Ata 191 Startup Process; Chapter - Cisco ATA 191 Administration Manual

Prepare to Install the ATA 191 on Your Network
If the device security mode in the configuration file is set to Authenticated and the CTL file on the ATA 191
has a valid certificate for Cisco Unified Communications Manager, the phone establishes a TLS connection
to Cisco Unified Communications Manager. Otherwise, the ATA 191 establishes a TCP/UDP connection.
You can go to Voice > Line > SIP Settings on the ATA 191 web GUI, where the SIP Transport should
correspond to the transport type in the Phone Security Profile in Cisco Unified Communications Manager.
If you configure security-related settings in Cisco Unified Communications Manager Administration, the
phone configuration file contains sensitive information. To ensure the privacy of a configuration file, configure
it for encryption. For detailed information, see the "Encrypted Phone Configuration Setup" chapter of the
Security Guide for Cisco Unified Communications Manager at:
unified-communications/unified-communications-manager-callmanager/products-maintenance-guides-list.html.
If the ATA 191 has registered before, the ATA 191 accesses the configuration file named
ATA<mac_address>.cnf.xml, where mac_address is the MAC address of the phone. If the ATA 191 cannot
access that configuration file, then it accesses the default XMLDefault.cnf.xml configuration file.
If autoregistration is not enabled and you did not add the ATA 191 to the Cisco Unified Communications
Manager database, the ATA 191 does not attempt to register with Cisco Unified Communications Manager.
For the ATA 191, the TFTP server generates these SIP configuration files:
• SIP IP Phone:
The filenames are derived from the MAC Address in the Phone Configuration window of Cisco Unified
Communications Manager Administration. The MAC address uniquely identifies the phone. For more
information, see the Administration Guide for Cisco Unified Communications Manager and IM and Presence
Service.
For more information about how the phone interacts with the TFTP server, see the "Configure TFTP Servers"
chapter of the System Configuration Guide for Cisco Unified Communications Manager at:
www.cisco.com/c/en/us/support/unified-communications/unified-communications-manager-callmanager/
products-installation-and-configuration-guides-list.html

ATA 191 Startup Process

When the ATA 191 connects to the VoIP network, it goes through a standard startup process. Depending on
your specific network configuration, not all these process steps may occur on your ATA.
Table 3: ATA 191 Startup Process
Task
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◦For unsigned and unencrypted files—ATA<mac>.cnf.xml
◦For signed files—ATA<mac>.cnf.xml.sgn
◦For signed and encrypted files—ATA<mac>.cnf.xml.enc.sgn
Obtaining power.
The ATA 191 uses external power.
Cisco ATA 191 Analog Telephone Adapter Administration Guide for Cisco Unified Communications Manager

ATA 191 Startup Process

https://www.cisco.com/c/en/us/support/
Related Topics
See Power Guidelines, on page 16
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