Filter
Top Products
3-18
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)
OL-4803-01
Chapter 3 Configuring the Cisco ATA for MGCP
Configuring the Cisco ATA Using a TFTP Server
Configuring the Cisco ATA to Obtain its Configuration File from the TFTP Server
This section describes three methods for how the Cisco ATA contacts the TFTP server to obtain its
configuration file:
• Using a DHCP Server, page 3-18
–
The Cisco ATA contacts the DHCP server, which provides the IP address of the TFTP server
–
The Cisco ATA uses the DHCP server but the DHCP server does not know about the TFTP
server
• Without Using a DHCP Server, page 3-20
Using a DHCP Server
When using a DHCP server, configuration settings vary depending on whether or not the DHCP server
is under the control of the Cisco ATA system administrator or the service provider. The simplest
configuration is when the DHCP server is under the control of the Cisco ATA administrator, in which
case the DHCP server provides the IP address of the TFTP server. Depending on who controls the DHCP
server, follow the applicable configuration procedure:
• Procedure if DHCP Server is Under Control of Cisco ATA Administrator, page 3-18
• Procedure if DHCP Server is not Under Control of Cisco ATA Administrator, page 3-19
This section also includes the topic:
• Other DHCP Options You Can Set, page 3-19
Note If no DHCP server is found and the Cisco ATA is programmed to find one, the function button
continues to blink.
Procedure if DHCP Server is Under Control of Cisco ATA Administrator
Procedure
Step 1 On the DHCP server, set one of the following two options:
• DHCP option 150 (TFTP server IP address)
• Standard DHCP option 66 (TFTP server name)
If you use DHCP option 150, the Cisco ATA will ignore DHCP option 66. However, if you use DHCP
option 66, you must turn off DHCP option 150 or set its value to 0.
Note You can turn off the DHCP option 150 request by using the Cisco ATA OpFlags parameter (see
the “OpFlags” section on page 5-27).
Step 2 Make sure to use default values for the following Cisco ATA parameters:
• TftpURL=0
• UseTftp=1
• DHCP=1