Chapter 2 Preparing to Install the ATA 187 on Your Network
Providing Power to the ATA 187
Understanding How the ATA 187 Interacts with Cisco Unified Communications Manager
Cisco Unified Communications Manager is an open and
•Firmware for devices
•Authentication and encryption (if configured for the telephony system)
•Configuration and CTL files via the TFTP service
•Phone registration
•Call preservation, so that a media session continues if signaling is lost between the primary Communications Manager and a phone
For information about configuring Cisco Unified Communications Manager to work with the IP devices described in this chapter, see Cisco Unified Communications Manager Administration Guide, Cisco Unified Communications Manager System Guide, and Cisco Unified Communications Manager Security Guide.
Providing Power to the ATA 187
The ATA 187 is powered with external power. External power is provided through a separate power supply.
The following sections provide more information about powering a ATA 187:
•Power Guidelines, page
•Power Outage, page
•Understanding Phone Configuration Files, page
Power Guidelines
The following power type and guideline applies to external power for the ATA 187:
•Power
•
Power Outage
Your accessibility to emergency service through the phone is dependent on the phone being powered. If there is an interruption in the power supply, Service and Emergency Calling Service dialing will not function until power is restored. In the case of a power failure or disruption, you may need to reset or reconfigure equipment before using the Service or Emergency Calling Service dialing.
Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
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