DSP
41
SmartNode 4131 User Manual
• Specifications
Note
Refer to the
for the most up-to-date specifications.
DSP
One 4, 8 or 16-channel DSP (depending on model)
Voice Connectivity
2, 4 or 8 ISDN BRI S0/T0 (S/T), 4-wire
RJ-45 ports NT/TE configurable per port
Point-to-point, point-to-multipoint configurable
Life-line bypass relay between BRI 0/0 and BRI 0/1 ports (0/2 and 0/3; 0/4 and 0/5; 0/6 and 0/7 - depends on
model: /R)
ISDN line power can be switched on per software per port
Data Connectivity
One or two 10/100/1000Base-TX Ethernet ports
All ports full duplex, autosensing, auto-MDX
Voice Processing (signalling dependent)
Four, eight, or 16 full-duplex channels with voice CODECS:
•
G.711 A-Law/-Law (64 kbps)
•
G.722 (64 kbps)
•
G.726 (ADPCM 16,24,32,40 kbps)
•
G.723.1 (5.3 or 6.3 kbps)
•
G.729ab (8kbps)
•
Transparent ISDN data
G.168 echo cancellation (128ms)
Four, eight, or 16 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)