Cisco Systems ATA 188 manual Physical Interfaces, Ringing Characteristics, Software Specifications

Appendix C Cisco ATA Specifications

Physical Interfaces

Physical Interfaces

Table C-4 Physical Interfaces

Description	Specification
Ethernet	Two RJ-45, IEEE 802.3 10BASE-T standard
Analog telephone	Two RJ-11 FXS voice ports
Power	5 VDC power connector
Indicators	Function button with integrated status indicator
	Link and activity LED indicating network activity

Ringing Characteristics

Table C-5 Ringing Characteristics

	Description	Specification
	Tip/ring interfaces for each RJ-11 FXS port (SLIC)
	Ring voltage	40VRMS (typical, balanced ringing only)
	Ring frequency	25 Hz
	Ring waveform	Trapezoidal with 1.2 to 1.6 crest factor
	Ring load	1400 ohm + 40 microF (per line)
	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)
	On-hook/off-hook characteristics
	On-hook voltage (tip/ring)	–50V
	Off-hook current	25 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.
Software Specifications

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
	Dual-tone multifrequency (DTMF)	DTMF tone detection and generation
	Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)
OL-3141-01			C-3