Cisco IE-3000-8TC Administration Manual page 319

Settings
PSTN To SPA Gain
Ring Validation Time
Tip Ring Voltage Adjust
Ring Indication Delay
Operational Loop Current Min
Ring Timeout
On Hook Speed
Ring Threshold
Current Limiting Enable
Ringer Impedance
Line In Use Voltage
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OL-27022-01
Description
This field defines the amount of digital gain/attenuation, in decibels
(dB) applied to the signal sent from the PSTN to the SPA8800 device.
Increase this value if parties on the PSTN side are difficult to hear
by parties on your system or lower it if they are coming across too
loud. Range is -15 to 12 dB.
This field defines the smallest amount of time required by the
SPA8800 device to recognize a signal sent across the PSTN
connection as a ring signal. If a call from the PSTN is not signaling
a ring by a phone on your system, try increasing the validation time
until a phone on your system rings.
This field defines the amount of time to wait prior to the ring
indication occurring in a signal coming across the SPA8800 device.
Some amount of time, dependent on country, is required for caller
ID to be recognized for the call. Increase this time if a call that is
supposed to have caller ID is not showing anything on the display.
Decrease it if a ring appears to be occurring late or appears to be cut
off.
This field defines the minimum loop current that maintains the device
in an off-hook state. If the current is lower than this value, the device
will enter an on-hook state.
This field defines the maximum time allowed for the ring to cross
between the higher and lower thresholds. It is expressed as the
maximum allowed 1/f in which f is the ring frequency.
This field defines the speed with which a call goes from off-hook to
on-hook when the phone is hung up.
This field defines the minimum voltage that can be detected as a
ring.
This field controls the current alarm threshold.
This field sets the ringer impedance. Certain countries, like South
Africa, require a low ringer impedance.
This field sets the voltage that must be maintained across a line to
designate that the line is in use. This parameter should match the
value used by the PSTN.
Administration Guide for Cisco Business Edition 3000, Release 8.6(4)
Connection Settings
299