Cisco Systems 186 Manual De Usuario
C-3
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
Appendix C Cisco ATA Specifications
Physical Interfaces
Physical Interfaces
Ringing Characteristics
Software Specifications
Table C-4
Physical Interfaces
Description
Specification
Ethernet
Two RJ-45 connectors, IEEE 802.3 10BaseT standard
Analog telephone
Two RJ-11 FXS voice ports
Power
5 VDC power connector
Indicators
Function button with integrated status indicator
Activity LED indicating network activity
Table C-5
Ringing Characteristics
Description
Specification
Tip/ring interfaces for each RJ-11 FXS port (SLIC)
Ring voltage
40V
RMS
(typical, balanced ringing only)
Ring frequency
25 Hz
Ring waveform
Trapezoidal with 1.2 to 1.6 crest factor
Ring load
1400 ohm + 40
µF
Ringer equivalence number (REN)
Up to 5 REN per RJ-11 FXS port
Loop impedance
Up to 200 ohms (plus 430-ohm maximum telephone
DC resistance)
DC resistance)
On-hook/off-hook characteristics
On-hook voltage (tip/ring)
–50V
Off-hook current
27 mA (nominal)
RJ-11 FXS port terminating impedance option
The Cisco ATA186-I1 and Cisco ATA188-I1 provide
600-ohm resistive impedance. The Cisco ATA186-I2
and Cisco ATA188-I2 provide 270 ohm + 750 ohm //
150-nF complex impedance.
600-ohm resistive impedance. The Cisco ATA186-I2
and Cisco ATA188-I2 provide 270 ohm + 750 ohm //
150-nF complex impedance.
Table C-6
Software Specifications (All Protocols)
Description
Specification
Call progress tones
Configurable for two sets of frequencies and single set of on/off
cadence
cadence
Dual-tone multifrequency (DTMF)
DTMF tone detection and generation