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7821 SIP Phone will not Register with CME - Config Attached

Level 1
Level 1

Hello Everyone, 

 I have a 3925E running CME 11.0 with a mix of SSCP phones and one 7821 SIP phone. The SCCP phones are registered and working just fine. The SIP phone pulls DHCP but never registers. A "debug tftp events" on the CME reveals no TFTP traffic occurring between the CME and the 7821. I'm not sure what I have done wrong but I compared the configs on a CME that has registered 7821s to mine and can find no discrepancies other than the fact that on my CME, under Voice Register Global, there is no "auto-registration" option available. I am hoping that one of you may be able to provide some insight. 

Thank you for any assistance you may be able to provide!


NOTE: Option 150 in the scope configured for the phones DOES point to the CME and IS reachable from the subnet containing the SIP phone. 




tftp-server flash:Phones/SIP/sip78xx.12-0-1-11.loads alias sip78xx.12-0-1-11.loads
tftp-server flash:Phones/SIP/sboot78xx.12-0-1-11.sbn
tftp-server flash:Phones/SIP/rootfs78xx.12-0-1-11.sbn
tftp-server flash:Phones/SIP/kern78xx.12-0-1-11.sbn


Directory of flash0:/Phones/SIP/

40 -rw- 2506830 Aug 1 2019 11:11:08 +02:00 kern2.78xx.12-0-1-11.sbn
41 -rw- 3091584 Aug 1 2019 11:11:20 +02:00 kern78xx.12-0-1-11.sbn
42 -rw- 43778388 Aug 1 2019 11:12:42 +02:00 rootfs2.78xx.12-0-1-11.sbn
43 -rw- 41812304 Aug 1 2019 11:14:04 +02:00 rootfs78xx.12-0-1-11.sbn
44 -rw- 596464 Aug 1 2019 11:15:04 +02:00 sboot2.78xx.12-0-1-11.sbn
45 -rw- 370284 Aug 1 2019 11:15:20 +02:00 sboot78xx.12-0-1-11.sbn
46 -rw- 1308 Aug 1 2019 11:17:56 +02:00 sip78xx.12-0-1-11.loads


voice service voip
no ip address trusted authenticate
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
no supplementary-service sip handle-replaces
fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none
registrar server expires max 1200 min 300
voice register global
mode cme
source-address port 5060
max-dn 600
max-pool 265
load 7821 sip78xx.12-0-1-11
authenticate register
timezone 28
tftp-path flash:
create profile sync 0072375340483511
voice register dn 1
number 1001
allow watch
label TEST
voice register pool 1
busy-trigger-per-button 2
id mac 00AA.6E0E.0F74
number 1 dn 1
codec g711ulaw


6 Replies 6

Vaijanath Sonvane
VIP Alumni
VIP Alumni


Please try below additional configuration:

voice register pool 1
 type 7821
 username 1001 password 1001
voice register global
authenticate realm all
create profile


Please rate helpful posts and if applicable mark "Accept as a Solution".
Thanks, Vaijanath S.

Thanks for the suggestions! I tried them but the phone still would not register. I have upgraded the CME to v12.0, added a newer version of the firmware load (12.5), and now I can see registration attempts on the CME under the "show voice register statistics" command but the phone still will not register. When I hard reset the phone the message "Reg Send Failure : REGISTER" appears for a short time on the screen and then the phone goes into the registration loop. The phone is getting DHCP but under the "Active Server" section, where I assume I should see the IP of the TFTP server I see nothing. 


I really have no idea what to do at this point. 

If phone is not getting TFTP IP Address then check option 150 configuration under DHCP scope for of this phone. I know you mentioned in your original post that the option 150 is configured but verify it again. If it doesn't work try setting TFTP and other network parameters manually on the phone and see if it works. 



Please rate helpful posts and if applicable mark "Accept as a Solution".
Thanks, Vaijanath S.


 Verified the Option 150 IP is correct. I will try manually configuring the phone and let you know what happens. 

How did you resolve this registration issue

Level 1
Level 1

any updates on the issue. facing the same with a 7811