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Why does my IP phone fail to auto-register with Cisco CallManager?Ī. In order to use the 7985G IP Phone, you need Cisco Unified CallManager Version 4.1(3)sr2 or later. Which version of Cisco Unified CallManager is required in order to get the Cisco 7985G IP Phone registered?Ī. In order to help resolve issues with the registration of IP phones, refer to Troubleshooting Cisco IP Phone (7910, 7940, 7960, 12 SP, and 30 VIP) Registration Problems with Cisco CallManager 3.x and 4.0. Once the phone has downloaded the new firmware, the phone continues its registration with Cisco CallManager. If the phone needs a new phone load, it aborts the registration process and downloads the current phone load from the TFTP server. 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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