# R15 non-editable parameters

The following NCC.X.ADI_R15 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 | Type/ Unit | Default | Description
--- | --- | --- | ---
qualtime | ms | 20 | Qualification time for bit changes.
waitbegintime | ms | 60 | Delay before starting to play the forward and backward tones.
Outbound timers
seizetime | ms | 400 | Maximum time to receive the seizure acknowledge.
waitbacksignaltime | ms | 4000 | Maximum time to receive a backward request.
pausefrstdigittime | ms | 300 | Initial wait before dialing the first decadic pulse.
interdigittime | ms | 750 | Time between two trains of pulses while dialing with decadic pulses.
confirmanswertime | ms | 275 | Timeout for differentiating answer versus ANI request that is the same line code but accompanied by a 500 Hz tone.
Inbound timers
waitfrwdsignaltime | ms | 350 | Maximum time to receive a forward signal.
waitfrwddeksignaltime | ms | 40000 | Maximum time to receive a decadic digit.
inbinterdigittime | ms | 400 | Time to wait before deciding that a train of decadic pulses is over.
Inbound ANI detector timers
anitonetimeout | ms | 100 | Time to wait before deciding that the transmission of ANIs is over.
anirequesttimeout | ms | 1000 | Timeout to get the first ANI.
answersignalontime | ms | 500 | Duration of line signal AB-10 (answer) when requesting ANIs.
requestdelaytime | ms | 200 | Delay between A-12 and the ANI request line signal AB-10.
tonedelaytime | ms | 230 | Delay between signaling answer during the ANI request and sending the 500 Hz tone. This value has been optimized for use within the Russian network. It should be decreased for back-to-back testing.
Dialing control
toneontime | ms | 45 | Duration of the MF tone used to convey DID information (backward and forward).
toneofftime | ms | 40 | Silence between the MF tones used to convey DID information (backward and forward). Also used for echo cancellation.
pulseontime | ms | 50 | Outbound: Time a pulse should be ON while dialing with decadic pulses.
pulseofftime | ms | 50 | Outbound: Time a pulse should be OFF while dialing with decadic pulses.
anitoneontime | ms | 40 | Outbound: Duration of the MF tone used to convey ANI information.
toneslevel | IDU | 315 | Amplitude of MF (call setup) tones (forward and backward).
anirequestontime | ms | 120 | Duration of the 500 Hz tone during an ANI request.

The following parameters are reserved for internal use:

- alarmsonqualtime

- alarmsoffqualtime

Refer to R15 editable parameters for more information.