I have three questions in call manager 4.2 could please help me.
1- How can I call amultiple users by one DN in the same time.
2- How can I secure the key pad of the IP phones.
3- How Can I download Cisco VT Advantage.
1. You can use a hunt group and configure the line group for the broadcast distribution algorithm. See the following link. You could also use a shared line on multiple phones.
2. One option is to use Extension Mobility requiring each user to login to the phone to make calls. The logout profile for the phone could have no DNs assigned essentially disabling the phone.
3. If you have a CCO login, you can download VTA from here:
Hope this helps. If so, please rate the post.