C-4
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
OL-4008-01
AppendixC Cisco ATA Specifications
Software Specifications
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
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
TableC-6 Software Specifications (All Protocols) (continued)
Description Specification