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DSP 45
SmartNode 4552 & 4562 Getting Started Guide B • Specifications
Note Refer to the software feature matrix for the most up-to-date specifications.
DSP
One 2-channel DSP
Voice connectivity
2 ISDN BRI So (S/T), 4-wire RJ45
One Usr (TE) port labeled Line, one Net (NT) port labeled Phone
Point-to-point, point-to-multipoint configurable
Life-line cut-through relay between Line and Phone ports
Power feed-through between Line and Phone ports
Data connectivity
10/100Base-TX Ethernet WAN port
4-port 10/100Base-TX Ethernet LAN switch
All ports full duplex, autosensing, auto-MDX
Voice processing (signalling dependent)
2 full-duplex channels of Voice CODECS:
• G.711 A-Law/µ-Law (64 kbps)
• G.726 (ADPCM 40, 32, 24, 16 kbps)
• G.723.1 (5.3 or 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)
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