|
Description |
Specification |
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
|
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.
|
Line-echo cancellation
|
- 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
|
Out-of-band DTMF
|
- H.245 out-of-band DTMF for H.323
- RFC 2833 AVT tones for SIP, MGCP, SCCP
|
Configuration
|
- 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 for SCCP
|
Quality of Service
|
- Class-of-service (CoS) bit-tagging (802.1P)
- Type-of-service (ToS) bit-tagging
|
Security
|
- H.235 for H.323
- RC4 encryption for TFTP configuration files
|
Voice coder-decoders (codecs)
|
 |
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
|
Voice features
|
- Voice activity detection (VAD)
- Comfort noise generation (CNG)
- Dynamic jitter buffer (adaptive)
|
Voice-over-IP (VoIP) protocols
|
- 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
|
