Power
113
UNINTERRUPTIBLE POWER SUPPLY (UPS)
Use uninterruptible power supplies when phones, the associated controllers, PC-based
consoles, and the LAN infrastructure need to continue to operate during a power failure. UPSs
can range from simple local battery units to larger central installations that include backup
generators. Consider the following factors to determine the type of unit to use:
•
The power to be drawn by attached units
•
The power output of the UPS, and its efficiency with battery capability
•
The time the UPS must supply power
•
The size of the unit.
Worked Example
Consider a small installation with a LAN switch and some powered phones. The LAN switch
draws 100 W and 16 attached phones draw 8 W each. The UPS has a 12 V battery of 55 AH
and runs at 70% efficiency. How long can this combination be powered?
•
The output power available is 462 VAH (volt-amperes hour) (55 x 12 x 70%).
•
The consumption is 228 VA (100 W + 16 x 8 W).
•
The time available is 2 hours or 462 VAH / 228 VA.
America Power Conversion (APC) is a company that designs and sells UPS systems. Some
useful calculations can also be found at the APC web site:
http://www.apc.com/tools/ups_selector/index.cfm
Mitel products are listed under “VoIP Solutions.” (Although information appeared correct when
this publication was written, Mitel cannot take responsibility for incorrect information entered
or supplied from this tool.)
Notes:
1.
If VoIP service must be operational during a power failure, each of the network
components must also be on the UPS.
2.
The System Engineering Tool will estimate the amount of power used by each of
the cabinets in the system configuration when running the existing traffic. The
estimate does not include the power for other network equipment (L2 switches, and
so forth).
Note:
Volt-Amperes (VA) is equivalent to Watts (W) if the Power Factor Correction
(PFC) of the power supply in question has a PFC value of close to 1. Most data
switches on the market today will have a PFC value close to 1.
Summary of Contents for MiVOICE BUSINESS
Page 1: ...Mitel MiVoice Business RELEASE 7 2 ENGINEERING GUIDELINES ...
Page 15: ...Chapter 1 ABOUT THIS DOCUMENT ...
Page 16: ......
Page 22: ...Engineering Guidelines 8 ...
Page 23: ...Chapter 2 SYSTEM OVERVIEW ...
Page 24: ......
Page 28: ...Engineering Guidelines 14 ...
Page 29: ...Chapter 3 TYPICAL CONFIGURATIONS ...
Page 30: ......
Page 73: ...Chapter 4 PHONES AND VOICE APPLICATIONS ...
Page 74: ......
Page 95: ...Phones and Voice Applications 81 Figure 9 ICP Connection Paths and Limitations ...
Page 100: ...Engineering Guidelines 86 ...
Page 101: ...Chapter 5 POWER ...
Page 102: ......
Page 128: ...Engineering Guidelines 114 ...
Page 129: ...Chapter 6 PERFORMANCE ...
Page 130: ......
Page 135: ...Chapter 7 APPLICATIONS ...
Page 136: ......
Page 142: ...Engineering Guidelines 128 ...
Page 143: ...Chapter 8 EMERGENCY SERVICES ...
Page 144: ......
Page 151: ...Chapter 9 IP NETWORKING ...
Page 152: ......
Page 167: ...Chapter 10 LICENSING ...
Page 168: ......
Page 183: ...Chapter 11 BANDWIDTH CODECS AND COMPRESSION ...
Page 184: ......
Page 209: ...Chapter 12 NETWORK CONFIGURATION CONCEPTS ...
Page 210: ......
Page 244: ...Engineering Guidelines 230 ...
Page 245: ...Chapter 13 NETWORK CONFIGURATION SPECIFICS ...
Page 246: ......
Page 309: ...Appendix A CAT 3 WIRING ...
Page 310: ......
Page 315: ...CAT 3 Wiring 301 Figure 55 CX MX MXe AX and LX Minimum Cable Standard ...
Page 316: ...Engineering Guidelines 302 ...
Page 317: ...Appendix B INSTALLATION EXAMPLES ...
Page 318: ......
Page 335: ...Appendix C LLDP AND LLDP MED CONFIGURATION EXAMPLES ...
Page 336: ......
Page 347: ...Appendix D VOIP AND VLANS ...
Page 348: ......
Page 353: ...Appendix E VOIP SECURITY ...
Page 354: ......
Page 381: ... ...