Physical Interfaces; Ringing Characteristics - Cisco ATA 191 Administration Manual

ATA 191 Specifications

Physical Interfaces

Table 14: Physical Interfaces
Description
Ethernet
Analog phone
Power

Ringing Characteristics

Table 15: Ringing Characteristics
Description
Tip/ring interfaces for each RJ-11 FXS port (SLIC)
Ring voltage
Ring frequency
Ring waveform
Ring load
Ringer equivalence number (REN)
Loop impedance
On-hook/off-hook characteristics
On-hook voltage (tip/ring)
Off-hook current
RJ-11 FXS port terminating impedance option
Specification
One RJ-45 connector, IEEE 802.3 100BaseT standard
Two RJ-11 FXS voice ports
5 VDC power connector
Cisco ATA 191 Analog Telephone Adapter Administration Guide for Cisco Unified Communications Manager
Specification
70VRMS (typical, balanced ringing only)
20 Hz
Trapezoidal with 1.2 to 1.6 crest factor
1400 ohm + 40μF
Up to 5 REN per RJ-11 FXS port
Up to 200 ohms (plus 430-ohm maximum phone DC
resistance)
–47V
24 mA (nominal)
The ATA 191 provides multiple impedance, such as 600
ohm for American SKU, 900 ohm for European SKU,
220 ohm (820 ohm || 120nF) for Australian SKU, and
so on.

Physical Interfaces

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