Modem Standards; Fax Services; Methods Supported - Cisco ATA 190 Administration Manual

Chapter 1 Cisco ATA 190 Analog Telephone Adapter Overview
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Modem Standards

The ATA 190 supports the following modem standards:
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Fax Services

The ATA 190 supports two modes of fax services:
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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 ATA 190 supports these methods. For more information, see RFC3261 (SIP: Session Initiation
Protocol).
OL-31821-02
Comfort noise during silent period when using G.711u/a and G.729ab
Caller ID format
Ring frequency/voltage adjustment
Hookflash detection timing configuration
Type of Service (ToS) configuration for audio and signaling Ethernet packets
Debugging and diagnostic tools
V.90
V.92
V.44
K56Flex
ITU-T V.34 Annex 12
ITU-T V.34
V.32bis
V.32
V.21
V.22
V.23
Fax pass-through mode: Receiver-side Called Station Identification (CED) tone detection with
automatic G.711A-law or G.711µ-law switching.
T.38 Fax Relay mode: The T.38 fax relay feature enables devices to use fax machines to send files
over the IP network. In general, when a fax is received, it is converted to an image, then sent to the
T.38 fax device. When the target T.38 fax device receives this image, the device converts the image
back to an analog fax signal. T.38 fax relays configured with voice gateways decode or demodulate
the fax signals before they are transported over IP.
Cisco ATA 190 Analog Telephone Adapter Administration Guide for SIP (Version 1.1)
Software Features
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