This was a very interesting scenario I came across for this customer where these two phones were not ringing at all. Any incoming call and they would just flash. No Ringtone.
I confirmed that the phones were working fine few days back but then suddenly started just flashing. One other phone in the same group was working fine. I matched the configuration of all three phones and they were all same. I know that the only way you can change the ring settings from CLI is from the button command.If you are using ‘:’ then that means Ring. Taken from Cisco as follows:
button button-number {separator} dn-tag [,dn-tag…] [button-number{x}overlay-button-number] [button-number…]
: (colon)—Normal ring. For incoming calls on this extension, the phone produces audible ringing, a flashing icon in the phone display, and a flashing red light on the handset. On the Cisco IP Phone 7914 Expansion Module, a flashing yellow light also accompanies incoming calls.
•b—Beep but no ring. Audible ring is suppressed for incoming calls, but call-waiting beeps are allowed. Visible cues are the same as those described for a normal ring.
•c—Call waiting. Provides call waiting for secondary calls to an overlaid ephone-dn. See also the o keyword.
•f—Feature ring. Differentiates incoming calls on a special line from incoming calls on other lines on the phone. The feature-ring cadence is a triple pulse, as opposed to a single pulse for normal internal calls and a double pulse for normal external calls.
First I thought may be they are getting flashing only on shared lines but confirmed it was the same flashing if someone dial their primary number as well. Configuration of ephone-dn and ephone was similar to this:
ephone-dn 17 octo-line
number 2920
pickup-group 1
label Nicky Brian (2920)
name Nicky Brian
call-forward busy 8005
call-forward noan 8005 timeout 10
corlist incoming User-international
!
ephone 20
mac-address 0023.3XXX.XXXX
ephone-template 1
username “nbri” password welcome
type 7965 addon 1 7916-24
keep-conference endcall
button 1:17 2:187 3s186 4:180
no button 5:182 6:185 7s1 8s2
button 5:181 6:185 7s1 8s2
button 9s3 10s4 11s6 12s8
button 13s10 14s11 15s13 16s14
button 18s28 19s15 20s20 21s37
button 22s27 23s12 24s7 25s36
button 26s29 27s9
!
!
This doesn’t tell me why phones are not ringing. Configuration looks absolutely correct.
Then I decided to check the ephone configuration by running the command ‘sh ephone‘. This customer have quite a few phones with expansion modules so I had to be careful I am looking at right ephones.
This is what I found from one of the ephone which was just flashing.
ephone-20[19] Mac:0023.XXXX.XXXX TCP socket:[13] activeLine:0 whisperLine:0 REGISTERED in SCCP ver 17/12 max_streams=5
mediaActive:0 whisper_mediaActive:0 startMedia:0 offhook:0 ringing:0 reset:0 reset_sent:0 paging 0 debug:0 caps:9 privacy:0
IP:10.60.6.X 12386 7965 sub=1 keepalive 3350 max_line 30 available_line 30 DnD
Phone reports 30 Available Lines
button 1: dn 17 number 2920 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE shared
button 2: dn 187 number 8802 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE shared
button 3: dn 186 number 8803 CH1 IDLE mwi silent-ring shared
button 4: dn 180 number 8005 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE shared
button 5: dn 181 number 8806 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE shared
button 6: dn 185 number 8804 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE shared
button 7: dn 1 number 2904 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE silent-ring shared
button 8: dn 2 number 2905 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE mwi silent-ring shared
button 9: dn 3 number 2906 CH1 CONNECTED CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE silent-ring shared
button 10: dn 4 number 2907 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE mwi silent-ring shared
button 11: dn 6 number 2909 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE silent-ring shared
button 12: dn 8 number 2911 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE mwi silent-ring shared
button 13: dn 10 number 2913 CH1 IDLE CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6 IDLE CH7 IDLE CH8 IDLE silent-ring shared
button 14: dn 11 number 2914 CH1 CONNECTED CH2 IDLE CH3 IDLE CH4 IDLE CH5 IDLE CH6
Carefully look at the above output and I am sure you will know why it was just flashing and not ringing.
The phone had DND enabled!
This very same thing happened to me today, and this blog was very helpful. Thank you for sharing.