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Software Features
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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
Additional H.323 Services."
These services include the following features:
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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0)
1-8
Internet Protocol (IP)
Real-Time Transport Protocol (RTP)
Transmission Control Protocol (TCP)
Trivial File Transfer Protocol (TFTP)
User Datagram Protocol (UDP)
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
Type of Service (ToS) configuration for audio and signaling ethernet packets
Hotline and warmline support (private line automatic ringdown)
Debugging and diagnostic tools
Chapter 1
Cisco Analog Telephone Adaptor Overview
Chapter 4, "Basic and
OL-4804-01
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