AC4810XA-C [ETC]
4/5信道VoP处理器 ; 4/5信道的VoP处理器\n
| 型号： | AC4810XA-C |
| 厂家： | 
ETC |
| 描述： | 4/5信道VoP处理器
|
| 文件： | 总2页 (文件大小：90K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AC48116A-C
High Density PCM / ADPCM Voice over Packet Processor
Features
16 G.711(PCM) channels with 15ms echo
canceller
DTMF, MFR1, MFR2, AC15, SS4, SS5, call
progress and user-defined tones detection and
generation
Full trunk with two chips
12 G.711 (PCM) channels with 25ms echo
canceller
G.168 compliant adaptive echo canceler
Complete voice-band
subsystem
8 G.711 (PCM) channels with 50ms echo
canceller
Highly efficient packet interface to the
host CPU
6 G.711 channels with 60ms echo canceller
or 6 G.726 (32 kbps ADPCM) channels with
10ms echo canceller
Dynamic packet size programming
Optional on-chip adaptive jitter buffer
Optional caller ID support
Fast time-to-market
Independent multi-channel
operation
Proprietary silence suppression
High performance Voice Activity Detector
(VAD) and Comfort Noise Generator (CNG)
ABCD trunk signaling
PCM highway trunk interface for voice
and signaling
Fax and modem signals detection
Input and output gain control
Description
The AC48116A-C is a complete DSP solution for high-density, carrier class Voice over IP gateways
or Voice over ATM access and edge switching products.
Carrier-class Voice over IP
Gateways
The AC48116A-C supports up to 16 non compressed full-duplex Voice over Packet Network
channels. The device combines toll quality PCM or ADPCM coding with long tail echo cancellation
and high quality DTMF detection and generation. Fax or modem transmissions are passed
transparently (in PCM) by the device with no performance degradation.
Voice over ATM access
devices
Multi Service Access
Platforms
Running m/A-law G.711 codec, the AC48116AC provides a tradeoff between the number of
channels and the echo canceller tail length: 16 channels with 15ms tail length, 12 channels with
25ms tail length, 8 channels with 50ms tail length or 6 channels with 60ms tail length.
For high-quality, "light" compression requirements, the chip supports 6 channels of G.726 (32 kbps
ADPCM) codec. An adaptive, G.168 compliant echo canceler and a high quality DTMF and Tone
Signaling detector and generator constitutes the ideal voice processing system on chip.
Edge Switching Equipment
The AC48116A-C transforms the digitized signals into packets, ready to be transported over packet
networks such as IP, Frame Relay or ATM. Integrating the AC48116A-C into the user's application
is facilitated by a hardware application note and by host CPU drivers supplied by AudioCodes.
AC48116A-C
High Density PCM / ADPCM Voice over Packet Processor
Functional Description
Overview
The AC48116A-C receives the digitized voice
samples through the PCM interface, applies
G.711 or G.726 encoding and transmits the
packetized voice, fax or data signals to the host
processor through the DSP Host Port Interface (HPI).
The voice receive and transmit operations are
performed simultaneously. The packetized
voice/fax/data frames are received from the host,
converted to 64 kbps m/A-law PCM bit streams
and played out to a time division multiplexed
PCM highway. The packets received from the
network are stored in an on-chip adaptive
de-jitter buffer, that accommodates the delay
variation and allows for a smooth play out of the
analog signals.
Selected specifications
Number of channels
16 G.711 with 15ms EC
12 G.711 with 25ms EC
8 G.711 with 50ms EC
6 G.711 with 60ms EC
6 G.726 with 10ms EC
G.711 PCM
Both real-time packet exchange, control & status
communication, are performed through the
8-bit Parallel Interface. The Host processor controls
the AC48116A-C by writing control and reading
status information from the command/status
buffer in the HPI. Outgoing packets from the DSP
are periodic and timed either by a DSP interrupt or
by host polling. Packets from the network can be
written by the host to the DSP in arbitrary timing
depending on their time of arrival. The host-DSP
packet exchange protocol has been optimized to
allow efficient transfer of multiple voice channel
packets with a minimum overhead.
Voice codecs
G.726 ADPCM, 32 kbps
G.168 compliant
Echo canceler
DTMF generation/detection
In-band signaling standards
TIA 464B compliant
MFR1, MFR2, AC15, SS4, SS5,
call progress, user defined
-31dB ¸ 31dB, 1.0dB steps
64 kbps, compatible with PCM
codecs and PCM highways
m/A-law (selectable)
Input/output gain control
PCM Interface
PCM companding
Power consumption
Package
200 mW (typ)
144 pin square TQFP or
144 pin BGA
AudioCodes provides a high level, ANSI-C source
code driver for the host CPU, for download,
control and monitoring of the AC48116A-C. The
AC48116A-C object code is downloaded to the
device by the host CPU prior to start of operation,
and it is fully field upgradeable.
Ordering information
AC48116AB-C TQFP package
AC48116AB-CB Micro star BGA package
Copyright © 2001 AudioCodes Ltd. All
rights reserved. Specifications subject to
change without prior notice.
International Headquarters
4 Hahoresh Road, Yehud, Israel 56470
Tel: +972 (3) 539-4000 Fax: +972 (3) 539-4040
USA
AudioCodes, the AudioCodes logo, AC,
AudioCoded, MP-MLQ, VoicePacketizer,
TrunkPack, IPmedia and NetCoder are
trademarks or registered trademarks of
AudioCodes Ltd.
2890 Zanker Rd., San Jose, CA 95134
Tel: (408) 577-0488 Fax: (408) 577-0492
Other company or product names are
the trademarks or registered trademarks
of their respective holders.
E-mail: marketing@audiocodes.com www.audiocodes.com
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