Table C-6 Software Specifications (All Protocols)
Description
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Specification
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Call progress tones
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Configurable for two sets of frequencies and single set of on/off cadence
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Dual-tone multifrequency (DTMF)
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DTMF tone detection and generation
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Fax
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G.711 fax pass-through and G.711 fax mode.
Enhanced fax pass-through is supported on the Cisco ATA. Success of fax transmissions up to 14.4 kbps depends on network conditions, and fax modem/fax machine tolerance to those conditions. The network must have reasonably low network jitter, network delay, and packet-loss rate.
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Line-echo cancellation
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• Echo canceller for each port
• 8 ms echo length
• Nonlinear echo suppression (ERL > 28 dB for frequency = 300 to 2400 Hz)
• Convergence time = 250 ms
• ERLE = 10 to 20 dB
• Double-talk detection
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Out-of-band DTMF
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• H.245 out-of-band DTMF for H.323
• RFC 2833 AVT tones for SIP, MGCP, SCCP
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Configuration
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• DHCP (RFC 2131)
• Web configuration via built-in Web server
• Touch-tone telephone keypad configuration with voice prompt
• Basic boot configuration (RFC 1350 TFTP Profiling)
• Dial plan configuration
• Cisco Discovery Protocol
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Quality of Service
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• Class-of-service (CoS) bit-tagging (802.1P)
• Type-of-service (ToS) bit-tagging
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Security
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• H.235 for H.323
• RC4 encryption for TFTP configuration files
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Voice coder-decoders (codecs)
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Note In simultaneous dual-port operation, the second port is limited to G.711 when using G.729.
• G.723.1
• G.729, G.729A, G.729AB
• G.723.1
• G.711A-law
• G.711µ-law
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Voice features
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• Voice activity detection (VAD)
• Comfort noise generation (CNG)
• Dynamic jitter buffer (adaptive)
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Voice-over-IP (VoIP) protocols
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• H.323 v2
• SIP (RFC 2543 bis)
• MGCP 1.0 (RFC 2705)
• MGCP 1.0/network-based call signalling (NCS) 1.0 profile
• MGCP 0.1
• SCCP
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