MFS non-editable parameters

The following NCC.X.ADI_MFS parameters are country or network specific, and cannot be modified.

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

Unit

Default

Description

Compelled timers

timerT1

ms

10000

Specifies Timer T1, maximum time between the line seized and the first request from inbound.

timerT2

ms

20000

Specifies Timer T2, maximum time between the end of a confirmation tone and the beginning of the next information tone.

timerT3

ms

5000

Specifies Timer T3, maximum time of a whole compelled cycle, starting when a information tone is started and ending when the corresponding confirmation tone stops (from the point of view of the party sending the information).

timerT4

ms

5000

Specifies Timer T4, maximum time of a whole compelled cycle, starting when a information tone starts and ending when the corresponding confirmation is stopped (from the point of view of the party sending the confirmation).

timerT5

ms

90

Specifies Timer T5, overall maximum duration of the compelled sequence.

timerT6

ms

30

Specifies Timer T6, minimum time between end of transmission of a confirmation signal and beginning of transmission of the next information tone.

Line signaling timers

bitsqualtime

ms

20

Qualification time for bits signals.

releaseguardtime

ms

150

Minimum time of the release guard pulse (from inbound).

clearbacktime1

ms

100

Release guard recognition time if inbound clears first.

clearbacktime2

ms

200

Release guard recognition time if outbound clears first.

answertime

count

60

Time in seconds the outbound waits for the inbound to answer, after the end of register signaling if the call has been accepted.

Compelled tones

Tones sent by the PSTN in Group A:

tnGAPSTNsendallDID

mask

0xD

Send all DID digits (D).

tnGAPSTNsendallANI

mask

0xC

Send all ANI digits (C).

tnGAPSTNswitchtoG2

mask

0x8

Switch to Group II (8).

tnGAPSTNsendCallCategory

mask

0x38CD

Send the call category (3).

Tones sent to signify various error conditions:

tnCongestionGroupA

mask

0xA

Congestion in Group A (A).

tnANInotavailable

mask

0xF

ANI not available (F).

tnCongestionGroupB

mask

0x2

Congestion in Group B (2).

Backward Group B tones (in either direction):

tnGBlinefree

mask

0x1

Line free, billing (1).

tnGBlinebusy

mask

0x4

Line busy (4).

tnGBunallocatednumber

mask

0x8

Unallocated number (8).

tnGBendofselection

mask

0x9

End of selection - line status unknown - call progress tone follows (9).

Backward Group A tones from the CPE:

tnGACPEsenddigitGBC

mask

0x9

Send Digit Group BC (4).

tnGACPEsendallANI

mask

0x4

Send all ANI digits (2).

tnGACPEswitchtoGII

mask

0x2

Switchover to Group B (8).

tndefaultoutcategory

mask

0x8

Default outbound category (2): external call, billing by line.

compelledtonelevel

IDU

330

Amplitude of compelled tones.

congestiontones

count

3

Tones in the fast busy cycle.

congestionofftime2

ms

600

Duration of the interval between congestion tones.

alarmsonqualtime

ms

500

Qualification time for trunk alarms (time to wait after the commencement of a trunk alarm before the TCP is notified).

alarmsoffqualtime

ms

400

Qualification time for trunk alarm end (time to wait after a trunk alarm state ended before the TCP is notified).


Refer to MFS editable parameters for more information.