Hello! Now I want to share with you some tips on configuring LCS and its client Office Communicator to originate VoIp calls to a Cisco SCCP IP Phone or conventional PSTN phones through a Cisco Call Manager 4.1 SR3.
Many companies setup Cisco Telephony over IP environments and don’t know they can use Office Communicator and LCS 2005 to place calls to the VoIp and PSTN clouds just using the already in-place Cisco infrastructure.
I mean, the companies do not need a special gateway just to make VoIP and PSTN calls from Office Communicator using their in-place Cisco Call Manager 4.1.
In fact, they still need a gateway if the goal is to make signaling (3PCC/CSTA) integration.
Actually I have a customer using Cisco Call Manager 4.1 to place VoIP calls to all their IP and PSTN phones using the integration already made between the CCM 4.1 and the corporative PBX.
Before to start with the configuration steps I’d like to list what will work after the setup:
What will not work?
First let’s check the network topology.
Now the steps.
Phone URI: Checked
Call Routing Information
a. Significant Digits: All
b. Connected Line ID Presentation: Default
c. Connected Name Presentation: Default
You also need to setup a registry key (manually or using Group Policies) to enable the PC2Phone functionality on your Office Communicator.
On the COMMUNICATOR.ADM template this configuration is named "Enable Computer to Phone Calls".
Now go to the Office Communicator and just type the phone number on the Find box, click on Call to place Voip or PSTN calls through the CCM 4.1. You will also notice that the combo box on the side of your contacts is now enabled.
This posting is provided "AS IS" with no warranties, and confers no rights.