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C-4
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for H.323 (version 3.0)
OL-4804-01
Appendix C Cisco ATA Specifications
Software Specifications
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
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
Table C-6
Software Specifications (All Protocols) (continued)
Description
Specification