We have 5 of Cisco phones (3x 7941, 1x7961, 1x7960) connected to a cisco 2811 with CME 4.0
A phone (7941) has problems:
1- when a call arrives, phone rings, as I pick up the handset, none conversation occureres, the receiver doesn't listen nothing; the button-line continues blinking as he didn't answer. At the same moment the caller listens as nobody did answer (free tone).
I can answer only switching the answer softkey.
2- As I type any telephone number and press the line button or the speaker's one or I lift the handset, the phone starts a call only with a 0 number, even displayed on the phone screen.
The phone dials correctly when I press dial softkey
Rarely a 7970 IP phone will get into a state where the speaker, headset, handset, or line buttons will not work to take the phone offhook. In this state the only way to go offhook will be to use the softkeys.
This has been seen in various Skinny phone loads up to and including 7.0(2)SR1. It is not dependant on CallManager version.
A simple IP phone reset will recover the phone.
Further Problem Description:
This problem can occur on Cisco IP Phone 7906/7911/7941/7961/7970/7971 independent of phone protocol (SCCP, SIP) and CallManager version.
Firmware 8.0(4)SR1 or later can resolve this problem.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
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