AC4830xC-C Data Book
Chapter 3. Chip Data and Timing
Revision 1.0
31
March 2000
3
CHIP DATA AND TIMING
3.1 General Specifications
Table
3-1: General Specifications (continues on 2 pages)
Characteristic
Value
Number of Channels:
Dual independent voice/fax/data channels - AC48302C-C
Single voice/fax/data channels - AC48301C-C
Voice Coders:
G.723.1 MP-MLQ/ACELP at 6.3/5.3 kbps,
G.729/Annex A CS-ACELP
1
at 8.0 kbps,
G.727 E-ADPCM at 16 to 40 kbps,
G.726 ADPCM at 16 to 40 kbps,
G.711 PCM at 64 kbps.
NetCoder
®
at 6.4 to 9.6 kbps.
Voice Packetization:
FRF.11 VoFR IA, or VoIP per RFC 1889.
Fax Relay Speeds:
Group 3 2400, 4800, 7200, 9600, 12000, 14400 bps.
Fax Modem Support:
V.17, V.21, V.27ter, V.29, V.33.
Voice/fax Switching:
Automatic.
Echo Cancelation:
G.168; Max. echo path: 25 ms.
DTMF Detection and
Generation:
Detection Resolution: 10 ms, Generation Resolution: 1 ms,
16 digits, compliant with TIA 464B.
VAD/CNG (Silence
Suppression):
G.729 B for G.729A coders, and G.723.1A for G.723.1 coders
High Grade proprietary for G.711, G.726/727 & NetCoder
®
.
VAD Response Time:
30 ms (max.) for G.723.1; 20 ms for NetCoder
®
;
10 ms for G.729A/G.729B; 5 ms for G.726/727 and G.711.
E&M Sampling Resolution:
1 ms.
Signaling Tone Generation:
User-defined Dual -Tone Signaling.
Tone Generation Frequency:
Resolution: 1 Hz,
Range:
0 to 4000 Hz.
Tone Generation Amplitude:
Resolution: 1 dB,
Range:
-31 to 3 dBm.
PCM Companding:
A-law / µ-law (selectable).
Analog Output Gain Control:
± 31 dB in steps of 1 dB.
1
CS-ACELP = Conjugate Structure – Algebraic Code Excited Linear Predictive.
Содержание AC4830 C-C Series
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