Chapter 7 Troubleshooting and Maintenance

Resolving Startup Problems

Note

 

• When you remove a phone from the Cisco Unified Communications Manager database, its

 

 

configuration file is deleted from the Cisco Unified Communications Manager TFTP server. The

 

 

phone’s directory number or numbers remain in the Cisco Unified Communications Manager

 

 

database. They are called “unassigned DNs” and can be used for other devices. If unassigned DNs

 

 

are not used by other devices, delete them from the Cisco Unified Communications Manager

 

 

database. You can use the Route Plan Report to view and delete unassigned reference numbers.

 

 

Refer to Cisco Unified Communications Manager Administration Guide for more information.

 

 

• Changing the buttons on a phone button template, or assigning a different phone button template to

 

 

a phone, may result in directory numbers that are no longer accessible from the phone. The directory

 

 

numbers are still assigned to the phone in the Cisco Unified Communications Manager database, but

 

 

there is no button on the phone with which calls can be answered. These directory numbers should

 

 

be removed from the phone and deleted if necessary.

 

 

 

Registering the Phone with Cisco Unified Communications Manager

A Cisco Unified IP Phone can register with a Cisco Unified Communications Manager server only if the phone has been added to the server or if auto-registration is enabled and if there is a sufficient number of unit licenses. Review the information and procedures in the “Adding Phones to the Cisco Unified Communications Manager Database” section on page 2-7to ensure that the phone has been added to the Cisco Unified Communications Manager database.

To verify that the phone is in the Cisco Unified Communications Manager database, choose Device > Phone > Find from Cisco Unified Communications Manager Administration to search for the phone based on its MAC Address. For information about determining a MAC address, see the “Using Cisco Unified IP Phones with Different Protocols” section on page 2-11.

If the phone is already in the Cisco Unified Communications Manager database, its configuration file may be damaged. See the “Creating a New Configuration File” section on page 7-4for assistance.

For more information on licensing go to the Licenses for Phones section in the Cisco Unified Communications Manager System Guide

Symptom: Cisco Unified IP Phone Unable to Obtain IP Address

If a phone is unable to obtain an IP address when it starts up, the phone may be not be on the same network or VLAN as the DHCP server, or the switch port to which the phone is connected may be disabled. Make sure that the network or VLAN to which the phone is connected has access to the DHCP server, and make sure that the switch port is enabled.

Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.5 (SCCP and SIP)

 

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7-5

 

 

 

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Cisco Systems 6901 manual Symptom Cisco Unified IP Phone Unable to Obtain IP Address
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6901 specifications

Cisco Systems 6901 is a versatile, compact, and powerful router designed to meet the networking needs of small to medium-sized businesses, as well as enterprise branch offices. This model is part of Cisco's ISR (Integrated Services Router) portfolio, which is known for its capability to integrate multiple services into a single platform, ensuring high efficiency and cost-effectiveness.

One of the main features of the Cisco 6901 is its ability to support advanced routing protocols, including RIP, EIGRP, OSPF, and BGP. This versatility allows for seamless integration into various network architectures, facilitating efficient communication and data transfer across multiple locations. The device is also built to handle high-bandwidth applications, making it an ideal choice for businesses that rely on robust network performance.

In terms of connectivity, Cisco 6901 offers multiple Ethernet ports, supporting both 10/100/1000 Mbps speeds. This ensures that users can connect a variety of devices, ranging from office computers to network printers, all while maintaining optimal network performance. Additionally, the router supports both LAN and WAN interfaces, providing flexibility in deployment options.

Security is a crucial aspect of networking, and the Cisco 6901 does not disappoint in this regard. It comes equipped with advanced security features, including firewall capabilities, intrusion prevention, and VPN support. These features ensure that sensitive business data is protected from unauthorized access, while also providing secure remote access for employees.

Another essential characteristic of the Cisco 6901 is its support for various multimedia applications. The router comes with Quality of Service (QoS) features that prioritize voice, video, and data traffic, ensuring high-quality performance for applications such as VoIP and video conferencing. This is particularly valuable in today's business landscape, where effective communication is critical for success.

The Cisco 6901 is also designed for ease of management and configuration. It features a user-friendly interface that simplifies the setup process, along with comprehensive monitoring tools that enable administrators to keep an eye on network performance and address any issues proactively.

In summary, the Cisco Systems 6901 is a powerful, feature-rich router that combines advanced routing capabilities with robust security measures and multimedia support. Its flexibility, ease of management, and comprehensive service integration make it an excellent choice for businesses seeking to enhance their networking infrastructure. With the Cisco 6901, organizations can achieve efficient communication, secure data exchange, and high-performance network operations, positioning themselves well for future growth.
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