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SN4554 Getting Started Guide
Note
Refer to the software feature matrix for the most up-to-date specifications.
DSP
One 4-channel DSP
Voice connectivity
Dual ISDN BRI SO (TE), 4-wire RJ45 port labeled BRI 0/0 and BRI 0/1
Point-to-point, point-to-multipoint configurable
Data connectivity
10/100Base-TX Ethernet WAN port
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 (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)
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
DSP
B • Specifications
41
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