Cisco 7821 phone not registering on CME 14.1

[hnievat]

Greetings,

I'm trying to get a Cisco 7821 phone to register within a Cisco 8200 router with Call Manager Express 14.1 installed and a perpetual Network Advantage license already activated. The 8200 CME is currently on a test environment and isn’t connected yet to a Voice Gateway, PBX or PSTN.

The problem is that the phone won't register, as the CME will not accept “7821” as a valid attribute for the “load” command, and when trying to use the “fast track” method to add support for this model, it says that it is already built-in. DHCP works between the phone and the router, so everything seems to be okay up to layer 3.

More visually this is what is happening:

Router(config-telephony)#load 7821 ?
% Unrecognized command

And

Router(config)#voice register pool-type 7821
ERROR: 7821 is built-in phonemodel, can not be changed

The software version on the router is Cisco IOS XE Software, Version 17.12.03a and the image file is “bootflash:c8000be-universalk9.17.12.03a.SPA.conf”.

The phone cycles between "Unprovisioned", "Registering", and "Registration in progress". I've also tried resetting the phone to factory defaults to no avail.

Thanks in advance for your help.

Here's the relevant config on the router:

!
ip dhcp excluded-address 192.168.1.1
!
ip dhcp pool voice
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
option 150 ip 192.168.1.1
!
…
!
voice service voip
 ip address trusted list
  ipv4 192.168.1.2
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
trace
sip
  registrar server expires max 600 min 60
!
!
!
!
!
!
voice register global
default mode
no allow-hash-in-dn
!
…
!
interface GigabitEthernet0/0/1
ip address 192.168.1.1 255.255.255.0
negotiation auto
!
…
!
tftp-server bootflash:/sboot78xx.14-3-1-0201-246.sbn alias sboot78xx.14-3-1-0201-246.sbn
tftp-server bootflash:/sboot2.78xx.14-3-1-0201-246.sbn alias sboot2.78xx.14-3-1-0201-246.sbn
tftp-server bootflash:/rootfs78xx.14-3-1-0201-246.sbn alias rootfs78xx.14-3-1-0201-246.sbn
tftp-server bootflash:/rootfs2.78xx.14-3-1-0201-246.sbn alias rootfs2.78xx.14-3-1-0201-246.sbn
tftp-server bootflash:/kern78xx.14-3-1-0201-246.sbn alias kern78xx.14-3-1-0201-246.sbn
tftp-server bootflash:/kern2.78xx.14-3-1-0201-246.sbn alias kern2.78xx.14-3-1-0201-246.sbn
tftp-server bootflash:/sip78xx.14-3-1-0201-246.loads alias sip78xx.14-3-1-0201-246.loads
!
…
!
telephony-service
max-ephones 2
max-dn 2
ip source-address 192.168.1.1 port 2000
auto-register 1
max-conferences 8 gain -6
transfer-system full-consult
create cnf-files version-stamp Jan 01 2002 00:00:00
!
!
!
!
ephone-dn  1
number 1111
!
!
ephone-dn  2
number 2222
!
!
ephone  1
device-security-mode none
mac-address 10E3.76XX.XXXX
button  1:1
!
!
!
ephone  2
device-security-mode none
!
…

[Leo Laohoo]

CME Device Pack (cmterm-devicepack14.0.1)

[Roger Kallberg · Accepted solution]

The 78xx series of phones are SIP devices, so ephone configuration isn’t applicable as that’s for SCCP devices. Advice you to read up on configuring CME with SIP devices in this document. Cisco Unified Communications Manager Express System Administrator Guide

[Nithin Eluvathingal]

You don't need to define a pool type, as this was only necessary for the fast-track option when 78XX phones weren't natively supported on CME.

Since you're using version 14, the "voice register pool-type 7821" command is unnecessary.

Your current setup includes SCCP configuration, but the required configurations for SIP phones are missing. To enable SIP phones to register with CME, configure voice register global, voice register dn, and voice register pool. With your existing configuration, only SCCP phones can register.

Here’s a video explaining how to register a SIP phone on CME.

https://video.cisco.com/detail/video/6348686754112

[hnievat]

Thanks for the advice, everyone. Configuring voice register global, voice register dn, and voice register pool was necessary, particularly these two commands under voice register global:

tftp-path flash:

and

create profile