LPS non-editable parameters

This topic describes parameters that are signaling specific.

Caution:

Most of the parameters that follow are signaling specific. Changing their value invalidates any approval certificate for the used board and can cause the board to malfunction. These parameters are described here for reference purposes only.


 

Field

Type/Unit

Default

Description

CIDalertmaxtime

ms

0

Maximum duration of an alert signal in caller ID protocol (if CID is enabled).

CIDmaxwaittime

ms

8000

Maximum time to wait for caller ID to arrive before concluding the caller has hung up (if CID is enabled).

CIDminmarktime

ms

100

Minimum duration of the mark signal of the caller ID protocol that is interpreted as such.

CIDtype

integer

0

Type of caller ID protocol, if CID is enabled:

0 - BellCore CID protocol

1 - NTT Japan CID protocol

2 - ETSI Ringing Pulse Alerting Signal CID protocol

dialtonemintime

ms

1000

For outgoing calls, the minimum duration of non-precise dial tone required before dialing will begin. Set this to 0 to disable non-precise dial tone detection. (Precise dial tone detection is controlled by NCC.START parameters).

To comply with CTR21 standards, do not modify GER, GBR, or FRA parameters.

dialtonewaittime

ms

5000

For outgoing calls, the maximum time to wait for initial dial tone.

To comply with CTR21 standards, do not modify GER, GBR, or FRA parameters.

freqdeglitchtime

count

26

For frequency-selective ring detection, deglitch time in 1/8 ms. Range is 2 to 80 (0.25 to 10 ms).

freqringhigh

Hz

54

For frequency-selective ring detection, the maximum frequency recognized.

To comply with CTR21 standards, do not modify GER, GBR, or FRA parameters.

freqringlow

Hz

16

For frequency-selective ring detection, the minimum frequency recognized.

To comply with CTR21 standards, do not modify GER, GBR, or FRA parameters.

freqringperiods

count

4

For frequency-selective ring detection, number of periods of the ring frequency needed to qualify. Range is 1 to 8.

freqtolerance

percentage

10

For frequency-selective ring detection, frequency tolerance.

interringmaxtime

ms

8000

Maximum length of an incoming ring period (on time + off time) that can elapse before the call is considered to be abandoned.

polaranswertime

ms

0

Wait time after going off-hook answering a call before the TCP starts detecting the loop current polarity reversal on far-end disconnect (if reversalmode = 2 or 3).

polardialtime

ms

0

Wait time after dialing before starting the loop current polarity reversal detection (if reversalmode = 1 or 3).

qualloopoff

ms

10

Minimum duration of loop current interruption before a hang up is recognized.

qualreversal

ms

200

Qualification time for loop current reversal event.

qualringoff

ms

100

For voltage-sensitive ring detection, the minimum duration of loss of detected voltage to be recognized as the end of a ringing signal.

qualringon

ms

6

For voltage-sensitive ring detection, the minimum duration of detected voltage to be recognized as the start of a ringing signal.

releaseguardtime

ms

1000

If the host places a call immediately after releasing a call, the line is not taken off-hook until this time has elapsed, to ensure that the CO considers the line idle.

To comply with CTR21 standards, do not modify GER parameter.

ringdetectmode

mask

1

Selects whether the ring detector is voltage-sensitive or frequency-selective:

0 - Voltage-sensitive

1 - Frequency-selective

ringsigmaxtime

ms

3000

Maximum duration of a detected incoming ringing signal before the ringing is considered to be too long.

ringsigmintime

ms

100

Minimum duration of a detected ring signal before the ring signal is considered valid.


Refer to LPS editable parameters for more information.