Cisco Systems SPA2102, SPA3102, WRP400, PAP2T Line tabs. See ATA Voice Field Reference, on page121

Introducing Cisco Small Business Analog Telephone Adapters	1
ATA Software Features

Feature	Description
Modem and Fax	• Modem pass-through mode can be triggered only by
Pass-Through	predialing the number set in the Modem Line Toggle Code.
	(Set in the Regional tab.)
	• FAX pass-through mode is triggered by a CED/CNG tone or
	an NSE event.
	• Echo canceller is automatically disabled for Modem pass-
	through mode.
	• Echo canceller is disabled for FAX pass-through if the
	parameter FAX Disable ECAN (Line 1 or 2 tab) is set to “yes”
	for that line (in that case FAX pass-through is the same as
	Modem pass-through).
	• Call waiting and silence suppression is automatically
	disabled for both FAX and Modem pass-through. In addition,
	out-of-band DTMF Tx is disabled during modem or fax pass-
	through.
Adaptive Jitter	The ATA device can buffer incoming voice packets to
Buffer	minimize out-of-order packet arrival. This process is
	known as jitter buffering. The jitter buffer size proactively
	adjusts or adapts in size, depending on changing network
	conditions.
	The ATA device has a Network Jitter Level control setting
	for each line of service. The jitter level determines how
	aggressively the ATA device tries to shrink the jitter buffer
	over time to achieve a lower overall delay. If the jitter level
	is higher, it shrinks more gradually. If jitter level is lower, it
	shrinks more quickly.
	Adaptive Jitter Buffer is configured in the Line and PSTN
	Line tabs. See “ATA Voice Field Reference,” on page121.
International Caller	In addition to support of the Bellcore (FSK) and Swedish/
ID Delivery	Danish (DTMF) methods of Caller ID (CID) delivery, ATAs
	provide a large subset of ETSI-compliant methods to
	support international CID equipment. International CID is
	configured in the Line and PSTN Line tabs. See “ATA Voice
	Field Reference,” on page121.
Secure Calls	A user (if enabled by service provider or administrator)
	has the option to make an outbound call secure in the
	sense that the audio packets in both directions are
	encrypted. See ”Secure Call Implementation” section on
	page 72.

ATA Administration Guide 28