Cisco WRP400-G1 Administration Guide - Page 33

Other ATA Software Features, Configuring Voice Services, Silence Suppression and Comfort Noise

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Configuring Voice Services ATA Software Features 3 Other ATA Software Features The following table summarizes other features provided by the WRP400. Feature Description Silence Suppression See "Silence Suppression and Comfort Noise Generation," on page 41. Modem and Fax Pass-Through • Modem pass-through mode can be triggered only by 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 passthrough. Adaptive Jitter Buffer The WRP400 can buffer incoming voice packets to 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 WRP400 has a Network Jitter Level control setting for each line of service. The jitter level determines how aggressively the WRP400 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 "Advanced Voice Fields," on page 57. International Caller ID Delivery In addition to support of the Bellcore (FSK) and Swedish/ 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 "Advanced Voice Fields," on page 57. Cisco Small Business WRP400 Administration Guide 31

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Configuring Voice Services
ATA Software Features
Cisco Small Business WRP400 Administration Guide
31
3
Other ATA Software Features
The following table summarizes other features provided by the WRP400.
Feature
Description
Silence
Suppression
See
“Silence Suppression and Comfort Noise
Generation,” on page 41
.
Modem and Fax
Pass-Through
•
Modem pass-through mode can be triggered only by
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
Buffer
The WRP400 can buffer incoming voice packets to
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 WRP400 has a Network Jitter Level control setting for
each line of service. The jitter level determines how
aggressively the WRP400 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
“Advanced Voice Fields,” on page 57
.
International Caller
ID Delivery
In addition to support of the Bellcore (FSK) and Swedish/
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
“Advanced Voice Fields,” on page 57
.