what is ip communicator ? configuration and patch upgradation

what is ip communicator:
Cisco IP Communicator—a software-based application that delivers enhanced telephony support through the PC—is designed to meet diverse customer needs by serving as a supplemental telephone when traveling, a telecommuting device, or as a primary desktop telephone. With Cisco IP Communicator, remote users don't just take their office extension with them; they also enjoy access to the same familiar phone services that they have in the office.
Install and Configure IP Communicator with CallManager
This document outlines the basic steps required to install and configure Cisco IP Communicator with Cisco CallManager through manual setup
Note: Cisco IP Communicator is supported in Cisco CallManager 3.3(4). However, this document focuses on Cisco CallManager 4.x
CHECKLIST::
1>Verify Cisco CallManager Version
In order to set up Cisco IP Communicator in Cisco CallManager 4.x, you must make sure that your CallManager version is no earlier than 4.0(1)sr2.
Go to the main menu window, choose Help > About Cisco CallManager, and then click Details to check your Cisco CallManager version
steps in order to configure Cisco IP Communicator
1.. Go to the main menu window, choose Device > Phone > Add a New Phone, and then select Cisco IP Communicator from the Phone type pull-down menu.
2.. Click Next to get to the Phone Configuration window. Fill out the required details, such as the MAC address of the phone. This address should typically be a fixed network interface card (NIC) where Cisco IP Communicator is installed.
3.. Click Insert. This message appears.
4.. Click OK to get to the Directory Number Configuration window. Fill out the required fields.
5.. Click Add. This message appears.
6.. Click OK.
You have now completed the configuration for Cisco CallManager.

Install Cisco IP Communicator
steps:
A.. Double-click the CiscoIPCommunicatorSetup.exe icon to run the Install Wizard.
B.. Click Next and follow the instructions.
C.. Once the installation is complete, one window appears.
D.. Check the Launch the program check box and click Finish. The Audio Tuning Wizard window appears.
E.. Click Next. The Select Audio Devices window appears..
F.. Choose the appropriate devices from the pull-down lists and click Next. Now you must adjust the listening volume.
G.. Follow the instructions to adjust the listening volume, and then click Next. The Adjust the Microphone Volume window appears.
H.. Follow the instructions to adjust the Microphone Volume, and then click Next. The last window appears.
I.. Click Finish. If your TFTP setup in incorrect, you get this error:
“Unable to reach TFTP server”
J.. Click OK. This window appears automatically
K.. Click Use these TFTP servers and type in the IP address of the Cisco CallManager if you use a TFTP server on the Cisco CallManager. You must also choose the correct Network Adaptor and Device Name, or this error appears.
“please select a network interface to register with cisco call manager”
L.. The next window asks for your username and password.
M.. Enter your username and password and click OK. After a few seconds, the Cisco IP Communicator Launch window appears:
Note: If Cisco IP Communicator is behind a firewall, make sure that the firewall is configured to pass TFTP and RTP traffic using the appropriate port range
Apply sr2 Patch to Cisco CallManager 4.x
If your Cisco CallManager version is not at least 4.0(1)sr2, make sure you download the ciscocm.4-0-1-sr2.exepatch from the Cisco CallManager Version 4.0 Software Download Center ( registered customers only) and apply it to Cisco CallManager. The Apply sr2 Patch to CallManager 4.x section describes this process.

Caution: Application of the sr2 patch to Cisco CallManager should be performed during non-business hours, because this process results in interruption of all CallManager services and a server reboot.
In order to add Cisco IP Communicator as a phone from the device list, you must have Cisco CallManager 4.0(1)sr2. You can apply the sr2 patch directly to 4.0(1) or 4.0(1)sr1 to take you to 4.0(1)sr2.
1. After you download the sr2 patch, copy the file to a temporary directory on your Cisco CallManager server. If you do not have direct access to Cisco CallManager, use Virtual Network Computing (VNC) to connect to CallManager from a client PC that runs VNC Viewer.
2. From the directory to which you copied sr2, double-click the executable file. This window appears
3. Click Next and follow the instructions on the window to complete the steps to update Cisco CallManager to 4.0(1)sr2. After the server is rebooted, verify that the Cisco CallManager version is 4.0(1)sr2. See the Verify Cisco CallManager Version section.
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