Phone and Directory Number Configuration

Cisco Directory Number Configuration

MAC Address of IP Phone

© 2005 Cisco Systems, Inc. All rights re

MAC Address of IP Phone

© 2005 Cisco Systems, Inc. All rights re

Manually adding new IP Phones to the network is often tedious, but it can constitute a large part of day-to-day voice network management. The Bulk Administration Tool (BAT) allows you to add a large number of IP Phones to the Cisco CallManager database at once, but BAT is not appropriate for adding or modifying a single IP Phone for a new employee.

Cisco CallManager uses the IP Phone MAC address to track the phone in the voice network. Cisco CallManager ties all IP Phone configuration settings to the IP Phone MAC address. Before you can perform any configuration on a Cisco IP Phone through Cisco CallManager, you must find the MAC address of that IP Phone. Use the following guidelines to locate a MAC address:

■ You can find the MAC address in the text and Universal Product Code (UPC) form, which is imprinted on the shipping box for the IP Phone. Some administrators use bar code scanners to simplify the process of adding multiple IP Phones.

■ You can also find the MAC address in the text and UPC form on the back of the IP Phone, on a sticker near the bottom.

■ If you boot the IP Phone, you can press the Settings button on the face of the phone. Use the arrow keys to navigate, and choose Network Configuration. The MAC address will be displayed on line 3 of the network configuration.

You can continue the Cisco IP Phone configuration on the Cisco CallManager configuration after you have the MAC address of the IP Phone, as follows:

Step 1 In Cisco CallManager Administration, choose Device > Phone to open the Find and List Phones window.

Step 2 Choose Add a New Phone in the upper-right corner of the window.

Step 3 Choose the model of the IP Phone from the drop-down menu, and click Next.

Step 4 At a minimum, you must configure the MAC Address and Device Pool fields; then click Insert.

Step 5 Cisco CallManager prompts you to add a DN for line 1; then click OK.

Step 6 When the Directory Number Configuration window appears, enter the DN of the IP Phone in the appropriate field, and click Insert.

Configuring IP Phone Auto-Registration

This topic describes how to configure Cisco CallManager for auto-registering Cisco IP Phones.

This topic describes how to configure Cisco CallManager for auto-registering Cisco IP Phones.

Auto Registration Cucm

Auto-registration allows Cisco CallManager to issue extension numbers to new IP Phones, which is similar to the way in which the Dynamic Host Control Protocol (DHCP) server issues IP addresses. When a new IP Phone boots and attempts to register with Cisco CallManager for the first time, Cisco CallManager issues an extension number from a configured range. After Cisco CallManager issues the extension, it records the extension number to the MAC address mapping in the Microsoft Structured Query Language (SQL) database.

Although auto-registration simplifies the process of deploying a new IP telephony network, it is an option that is available only in some new IP telephony deployments. Because administrators deploy most IP telephony networks as a migration from a PBX environment, users have existing telephone extensions. These existing telephone extensions typically map to Direct Inward Dial (DID) numbers from the Public Switched Telephone Network (PSTN) and cannot change. Therefore, these IP telephony deployments usually use manual configuration rather than auto-registration.

You should carefully evaluate auto-registration before implementing it because its use can pose a security risk to the network. Auto-registration allows anyone with physical assess to the voice network to connect an IP phone and use it, whether authorized or not. For this reason, many organizations, as part of their security policy, disable the use of auto-registration or use auto-registration in a secure staging environment for initial Cisco CallManager configuration.

Complete these steps to configure the Cisco CallManager server to support auto-registration:

Step 1 From Cisco CallManager Administration, choose System > Cisco CallManager.

Step 2 From the list of Cisco CallManager servers, select the server that you want to support auto-registration.

Step 3 Under the Auto-Registration Information Configuration section, enter the appropriate DN range in the Starting and Ending Directory Number fields.

Step 4 Ensure that the Auto-Registration Disabled on this Cisco CallManager check box is unchecked.

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