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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
OL-4008-01
Chapter1 Cisco Analog Telephone Adaptor Overview
Software Features
Internet Control Message Protocol (ICMP)
Internet Protocol (IP)
Real-Time Transport Protocol (RTP)
Transmission Control Protocol (TCP)
Trivial File Transfer Protocol (TFTP)
User Datagram Protocol (UDP)
Cisco ATA H.323 Services
For a list of required H.323 parameters as well as descriptions of all supported Cisco ATA H.323 services
and cross references to the parameters for configuring these services, see Chapter 4, “Basic and
Additional H.323 Services.”
These services include the following features:
Supports direct IP dialing to and from a Cisco ATA without using an H.323 gatekeeper
Supports direct IP dialing in addition to proxy-routed calls to and from either phone
Uses the same configurable MediaPort to transmit and receive RTP audio
Uses UDP only for H.323 RAS message transmission
Uses a TCP connection for H.225/Q.931 signaling (such as call setup, call proceeding, alerting, and
call connect)
IP address assignment—DHCP-provided or statically configured
Cisco ATA configuration by means of a TFTP server, web browser, or voice configuration menu.
VLAN configuration
Cisco Discovery Protocol (CDP)
Low-bit-rate codec selection
User authentication
Configurable tones (dial tone, busy tone, alert tone, reorder tone, call waiting tone)
Dial plans
User-configurable, call-waiting, permanent default setting
Silence suppression and comfort noise generation for G.711, G.723.1 (G.723.1 Annex A), and
G.,729 (G.729 Annex B)
Caller ID format
Ring cadence format
Hook-flash detection timing configuration
UDP Type of Service (ToS) configuration
Hotline and warmline support (private line automatic ringdown)
Debugging and diagnostic tools