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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
Chapter 1 Cisco Analog Telephone Adaptor Overview
Software Features
• SIP proxy server redundancy
• Outbound-proxy support
• DNS SRV support
• User-configurable, call-waiting, permanent default setting
• Comfort noise during silence period when using G.711
• Advanced audio
• Billable features
• Caller ID format
• Ring cadence format
• Silence suppression
• Hook-flash detection timing configuration
• Configurable on-hook delay
• UDP Type of Service (ToS) configuration
• Debugging and diagnostic tools
Fax Services
The Cisco ATA supports two modes of fax services, in which fax signals are transmitted using the G.711
codec:
• Fax pass-through mode—Receiver-side Called Station Identification (CED) tone detection with
automatic G.711A-law or G.711µ-law switching.
• Fax mode—The Cisco ATA is configured as a G.711-only device.
How you set Cisco ATA fax parameters depends on what network gateways are being used. You may
need to modify the default fax parameter values (see Chapter 7, “Configuring and Debugging Fax
Services”).
Note Success of fax transmission depends on network conditions and fax modem response to these conditions.
The network must have reasonably low network jitter, network delay, and packet loss rate.
Methods Supported
The Cisco ATA supports the methods listed below. For more information, refer to RFC3261 (SIP:
Session Initiation Protocol).
• REGISTER
• INVITE
• BYE
• CANCEL
