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FXS ports 57
SmartNode 4900 User Manual B • Specifications
FXS ports
The FXS ports provide for connection of up to 32 analog FXS devices on a 50- or 64-pin RJ-21X connector
located on the rear panel.
FXO ports
The FXO ports provide for connection of up to 32 analog FXO devices on a 50- or 64-pin RJ-21X connector
located on the rear panel.
PPP and Frame-Relay support
• X.21 or V.35 WAN
• Frame-Relay (8 PVCs)
• RFC1490, FRF.12 fragmentation
• LMI, Q.933D, ANSI 617D, Gang of Four (an encapsulation method created by the four companies: Cisco,
Northern Telecom, StrataCom, and DEC which differs from the IETF encapsulation)
• PPP, PAP, CHAP, LCP, IPCP
Voice processing (signaling dependent)
Voice codecs:
• G.711 A-Law/ -Law (64 kbps)
• G.726 (ADPCM 40, 32, 24, 16 kpbs)
• G.723.1 (5.3 or 6.3 kbps)
• G.729ab (8 kbps)
• Transparent pass through
• G.168 echo cancellation
• Up to 32 parallel voice connections
• 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
G.711 transparent FAX