![]() ![]() ![]() Check the services of TFTP and other mandatory services on the Call Manager (CUCM).Check the address of the TFTP server in the DHCP server.If the IP phone is still in registering mode, then you can follow these steps. After erasing the network settings, the phone will reset then it will start working. Click on ITL and CTL and select it and press (**#) and erase the ITL and CTL.ģ. For erasing the previous configuration of the ITC and CTL file in the IP phone please follow these steps:ġ.Click on the Setting button and go to security settings and click on ITL and CTL file.Ģ. If TFTP services are working fine then next, we will erase the ITL and CTL files in the IP phone because it takes the previous configuration of Call Manager. If the IP phone is stuck in registering mode, then it means it is not communicating with the Call Manager so we will check the TFTP server. If IP of IP helper-address should be correct if DHCP is Call Manager ( CUCM) The address of the default gateway should be correct. There can many possibilities come such as:Ĥ. Many times, it could be possible VLAN ID incorrect so follow the IP phone boot-up process. If an IP phone is stuck in configuration mode then in most case it needs an IP address, but if IP phone is not able to get an IP address from DHCP server you can provide manual IP to the phone and you will have to provide manual IP subnet mask as well as default gateway and address of TFTP server. ![]() ![]() IP phone registers with Cisco Call Manager. If all the information is correct IP phone will get a configuration file from TFTPĥ. Now the phone needs an IP address so the phone sends a request for DHCP server for getting IP information and TFTP server addressĤ. After the power, we need to check the VLAN of the IP phone if it is correct or not.ģ. First of all, check the power of the IP phone.Ģ. Follow The Five Steps Of The IP Phone Boot-Up Processġ. IP telephone ( Internet Protocol telephony) is a term used to describe technologies that use a variety of protocols to exchange voice, fax, and other forms of information, traditionally carried over the Public Switched Telephone Network (PSTN). ![]()
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