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Power Protection and Environmental Condition
This section looks at power and environment to help ensure that the organization has a power protection strategy for infrastructure components that support IP telephony. The organization should also perform environmental planning to ensure devices are properly environmentally conditioned for temperature and humidity. The equipment should also be located in physically secure locations, accessible only to networking staff.
Power Protection
Table B-30 provides a list of questions that you should ask customer to understand the current power protection strategy implemented in the network.
| No. | Question | Answer |
|---|---|---|
| 1 | Are core and distribution layer devices that serve multiple buildings or sites power protected with UPS and generator backup? |  Yes No |
| 2 | Are access switches backed up with UPS or a generator where power-protected network access or IP telephony is required? | Yes No |
| 3 | Does the organization use network components that support redundant power supplies? | Yes No |
| 4 | Does the organization perform periodic maintenance on UPS and generator systems to ensure system availability? | Yes No |
Notes/Comments
When you deploy IPT and use an inline power method to deliver the power to IP Phones, delivering uninterruptible power is necessary to achieve high availability. It is especially important for the access layer switches to include redundant power supplies. Based on your observations collected from Table B-30, provide your recommendations in this section.
Environmental Condition
This section examines the processes followed in the organization to monitor and maintain the stable environmental condition for various components to function properly. Table B-31 provides a list of questions you should ask the customer to understand the current measures that are implemented for environmental conditioning.
| No. | Question | Answer |
|---|---|---|
| 1 | Does the organization investigate heat dissipation, temperature, and humidity information for new product implementations? | Yes No |
| 2 | Does the organization provide uninterrupted ventilation and cooling to network devices to maintain a consistent operating temperature and environment? | Yes No |
| 3 | Does the organization use environmental monitoring systems for critical equipment locations? | Yes No |
| 4 | Does the server room where you are planning to house the IPT servers, switches, and gateways have enough rack space? | Yes No |
| 5 | Do you have adequate power outlets to support the additional devices? | Yes No |
| 6 | What is the current capacity of the UPS system? | Capacity_______ |
| 7 | Can the existing UPS system handle the additional load to support the new IPT servers, gateways, and switches? | Yes No |
Notes/Comments
Based on the answers to the questions in Table B-31, you can provide the recommendations to the customer on the importance of constant checking of environmental conditions for power backup systems to ensure uninterruptible functioning of the IPT system.
Power Calculations
As part of the infrastructure analysis, you need to collect the information as per Table B-5 to get hardware information on the switches that are deployed in the network.)
| Switch Name, Location, Product Family, Chassis Type | Line Cards Installed | Input Voltage | Cisco IP Phone Model | Quantity | Recommendations from Cisco Power Calculator |
|---|---|---|---|---|---|
| 7960G7970G7940G | |||||
| 7960G7970G7940G | |||||
| 7960G7970G7940G |
Notes/Comments
You can input the information collected in Table B-32 in the Cisco Power Calculator (CPC), available on Cisco.com at http://tools.cisco.com/cpc/launch.jsp, to complete the power calculations.In Table B-32, in the "Recommendations from Cisco Power Calculator" column, you can put the output of the CPC, such as whether the system can support the specified number of IP phones, whether the system requires additional power supply, etc.
