Specifications

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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for SCCP (version 3.0)
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Chapter 3 Configuring the Cisco ATA for SCCP
Configuring the Cisco ATA Using a TFTP Server
Procedure if DHCP Server is Under Control of Cisco ATA Administrator
Procedure
Step 1 On the DHCP server, set one of the following three options:
• DHCP option 150 (TFTP server IP address and, if applicable, IP address of alternate TFTP server).
• DHCP field siaddr (TFTP server IP address). This field can be used by systems such as
Cisco
Integrated Communications Services (ICS).
• Standard DHCP option 66 (TFTP server name and, if applicable, name of alternate TFTP server).
If you use DHCP option 150, the Cisco ATA will ignore the DHCP siaddr field and DHCP option 66. If
DHCP option 150 is not used, the Cisco
ATA next looks for the DHCP field siaddr. If neither DHCP
option 150 nor the siaddr field are available, the Cisco
ATA looks for DHCP option 66. If you use DHCP
option 66 or the DHCP siaddr field, 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 5-24).
Step 2 Make sure to use default values for the following Cisco ATA paramete r s :
• TftpUrl=0
• AlttftpURL=0
• UseTftp=1
• DHCP=1
• CA0orCM0=0
This completes the parameter settings and DHCP options you need to configure for this procedure. The
Cisco
ATA will contact the DHCP server for the IP address of the TFTP server that contains the
Cisco
ATA configuration file.
Note If you are configuring an alternate TFTP server, you can choose to configure its IP address or URL with
the AlttftpURL parameter (see the
“AlttftpURL” section on page 5-5) instead of with DHCP option 150.
In this situation, the AlttftpURL will not be 0, as indicated in Step 2 of this procedure.