Checking Network Connectivity

Chapter 6 Troubleshooting and Maintenance

Resolving Startup Problems

–Disconnect a functioning phone from another port and connect it to this network port to verify the port is active.

–Connect the phone that will not start up to a different network port that is known to be good.

–Connect the phone that will not start up directly to the port on the switch, eliminating the patch panel connection in the office.

2.Verify that the phone is receiving power:

–If you are using external power, verify that the electrical outlet is functional.

–If you are using the external power supply, switch with a unit that you know to be functional.

3.If the phone still does not start up properly, perform a factory reset of the phone.

Symptom: The ATA 187 Does Not Register with Cisco Unified Communications Manager

If the phone proceeds past the first stage of the startup process (LED buttons flashing on and off) but continues to cycle through the messages, the phone is not starting up properly. The phone cannot successfully start up unless it is connected to the Ethernet network and it has registered with a Cisco Unified Communications Manager server.

These sections can assist you in determining the reason the phone is unable to start up properly:

•Registering the Phone with Cisco Unified Communications Manager, page 6-4

•Checking Network Connectivity, page 6-2

•Verifying TFTP Server Settings, page 6-2

•Verifying DNS Settings, page 6-3

•Verifying Cisco Unified Communications Manager Settings, page 6-3

•Cisco Unified Communications Manager and TFTP Services Are Not Running, page 6-3

•Creating a New Configuration File, page 6-3

•Registering the Phone with Cisco Unified Communications Manager, page 6-4

If the network is down between the phone and the TFTP server or Cisco Unified Communications Manager, the phone cannot start up properly. Ensure that the network is currently running.

Verifying TFTP Server Settings

You can determine the IP address of the TFTP server used by the ATA 187 by entering http://x.x.x.x where x.x.x.x is the IP address of the ATA 187.

If you have assigned a static IP address to the phone, you must manually enter a setting for the TFTP Server 1 option. See “Accessing the IVR and Configuring Your Phone Setting” section on page 8-1.

If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check the IP address configured in Option 150.

You can also enable the phone to use an alternate TFTP server. Such a setting is particularly useful if the phone was recently moved from one location to another. See “Accessing the IVR and Configuring Your Phone Setting” section on page 8-1for instructions.

Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0

6-2	OL-21035-01

OL-21035-01 specifications

Cisco Systems OL-21035-01 refers to a specific product or course pertaining to networking technologies offered by Cisco. While details of OL-21035-01 may allude to various learning modules, let’s explore its primary features, technologies, and characteristics that highlight the significance of Cisco’s offerings in the IT landscape.

At its core, OL-21035-01 encapsulates essential networking principles and is likely part of Cisco's extensive training portfolio focused on solidifying foundational knowledge in networking. One prominent feature includes a comprehensive curriculum that covers advanced routing and switching concepts. This ensures participants are well-equipped to manage and maintain modern network infrastructures, which are critical in today’s connectivity-driven world.

The learning materials may also leverage dynamic teaching methodologies, engaging participants through simulations and practical labs. This experiential learning approach allows individuals to demonstrate proficiency in configuring Cisco routers and switches, troubleshooting network problems, and implementing strategies for optimizing performance.

In terms of technologies, OL-21035-01 aligns closely with modern networking trends such as Software-Defined Networking (SDN), Internet of Things (IoT), and cloud computing. Understanding these technologies is essential as organizations increasingly rely on scalable, flexible, and intelligent network solutions. The program may also delve into Cisco's proprietary technologies like Cisco IOS, which is fundamental for managing network devices.

Another characteristic of OL-21035-01 is its alignment with industry standards and best practices. This ensures that professionals undergoing training are prepared for real-world scenarios they will face while managing enterprise-level networks. Cisco certifications, often obtainable through these courses, are recognized globally and can significantly enhance career prospects.

Additionally, OL-21035-01 stresses the importance of security in networking. Participants learn about robust security protocols, firewall configurations, and strategies to protect networks against cyber threats, ensuring that they remain resilient in the face of growing security challenges.

Lastly, Cisco’s emphasis on continuous learning is mirrored in the iterative nature of its offerings, encouraging IT professionals to stay updated with the latest advancements in technology. Consequently, OL-21035-01 not only serves as a stepping stone in one’s career but also fosters a culture of lifelong learning, vital for navigating the ever-evolving tech landscape.

In summary, OL-21035-01 embodies a holistic approach to networking education, focusing on critical skills development, contemporary technologies, and a robust understanding of security measures necessary for thriving in the IT sector.