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DSP 39
SmartNode 4120 User Manual B • Specifications
DSP
One 2/4 channel DSP
Voice connectivity
Single/dual ISDN BRI So (TE), 4-wire RJ45 port labeled BRI
Point-to-point, point-to-multipoint configurable
Data connectivity
10/100Base-TX Ethernet WAN port
Full duplex, autosensing, auto-MDX
Voice processing (signaling dependent)
2/4 full-duplex channels of Voice CODECS:
• G.711 A-Law/ -Law (64 kbps)
• G.726 (ADPCM 40, 32, 24, 16 kbps)
• G.723.1 (6.3 kbps)
• G.729ab (8 kbps)
• Transparent ISDN data
G.168 echo cancellation
DTMF detection and generation
Carrier tone detection and generation
Silence suppression and comfort noise
Configurable dejitter buffer
Configurable tones (dial, ringing, busy)
Configurable transmit packet length
RTP/RTCP (RFC 1889)
Fax and modem support
Automatic fax and modem detection
Codec fallback for modem-bypass
T.38 Fax-Relay (Gr. 3 Fax, 9.6 k, 14.4 k)
G.711 Fax-Bypass
Voice signalling
SIPv2