
| A • Specifications | Model 4520 & 4110 Series Getting Started Guide | 
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DSP
One or two 
Voice connectivity
Programmable AC impedance, feeding, and ring voltage; 
Connectivity
2 10/100 Full Duplex/Autosensing Ethernet 
Voice processing (signalling dependent)
Voice codes:
•G.711 
•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
8 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
Fax over IP (FoIP)
T.38 Fax relay (9.6 k, 14.4 k)
| 56 | DSP | 
