codec preference 1 g711alaw
 codec preference 2 g711ulaw
 codec preference 3 g729r8
voice register global
 mode  cme
 source-address 10.245.226.132 port 5060
 max-dn 30
 max-pool 10
 load 7821 sip78xx.10-1-1SR1-4
 authenticate register
 authenticate realm all
 timezone 22
 date-format D/M/Y
 voicemail 590
 tftp-path flash:
 create profile sync 0061443538560005
 network-locale GB
voice register dn  1
 number 1010
 name user1
 label user1
 mwi
voice register pool  1
 busy-trigger-per-button 2
 id mac F09E.636E.63F2
 type 7821
 number 1 dn 1
 presence call-list
 dtmf-relay rtp-nte
 username 1010 password 123
 codec g711ulaw
 no vad
dial-peer voice 391 voip
 description *** Auto Attendant ***
 destination-pattern 399
 session protocol sipv2
 session target ipv4:10.245.226.131
 dtmf-relay sip-notify
 codec g711ulaw
 no vad
dial-peer voice 392 voip
 description *** Administration Via Telephone ***
 destination-pattern 392
 session protocol sipv2
 session target ipv4:10.245.226.131
 dtmf-relay sip-notify
 codec g711ulaw
 no vad
dial-peer voice 393 voip
 description *** Extension Assigner ***
 service ea out-bound
 destination-pattern 393
 session target ipv4:10.245.226.132
dial-peer voice 590 voip
 description *** Voice Mail Pilot ***
 destination-pattern 590
 b2bua
 session protocol sipv2
 session target ipv4:10.245.226.131
 dtmf-relay sip-notify
 codec g711ulaw
 no vad
dial-peer voice 1 pots
 description ** Match all incoming POTS calls **
 translation-profile incoming IncomingPSTNcalls
 incoming called-number .
 direct-inward-dial
dial-peer voice 899 voip
 description Call to Mitel
 translation-profile incoming Prefix9
 translation-profile outgoing rem44
 destination-pattern [23]..
 session protocol sipv2
 session target ipv4:192.168.114.2
 voice-class codec 1 
 dtmf-relay rtp-nte
 no vad
interface GigabitEthernet0/0
 description *** Connection to Mitel Phone System  ***
 ip address 192.168.114.5 255.255.255.248
 duplex auto
 speed auto
interface ISM0/0
 description *** Connection to Cisco Unity Express ***
 ip unnumbered GigabitEthernet0/1
 service-module ip address 10.245.226.131 255.255.255.128
 !Application: CUE Running on ISM
 service-module ip default-gateway 10.245.226.132
interface GigabitEthernet0/1
 description *** Connection to IP Phone LAN ***
 ip address 10.245.226.132 255.255.255.128
 duplex auto
 speed auto
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
ip http path flash:
ip route 0.0.0.0 0.0.0.0 10.245.226.129
ip route 10.245.226.131 255.255.2
tftp-server flash:apps37sccp.1-4-4-0.bin
tftp-server flash:sip78xx.10-1-1SR1-4.loads
tftp-server flash:rootfs78xx.10-1-1SR1-4.sbn
tftp-server flash:sboot78xx.10-1-1SR1-4.sbn
sip-ua
 mwi-server ipv4:10.245.226.131 expires 3600 port 5060 transport udp
 registrar ipv4:10.245.226.132 expires 600
gatekeeper
 shutdown
telephony-service
 authentication credential cmeadmin c4p1ta2012
 xml user xmladmin password xmladmin 15
 extension-assigner tag-type provision-tag
 max-ephones 104
 max-dn 299
 ip source-address 10.245.226.132 port 2000
 auto assign 101 to 105
 no service directed-pickup
 timeouts interdigit 5
 system message CFGS
 url services http://10.245.226.131/voiceview/common/login.do
 url authentication http://10.245.226.132/CCMCIP/authenticate.asp 
 cnf-file location flash:
 cnf-file perphone
 load 7931 SCCP31.9-2-1S
 load 6921 SCCP69xx.9-2-1-0
 time-zone 22
 date-format dd-mm-yy
 voicemail 590
 max-conferences 8 gain -6
 call-forward pattern .T
 moh enable-g711 "music-on-hold.au"
 web admin system name cmeadmin secret 5 $1$QmIK$46fDKVSudMxzI2bRp/Ef7/
 time-webedit
 transfer-system full-consult
 transfer-pattern .T
 secondary-dialtone 9
 create cnf-files version-stamp Jan 01 2002 00:00:00
ephone-dn  298
 number 598...
 mwi on
ephone-dn  299
 number 599...
 mwi off

Answer 1

Page 7 of the following link recommends that you use option 150 with the Cisco 7800 series phones and use option 66 if you cannot use option 150
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/7821_7841_7861/10_1/english/admin_guide/PA2D_BK_AB3F74DA_00_admin-7821-7841-7861-10_0/PA2D_BK_AB3F74DA_00_admin-7821-7841-7861-10_0_chapter_01.pdf
Dynamic Host Configuration Protocol (DHCP)
DHCP dynamically allocates and assigns an IP address to network devices.
DHCP enables you to connect an IP phone into the network and have the phone become operational without your needing to manually assign an IP address or to configure additional network parameters.
DHCP is enabled by default. If disabled, you must manually configure the IP address, subnet mask, gateway, and a TFTP server on each phone locally.
Cisco recommends that you use DHCP custom option 150. With this method, you configure the TFTP server IP address as the option value. For additional supported DHCP configurations, go to the "Dynamic Host Configuration Protocol" chapter and the "Cisco TFTP" chapter in the Cisco Unified Communications Manager System Guide.
Note   
If you cannot use option 150, you may try using DHCP option 66.