We have several IP phones (Cisco7961) which didn't work since yesterday. Some work but some don't work at all : we cannot pass or receive calls...
We tried to reboot them several times but unsucessfuly.
We made a Ethereal capture and we noticed that during the exchanges of messages between the call Manager and the telephon (SKINNY Protocol), we have a missing message:
[TCP Previous Segment Lost] SelectSoftkeysmessage
For the phones which work, we don't have this lost segment...
Do someone have an idea?
Thanks you by advance for your help
Do you have multiple gateways in your network?