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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)
OL-3141-01
Chapter 3 Configuring the Cisco ATA for SCCP
Configuring the Cisco ATA Using a TFTP Server
• cfgfmt -eSecret -tpTagFile input-text-file output-binary-file
If the Cisco ATA EncryptKey parameter has the value of 0 or is not included in input-text-file, the
Secret is used to encrypt the output-binary-file. If input-text-file sets the Cisco ATA EncryptKey
parameter to a nonzero value and the -e option is used, then output-binary-file is encrypted with the
EncryptKey parameter set in input-text-file and Secret is ignored.
• cfgfmt -E -tpTagFile input-text-file output-binary-file
The -E (uppercase) option means that any value specified for the Cisco ATA EncryptKey parameter
in input-text-file is ignored. However, because Secret is not specified in this example,
output-binary-file is not encrypted. Nevertheless, the EncryptKey parameter and its value, if
specified in input-file-text, will be included in output-binary-file for possible encryption at a later
time.
• cfgfmt -E -eSecret -tpTagFile input-text-file output-binary-file
The -E (uppercase) option means that any value specified for the Cisco ATA EncryptKey parameter
in input-text-file is ignored and the output-binary-file is encrypted with the Secret key. However, the
EncryptKey parameter and its value, if specified in input-text-file, will be included in
output-binary-file.
Configuring the Cisco ATA to Obtain its Configuration File from the TFTP Server
This section describes three methods from which to choose how the Cisco ATA contacts the TFTP server
to obtain its configuration file:
• Using a DHCP Server, page 3-15
–
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 TFTP server
• Without Using a DHCP Server, page 3-17
Note In the rare instance where no TFTP server is used, you must manually configure the CA0orCM0
parameter to instruct the Cisco ATA about how to register with Cisco CallManager. For this scenario,
see the “CA0orCM0 and CA1orCM1” section on page 5-9.
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 3-16
• Procedure if DHCP Server is not Under Control of Cisco ATA Administrator, page 3-16
This section also includes the topic:
• Other DHCP Options You Can Set, page 3-17