Appendix C Cisco ATA Specifications
Software Specifications
Table
Description | Specification |
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Fax | G.711 fax |
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| Enhanced fax |
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| Success of fax transmissions up to 14.4 kbps depends on |
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| network conditions, and fax modem/fax machine tolerance to |
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| those conditions. The network must have reasonably low |
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| network jitter, network delay, and |
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| • | Echo canceller for each port |
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| • 8 ms echo length |
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| • Nonlinear echo suppression (ERL > 28 dB for frequency |
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| = 300 to 2400 Hz) |
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| • Convergence time = 250 ms |
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| • ERLE = 10 to 20 dB |
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| • | H.245 |
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| • RFC 2833 AVT tones for SIP, MGCP, SCCP |
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Configuration |
| • | DHCP (RFC 2131) |
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| • Web configuration via |
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| prompt |
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| • Basic boot configuration (RFC 1350 TFTP Profiling) |
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| • | Dial plan configuration |
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| • | Cisco Discovery Protocol |
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Quality of Service |
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Security |
| • | H.235 for H.323 |
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| • RC4 encryption for TFTP configuration files |
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Voice |
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| Note |
| In simultaneous |
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| limited to G.711 when using G.729. |
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| • | G.723.1 |
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| • | G.729, G.729A, G.729AB |
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| • | G.723.1 |
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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
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