Power Outage; Additional Information About Power - Cisco 3905 Administration Manual

Power Outage

Power Type
PoE power: Provided by a
switch through the Ethernet
cable attached to the phone.
External power: Provided
through inline power patch
panel WS-PWR-PANEL
Power Outage
Your access to emergency service through the phone requires the phone to receive power. If an interruption
in the power supply occurs, Service and Emergency Calling Service dialing do not function until power is
restored. In the case of a power failure or disruption, you may need to reset or reconfigure equipment before
you can use the Service or Emergency Calling Service dialing.

Additional Information About Power

The documents in the following table provide more information on the following topics:
• Cisco switches that work with Cisco Unified IP Phones
• Cisco IOS releases that support bidirectional power negotiation
• Other requirements and restrictions about power
Document topics
Cisco Unified IP Phone Power Injector
PoE Solutions
Cisco Catalyst Switches
Integrated Service Routers
Cisco IOS Software
Cisco Unified SIP Phone 3905 Administration Guide for Cisco Unified Communications Manager 8.6 (SIP)
24
Guidelines
• The Cisco Unified SIP Phone 3905 supports IEEE 802.3af Class 1 power
on signal pairs and spare pairs.
• To ensure uninterruptible operation of the phone, make sure that the
switch has a backup power supply.
• Make sure that the CatOS or IOS version running on your switch supports
your intended phone deployment. Refer to the documentation for your
switch for operating system version information.
The inline power patch panel WS-PWR-PANEL is compatible with the Cisco
Unified SIP Phone 3905.
URL
http://www.cisco.com/en/US/products/ps6951/index.html
http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns412/
index.html
http://www.cisco.com/en/US/products/hw/switches/index.html
http://www.cisco.com/en/US/products/hw/routers/index.html
http://www.cisco.com/en/US/products/sw/iosswrel/products_
ios_cisco_ios_software_category_home.html
Cisco Unified IP Phone and Your Network