Fax and modem support
49
SmartNode 5540 & 4140 Series User Manual
B
• Specifications
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)
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 (incl. Super G3 Fax)
Voice Signaling
SIPv2
SIPv2 over IPv6
SIPv2 over TLS - (licensed feature on SN4140)
SIP call transfer, redirect
Overlap or en-bloc dialing
DTMF in-band, out-of-band
Voice Routing—session router
Local switching (hairpinning)
Least cost routing
Interface huntgroups
Call-Distribution groups
Number blocking
Call Routing Criteria:
•
Interface
•
Calling/called party number
•
Time of day, day of week, date
•
Wildcard and regular expression matching