Understanding The Ata 190 Startup Process - Cisco ATA 190 Administration Manual

Understanding the ATA 190 Startup Process

For more information about how the phone interacts with the TFTP server, see the
Communications Manager System
Understanding the ATA 190 Startup Process
When connecting to the VoIP network, the ATA 190 goes through a standard startup process, as described
in Table
on your ATA 190.
Table 2-1 ATA 190 Startup Process
Task Purpose
Obtaining Power.
1.
The ATA 190 uses external power.
2. Loading the Stored Image.
The ATA 190 has non-volatile flash memory in which it
stores firmware images and user-defined preferences. At
startup, the phone runs a bootstrap loader that loads a
phone image stored in flash memory. Using this image, the
phone initializes its software and hardware.
Obtaining an IP Address.
3.
If the ATA 190 is using DHCP to obtain an IP address, the
device queries the DHCP server to obtain one. If you are
not using DHCP in your network, you must assign static IP
addresses to each device locally.
Requesting the CTL file.
4.
The TFTP server stores the CTL file. This file contains the
certificates necessary for establishing a secure connection
between the device and Cisco Unified Communications
Manager.
Cisco ATA 190 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
2-4
2-1. Depending on your specific network configuration, not all of these process steps may occur
Chapter 2
Guide, Cisco TFTP section.
Related Topics
See Providing Power to the ATA 190, page
See the Cisco Unified Communications Manager
Security Guide,
Client.
Preparing to Install the ATA 190 on Your Network
Cisco Unified
Configuring the Cisco CTL
2-2.
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