AudioCodedTM Enabling Technology Products
Voice over Packet Processor
The highly featured, low cost and low power consumption AC481xx enables
the rapid development of medium density gateways, access devices and
routing/switching equipment, Residential Gateways and Integrated Access
Devices (IAD). With AudioCodes' field-proven, feature-rich software, the route
to the complete solution is fast and smooth.
Deliver Feature-Rich Solution
The AC481xx voice over packet processor combines up to five channels of
toll quality low bit rate voice compression, with a G.168-2000 compliant echo
canceller, and complete voice band processing functions in a single device.
With configurable tail length of up to 40 msec, the AC481xx delivers an
adaptive, state of the art echo canceller. Field-proven G3 Fax Relay, compliant
with the T.38 ASN.1 standard, is a major enhancement to the AC481xx offering.
Other advanced features include dynamic packet size programming, high
quality DTMF/MF R1/MF R2/Call Progress Tones, detection and generation
of user defined tones and Caller ID, Silence Suppression and automatic
Voice/Fax/Data discriminator.
Fast Integration with Software Stacks
¥ Low per-channel cost and power
The AC481xx is supported by the VoicePacketizerTM software stack which
enables the processor to create a VoIP-compliant media stream as part of a
Media Gateway entity. The VoicePacketizerô is an ANSI-C software stack that
supports the RTP/RTCP protocol. The software stack also provides a simple
API for initialization and configuration of the AC481xx and for run-time call
control. The VoicePacketizerTM enables easy control of the packet processor
and fast time-to-market.
¥ Proprietary evaluation &development tools
Software Upgrades
Independent multi-channel operation
Toll quality voice compression
Robust bandwidth-saving fax relay
Field-proven reference designs
The complete functionality of the multi-channel processor is implemented in
the internal firmware, which is downloaded into the processor by the host
prior to start of the operation. This allows the addition of new features in
future product releases without system hardware modifications.
Benefit From Extensive Experience
AudioCodes is one of the world's leading providers of DSP solutions since
1996. During this period, the company successfully passed numerous
interoperability tests, while maintaining high levels of performance. AudioCodes'
commitment to innovation yields consistently high-quality voice processing
products that are feature-rich and field-proven. AudioCodes has deployed
more than 5 million VoP ports to date.
AC481xx Features
Wireline & wireless low bit rate Vocoders
Low power consumption & small footprint
G.168-2000 compliant Echo Canceller
T.38 compliant Fax Relay
Complete Voice Band Signaling support
Caller ID support
AudioCodedTM Enabling
for Enhanced Voice Services
Software Specifications
Channel Density
Voice Coders
Silence Suppression
Fax Support
Modem Support
Echo Canceller
Caller ID Detection
and Generation
In-Band Signaling
Detection and Generation
E&M Sampling Resolution
Input/Output Gain Control
Up to five low bit rate
G.729A CS-ACELP at 8 kbps,
G.723.1 MP-MLQ at 6.3 kbps, ACELP at 5.3 kbps,
G.727 E-ADPCM at 16-40 kbps,
G.726 ADPCM at 16-40 kbps,
G.711 PCM (µ/A-law),
GSM FR 6.10 at 13 kbps,
NetCoder® at 6.4-9.6 kbps, 800 bps steps
Optional: G.728 LD-CELP at 16 kbps
VAD & CNG: G.723.1A, G.729 Annex B, GSM FR 6.10
Proprietary: G.728, G.711, G.726, G.727
Automatic switching
G3 2.4 - 14.4 kbps, T.38 compliant fax relay or automatic switch to PCM
Up to V.92 rates, automatic switch to PCM
G.168-2000 compliant, up to 40 msec configurable echo tail
Bellcore Type 1
DTMF (TIA 464B), MFR1,
MFR2, AC15, SS4, SS5,
User Defined and Call Progress tones
1 msec
-31 dB +31 dB, 1 dB steps
Hardware Specifications
PCM Interface
Host Port Interface
Digital Interface Levels
Power Supply
Power Consumption
1.544, 2.048, 4.096 or 8.192 Mbps, µ/A-Law
8 bit Bidirectional
3.3V logic compatible
+2.5V (core), +3.3V (I/O)
200 mW (typ)
144 pin TQFP (AC481-C)
144 pin BGA (AC481-CB)
Voice over IP Gateways
Integrated Access Devices (IAD)
Multi Service Access Platforms
Residential Gateways
Edge Switching Equipment
About AudioCodes
AudioCodes Ltd. (NASDAQ: AUDC) designs,
develops and markets Voice over Packet media
gateway technologies and systems for
converged networks. The company is a market
leader in voice compression technology and
the key originator of the ITU G.723.1 standard
for the emerging Voice over IP market.
AudioCodes' product line includes enabling
technology products such as Voice over Packet
chip processors, VoIP communication boards,
VoIP media gateway modules and CPE devices.
In addition, AudioCodes provides OEMs with
media gateway system solutions for packet
networks in the wireline, wireless, broadband
access and media server markets.
International Headquarters
4 HaHoresh Street
Yehud, Israel 56470
Tel: +972-3-539-4000
Fax: +972-3-539-4040
US Headquarters
2890 Zanker Road, Suite 200
San Jose, CA 95134
Tel: +1-408-577-0488
Fax: +1-408-577-0492
Room 209, Tower A, Grand Pacific Building
8A Guanghua Road
Chao Yang District
Beijing 100026, P. R. China
Tel: +86-10-6581-6622
Fax: +86-10-6581-5599
S Building B1F, 2-30-2
Chuou, Nakano-ku
Tokyo 164-0011, Japan
Tel/Fax: +81-3-5348-1405
E-Mail [email protected]m
© 2003 AudioCodes Ltd. All rights reserved. AC, AudioCodes, AudioCodes
logo, AudioCodes, IPmedia, Mediant, MediaPack, MP-MLQ, NetCoder, Stretto,
TrunkPack and VoicePacketizer are trademarks or registered trademarks
of AudioCodes Ltd. All other marks are the property of their respective
owners. The information and specifications in this document and the
product(s) are subject to change without notice.
Ref # LTRT-00230 01/03 V.6