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The Evolution of the Remote Access Server (RAS) to a Universal Port-Enabled Platform
PDF of this tutorial8. Universal Port Software Features
- physical layer analog modem protocols
- ITU V.23 at 75/1,200 bps
- Bell 103 at 300 bps
- ITU V.21 at 300 bps
- ITU V.22 at 1,200 bps
- Bell 212A at 1,200 bps
- ITU V.22bis at 2,400 bps
- ITU V.32 4,800 to 9,600 bps
- ITU V.32bis 4,800 to 14,400 bps
- ITU V.34 2,400 to 28,800 bps
- ITU V.34+ 2,400 to 33,600 bps
- K56flex server 32,000 to 56,000 bps
- ITU V.90 server 28,000 to 56,000
- ITU V.91 server to server 28,000 to 64,000 bps
- ITU V.92 server (future ITU standard)
- V.2 power level over POTS
- V.25 auto call/answer
- V.8 auto startup procedure
- V.8bis auto startup procedure
- V.32bis Annex A startup procedure
- near-end echo cancellation
- modem pass-through (PCM)
- link layer and compression protocols
- V.14 asynchronous
- V.42 LAPM
- V.42bis (minimum 2K dictionary)
- MNP 2-4
- MNP 5
- modem relay
- V.44 (LZJH) compression (future ITU standard)
- command interface
- AT command set with dial modifiers support (for modem/fax/ISDN dialout, reverse telnet, configuration, chat scripts)
- DSP-based, in-band dial-abort and escape character detection with API support for separate notification messages
- Hayes escape sequence
- fax protocols
- Group III Class II
- V.17 at 7,200; 9,600; 12,000; and 14,000 bps
- V.27ter at 2,400 and 4,800 bps
- V.29 at 7,200 and 9,600 bps
- T.30 fax termination (originate/answer)
- fax pass-through (PCM)
- T.38 real-time fax relay
- fax relay on FRF.11
- fax relay on AAL2
- in-band signaling
- DTMF generation/detection
- MF generation/detection
- CP tone detection for T1 CAS
- SS7 ring back tone generation
- SS7 COT
- SR-2275 Type 100 test line (DS-0 quiet test)
- SR-2275 Type 102 test line (DS-0 1kHz/1004Hz 0dBm0 test tone)
- SR-2275 Type 108 test line (DS-0 loop back)
- R2 signaling support (compelled, noncompelled, semicompelled)
- R1 signaling support (noncompelled, semicompelled)
- encapsulation
- asynchronous PPP
- SLIP
- digital carrier services, ISDN
- synchronous-mode PPP (ISDN) (HDLC framed PPP)
- HDLC framing service (required for V.120 host offloading)
- V.110
- 56K rate adaptation
- voice carrier services
- G.711 PCM 64 kbps
- G.722 wideband codec 48, 56, and 64 kbps
- G.723.1 5.3/6.3 kbps
- G.723.1 Annex A (silence compression)
- G.726 ADPCM 16, 24, 32, 40 kbps
- G.727 ADPCM
- G.728 16 kbps
- G.729 8 kbps
- G.729 AB 8 kbps (Annex A and B-VAD, CNG)
- G.729 Annex D 6.4 kbps
- G.729 Annex E 11.8 kbps
- GSM full-rate codec
- GSM enhanced full rate
- G.165/G.168 echo cancellation
- packet playout unit (dejitter buffer, lost-packet compensation)
- voice activity detection (VAD) silence suppression
- comfort noise generation (CNG)
- comfort noise level control
- AAL2 ATM framing for voice
- FRF.11 frame relay framing for voice
- RTP packet encapsulation for voice
- autoswitch to fax store-and-forward upon fax detection
- autoswitch from G.7xx to G.711 upon fax detection
- DTMF relay
- DTMF detection during voice mode
- configurable call progress detection parameters
- configurable voice packetization rates
- management services/other
- API support (management, event monitoring/reporting, statistics)
- set-able country code (per channel at run-time)
- loopback test capabilities
- core dump facility
- local eye pattern support
- remote eye pattern support
- memory read/write support
- trace messages
