xml file, the phone also sends a version request and checks the current phone load version. The phone establishes communication with the Cisco CallManager that is highest in the prioritized list and sends a registration request.The configuration information contains a prioritized list of up to three Cisco CallManager servers, the device pool to which the phone belongs, and information about the phone load version if the release is 3.1. In release 3.1, the configuration file is an. In Cisco CallManager 3.0, this configuration information is in the form of a. Once the phone has the TFTP address, the phone requests its configuration information from the TFTP server.Option 66 (first IP address or Domain Name System name) The DHCP response returns the address of the TFTP server in one of these forms:.The phone requests an IP address from the DHCP service.The registration of a Cisco IP Phone with Cisco CallManager is a four-step process. What does it take to get my Cisco 7960, 7940, or 7910 IP Phone to register with Cisco CallManager?Ī. This document answers some of the most frequently asked questions (FAQ) about Cisco IP Phones.
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