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Call progress tones |
Configurable for two sets of frequencies and single set of on/off cadence |
Dual-tone multifrequency (DTMF) |
DTMF tone detection and generation |
Fax |
Fax pass-through and T.38 fax relay mode. V34 fax is supported for pass-through mode. Success of fax transmissions up to 33.6 kb/s 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. The ATA 190 only supports T38 Fax Relay Version 0 (G3). |
Line-echo cancellation |
- Echo canceler 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 |
RFC 2833 AVT tones for SIP Note Cannot transmit RFC 2833 and in-band signaling, simultaneously. |
Configuration |
- DHCP (RFC 2131)
- Web configuration via built-in web server
- Basic boot configuration (RFC 1350 TFTP Profiling)
- Dial plan configuration
- Cisco Discovery Protocol
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Quality of Service |
- Class-of-service (CoS) bit-tagging (802.1P)
- Type-of-service (ToS) bit-tagging
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Security |
Encryption for TFTP configuration files |
Voice coder-decoders (codecs) |
- G.729A, G.729AB
- G.711A-law
- G.711µ-law
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Voice features |
- Voice activity detection (VAD)
- Comfort noise generation (CNG)
- Dynamic jitter buffer (adaptive)
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Voice-over-IP (VoIP) protocols |
SIP (RFC 3261) |