Linksys SPA9000 Administration Manual page 209

Impedance
Tip/Ring voltage
Operational loop current
Min
On-Hook speed
Ring frequency Min
Ring frequency Max
Ring Validation Time
Ring Indication Delay
Ring Timeout
Ring Threshold
Ringer Impedance
DC current Limiting
Caller Id & CP Tone Method
Battery reversal as
discconnect signal
Loop period shut-down as
disconnect signal
Minimum period for
disconnect signal
Linksys Voice System Administration Guide
The impedance of the lines that are connected to SPA400's telephony
ports
Default: 600 Ohms
The tip-to-ring voltage reserved for voice transmission
Default: 3.5 Volts
The minimum loop current that maintains an off-hook state. If the loop
current drops below this value, the phone enters on hook state.
Default: 10 mA
The time that the loop current drops to 0mA when the phone enters
the on-hook state.
Default: Less than 0.5ms
The minimum frequency of a valid ring
Default: 10
The maximum frequency of a valid ring
Default: 100
The minimum duration of a valid ring
Default: 256ms
The delay in reporting the ring after it presents on the PSTN line
Default: 512ms
The delay on reporting that the ring stopped after it no longer presents
on the PSTN line
Default: 640ms
The minimum voltage(rms value) of a valid ring
Default: 13.5-16.5vrms
Default: High
Default: Enable
The regional settings for Caller ID and call progress tones
Default: North American
Can be chosen as a method for signalling the end of a call
Default: unselected
Can be chosen as a method for signalling the end of a call
Default: selected
The minimum duration that the loop current is cut off to signal the end
of the call; used with the loop period shut-down method
Default: 750
Setup
207