This is an actual ticket escalated to our team.
User reported that his Cisco IP Phone automatically dials a number once he picks up the handset of the phone.
HW/SW Versions:
- Cisco IP Phone 7942
- SCCP42.9-2-3S
- CUCM 7.1 (7.1.5.33900-10)
- Same behavior is observed when pressing the speaker button;
- Same behavior is observed when pressing the headset button;
- Only one number is being called consistently;
- IP Phone is registered correctly in CUCM;
- Resetting the phone has stopped the auto-dialling.
Root Cause:
After some research, we found the bug documenting this behavior:
CSCtz29414 - 7942/7962 - Call History is Auto-Dialed When Pressing Speaker Button
Symptom:
When a 7942/62 phone is populated with call history records (e.g. received/placed/missed calls), the endpoint will auto-dial the number contained in its call history when the speaker button is pressed.
Conditions:
IP Phone Call History contains Received/Placed/Missed Phone number record prior to pressing speaker button to go off-hook. Phone will continue to auto-dial the number listed in Call History once error condition is experienced.
Workaround:
Reset IP Phone to clear error condition
1st Found-In:
9.2(3)
Fixed-In:
9.2(3)ES7
9.3(1)TH2.2
9.2(3)MN1.22
Workaround:
As per the bug above, reset the phone
Permanent Fix:
Upgrade the phone firmware.
