Linksys Linksys SPA9000, Administration Manual

Page: 209 / 246

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