The FXO port only can handle a single call at a time. Hence, when you have an active call through 0/0/0, any subsequent attempts for calls in and out of that port will not work while the first call is still actively using that port.
If you want to sustain more than a single PSTN call at a time, you need to get another FXO circuit to terminate on this device, and add more dial-peers with equal preference to point out the new circuit.
what i have is 2 land lines RJ11 connected to two different ports of CCME.
So i can use each one of them to make seperate calls, i have configured dial peers also for 0/0/1, but when i use any line the other one will give busy signal. what else should i do , also i am thinking to make the other line use button 7 of the phone to take the other line.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.