Voice Processing (signalling dependent)
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SmartNode 5531 User Manual
B
• Specifications
Voice Processing (signalling dependent)
Four or eight full-duplex channels with Voice CODECS:
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G.711 A-Law/-Law (64 kbps)
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G.722 (64 kbps)
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G.726 (ADPCM 16,24,32,40 kbps)
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G.723.1 (5.3 or 6.3 kbps)
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G.729ab (8kbps)
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Transparent ISDN data
G.168 echo cancellation (128ms)
Four or eight simultaneous low-bandwidth voice or T.38 fax calls
DTMF detection and generation
Carrier tone detection and generation
Silence suppression and comfort noise
Adaptive and configurable dejitter buffer
Configurable tones (dial, ringing, busy, etc.)
Configurable transmit packet length
RTP/RTCP (RFC 1889)
SRTP (RFC 3711)
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
SIP call transfer, redirect
Overlap or en-bloc dialing
DTMF in-band, out-of-band
Configurable progress tones
Voice Routing—Session Controller
Local switching (hairpinning)
Least cost routing
