Appendix C Cisco ATA Specifications
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| Physical Interfaces |
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Physical Interfaces |
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| Description | Specification |
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| Ethernet | Two |
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| Analog telephone | Two |
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| Power | 5 VDC power connector |
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| Indicators | Function button with integrated status indicator |
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| Activity LED indicating network activity |
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Ringing Characteristics |
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| Description |
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| Tip/ring interfaces for each |
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| Ring voltage |
| 40VRMS (typical, balanced ringing only) |
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| Ring frequency |
| 25 Hz |
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| Ring waveform |
| Trapezoidal with 1.2 to 1.6 crest factor |
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| Ring load |
| 1400 ohm + 40∝F |
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| Ringer equivalence number (REN) |
| Up to 5 REN per |
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| Loop impedance |
| Up to 200 ohms (plus |
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| DC resistance) |
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| 27 mA (nominal) |
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| The Cisco |
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Software Specifications |
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Table
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| Call progress tones | Configurable for two sets of frequencies and single set of on/off | |||
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| cadence | |||
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| DTMF tone detection and generation | ||||
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| Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP) |
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