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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
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Chapter3 Configuring the Cisco ATA for H.323
Configuring the Cisco ATA Using a TFTP Server
Procedure
Step 1 Using the voice configuration menu, set the parameter TftpURL to the IP address or URL of the TFTP
server. For more information on setting the TftpURL parameter, see the “TftpURL” section on page 5-5.
For information about using the CiscoATA voice configuration menu, see the “Voice Configuration
Menu” section on page 3-15.
Note If you are not using a DHCP server to provide the TFTP server location, you must manually
configure the TftfURL. You can do this by using the voice configuration menu without first
obtaining network connectivity for the Cisco ATA. If you want to configure this value using the
Web configuration page, you first must obtain network connectivity by using the voice
configuration menu to statically configure IP address information (see the “Voice Configuration
Menu” section on page 3-15).
Step 2 Use the default value of 1 for the Cisco ATA parameter DHCP.
Step 3 Use the default value of 1 for the Cisco ATA parameter UseTftp.
This completes the parameter settings you need to configure for this procedure. The Cisco ATA will
contact the manually configured TFTP server that contains the Cisco ATA configuration file.

Other DHCP Options You Can Set

The following parameters can also be configured with DHCP:
Boot file name of DHCP header—The ata<macaddress> binary CiscoATA configuration file,
which can have a maximum of 31 characters and can be any name with printable ASCII characters
Client PC address
DHCP option 1—Client Subnet Mask
DHCP option 3—Routers on the client’s subnet
DHCP option 6—One or two Domain Name servers
DHCP option 42—One or two Network Time Protocol servers
DHCP option 43—Set this option to identify the protocol (for example, H.323)
DHCP Option 60 (DHCP_VENDOR_CLASS_ID)—Use this parameter to identify the type of
Cisco ATA box (ATA186 or ATA 188 ).
Without Using a DHCP Server
Use the following procedure if you are not using a DHCP server in your environment but are still using
a TFTP server to obtain the Cisco ATA configuration file:
Procedure
Step 1 Set the DHCP parameter to 0.
Step 2 Set the UseTFTP parameter to 1.
Step 3 Set the CiscoATA parameter TftpURL to the IP address or URL of the TFTP server. For more
information on setting the TftpURL parameter, see the “TftpURL” section on page 5-5.