Power Guidelines; Power Outage; Phone Configuration Files; Chapter, - Cisco ATA 191 Administration Manual

Analog telephone adapter
Hide thumbs Also See for ATA 191:
Table of Contents

Advertisement

Power Guidelines

Communications Manager manages the components of the IP telephony system: the phones, the access
gateways, and the resources necessary for features such as call conferencing and route planning. Cisco Unified
Communications Manager also provides:
• 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
For information about configuring Cisco Unified Communications Manager to work with the IP devices
described in this chapter, see Administration Guide for Cisco Unified Communications Manager and IM and
Presence Service, System Configuration Guide for Cisco Unified Communications Manager, and Security
Guide for Cisco Unified Communications Manager.

Power Guidelines

The ATA is powered with external power. External power is provided through a separate power supply.
The following power type and guideline applies to external power for the ATA:
• Power Type—External power (provided through the Universal AC external power supply).
• Guidelines—The ATA uses the Universal AC power supply 100/240V.
Related Topics
Electrical Specifications, on page 56

Power Outage

Your accessibility to emergency service through the phone depends 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.

Phone Configuration Files

Configuration files for a phone are stored on the TFTP server and define parameters for connecting to Cisco
Unified Communications Manager. When you make a change in Cisco Unified Communications Manager
that requires the ATA 191 line to be reset, the phone configuration file is automatically updated. If a system
reset or restart is required, both lines must reset or restart at the same time.
Configuration files also contain information about which image load the ATA 191 should be running. If this
image load differs from the one currently loaded on an ATA 191, the phone contacts the TFTP server to
request the required load files. These files are digitally signed to ensure the authenticity of the file source.
Cisco ATA 191 Analog Telephone Adapter Administration Guide for Cisco Unified Communications Manager
16
Communications Manager
Prepare to Install the ATA 191 on Your Network

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents