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Voice Connectivity 91
SmartLink 4020 User Manual B • Specifications
Voice Connectivity
2-wire Loopstart, RJ-11/12
Short haul loop 1.1 km @3REN
Caller-ID Type-1 FSK and ITU V.23/Bell 202 generation
Connectivity
2 10/100 Full Duplex/Autosensing Ethernet RJ-45
Voice Processing (signalling dependent)
SIP
MGCP
• Packet Cable NCS 1.0
• IETF MGCP 1.0
Voice codes
• G.711 A-Law/ -Law (64 kbps)
• G.726 (ADPCM 40, 32, 24, 16 kbps)
• G.723.1 (5.3 or 6.3 kbps)
• G.729ab (8 kbps)
G.168 echo cancellation
4 parallel voice connections
DTMF detection and generation
Carrier tone detection and generation
Silence suppression and comfort noise
Configurable dejitter buffer
DTFM in-band & out-of-band
Configurable transmit packet length
RTP/RTCP (RFC 1889)
Fax and Modem Support
G.711 transparent FAX
T.38 Fax relay (9.6 k, 14.4 k)