
Version 5.6 385 November 2008
SIP User's Manual 10. Selected Technical Specifications
Function Specification
Voice & Tone Characteristics
Voice Compression
G.711 PCM at 64 kbps µ-law/A-law; G.723.1 MP-MLQ at 5.3 or 6.3
kbps; G.726 at 32 kbps ADPCM; G.729 CS-ACELP 8 Kbps Annex
A / B
Silence Suppression
G.723.1 Annex A; G.729 Annex B; PCM and ADPCM [Standard
Silence Descriptor (SID) with Proprietary Voice Activity Detection
(VAD) and Comfort Noise Generation (CNG)].
Packet Loss Concealment
G.711 appendix 1; G.723.1; G.729 a/b
Echo Canceler
G.165 and G.168 2000, 64 msec
Gain Control
Configurable
DTMF Transport (in-band)
Mute, transfer in RTP payload or relay in compliance with RFC
2833
DTMF Detection and
Generation
Dynamic range 0 to -25 dBm, compliant with TIA 464B and
Bellcore TR-NWT-000506
Call Progress Tone Detection
and Generation
32 tones: single tone, dual tones or AM tones; configurable
frequency & amplitude; 64 frequencies in the range 300 to 1980
Hz; 1 to 4 cadences per tone; up to 4 sets of ON/OFF periods
Answer Detector
Speech detection
Output Gain Control
-32 dB to +31 dB in steps of 1 dB
Input Gain Control
-32 dB to +31 dB in steps of 1 dB
Fax/Modem Relay
Fax Relay
Group 3 fax relay up to 14.4 kbps with automatic fallback
T.38 compliant, real time fax relay
Tolerant network delay (up to 9 seconds round trip)
Modem Transparency
Auto switch to PCM or ADPCM on V.34 or V.90 modem detection
Protocols
VoIP Signaling Protocol
SIP RFC 3261
Communication Protocols
RTP/RTCP packetization
IP stack (UDP, TCP, RTP)
Remote software upload (TFTP, HTTP and HTTPS)
Line Signaling Protocols
Loop-start signaling
Processor
Control Processor
Motorola PowerQUICC 860
Control Processor Memory
SDRAM – 64 MB
Signal Processors
AudioCodes AC482 VoIP DSP
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