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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
Chapter1 Cisco Analog Telepho ne Adaptor Overview
Software Features
Note If the function button blinks slowly, the Cisco ATA cannot find the DHCP server. Check your
Ethernet connections and make sure the DHCP server is available.
Pressing the function button allows you to access to the voice configuration menu. For additional
information about the voice configuration menu, see the “Voice Configuration Menu” section on
page 3-15.
Caution Never press the function button during an upgrade process. Doing so may interfere with the process and
may permanently disable the Cisco ATA.
Software Features
The Cisco ATA supports the following protocols, services and methods:
•Voice Codecs Supported, page 1-7
•Additional Supported Signaling Protocols, page 1-8
•Other Supported Protocols, page 1-8
•Cisco ATA SIP Services, page 1-8
•Fax Services, page 1-9
•Methods Supported, page 1-9
•Supplementary Services, page 1-10

Voice Codecs Supported

The Cisco ATA supports the following voice codecs (check your other network devices for the codecs
they support):
•G.711µ-law
•G.711A-law
•G.723.1
•G.729
•G.729A
•G.729B
•G.729AB