AC4830xC-C AudioCodes Voice over Packet Processor for Client Applications Functional Description Overview The AC4830xC-C supports 1, 2 or 4 low bit rate voice, fax or data transmission channels. For voice transmission, the analog inputs are digitized by external PCM codecs, input through the AC4830xC-C's PCM interface, and compressed to one of the supported bit rates. The compressed voice/fax/data bit streams are transmitted to the host processor through the AC4830xC-C's Parallel Interface. The voice receive operation is performed simultaneously with the voice transmit operation. The compressed voice/fax packets from a remote unit are received from the host processor through the Parallel Interface. The packetized voice/fax bit streams are de-compressed to 64 kbps µ/A-law PCM bit streams and output through the PCM interface to a time division multiplexed PCM highway or external PCM codecs. The channels can operate simultaneously with different voice coders or fax relay at different bit rates in each channel. The packet exchange with the host depend on the frame size of the selected voice codec. In every access to the AC4830xC-C the host reads the outgoing voice/fax payload and status packet and writes the incoming voice/fax payload and control packet. Soft upgradability The AC4830xC-C feature set can be updated by a downloadable software upgrade by the host processor prior to start of operation. This allows the addition of new features in future product releases without system hardware modifications. Selected specifications Number of channels 1, 2 or 4 Voice codecs G.729A CS-ACELP, Ordering information Device name Channels G.723.1 6.3/5.3 kbps, G.727 E-ADPCM, AC48301CB-C 1 G.726 ADPCM, AC48301CE1-C 1 G.711 PCM, AC48301CE2-C 1 NetCoder* @ 6.4-9.6 kbps AC48301CE3-C 1 G3 2.4 - 14.4 kbps, AC48302CB-C 2 T.38 or FRF.11 compliant AC48302CE1-C 2 Caller ID Bellcore standard AC48302CE2-C 2 Voice/fax Automatic switching AC48302CE3-C 2 Echo canceller G.168 compliant, AC48304CB-C 4 25ms tail length for AC48301, AC48304CE1-C 4 AC48302 AC48304CE2-C 4 Fax relay 15ms tail length for AC48304 Signaling DTMF (TIA 464B), call progress and user defined tone pairs In-band E&M, 1mS resolution Input/output gain -31dB : 31dB, 1.0dB steps PCM Interface 64 kbps, compatible with PCM codecs and PCM highways Ref# 04.2000/ V.02 PCM companding µm/A- law (selectable) Package 144 pin TQFP Specifications subject to change without prior notice. International Headquarters USA 4 Hahoresh Road, Yehud, Israel 56470 Tel: +972 (3) 539-4000 Fax: +972 (3) 539-4040 2890 Zanker Rd., San Jose, CA 95134 Tel: (408) 577-0488 Fax: (408) 577-0492 E-mail: [email protected] www.audiocodes.com AudioCodes AC4830xC-C Voice over Packet Processor for Client Applications Features 1, 2 or 4 channels of G.729A, G.723.1, G.727, G.726, G.711 and NetCoder voice codecs Low cost Independent channel operation Toll quality voice compression Robust bandwidth -saving fax/data relay Small footprint T.38 or FRF.11 compliant fax relay at 2.4 14.4 kbps Caller ID support Automatic switching to PCM or ADPCM upon fax/data detection G.168 compliant 25ms length adaptive echo canceller (15ms for AC48304C-C) High performance Voice Activity Detector (VAD) and Comfort Noise Generator (CNG) DTMF detection and generation Call-progress and user-defined tones generation Parallel host processor interface Selectable µ/A-law PCM codec interface PCM highway interface for voice, fax, data and signaling Input and output gain control E&M signaling option Low power consumption Description Cable telephony access devices SOHO voice/data access devices The AC4830xC-C VoP processor is a 1, 2 or 4 ports Voice over Packet Processor that combines toll quality low bit rate voice compression, T.38 compliant fax relay and other voice band processing functions. The AC4830xC-C features G.723.1, G.729A, G.711, G.726 and G.727 standard ITU codecs, as well as the NetCoder, a proprietary, high quality 6.4-9.6 kbps coder. The codec can be selected independently by the user for each channel. An adaptive, DSL access devices G.168 compliant echo canceller, a high quality DTMF and Tone Signaling detector and other Voice enabled set-top boxes variety of Voice over IP, Voice over DSL and other voice-over-packet terminal applications. voice processing features makes the AC4830xC-C an ideal voice processing engine for a