# OPS non-editable parameters

The following NCC.X.ADI_OPS parameters 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/ Units | Default | Description
--- | --- | --- | ---
bitqualtime | ms | 10 | Qualification time for bit detector.
minringontime | ms | 100 | Minimum duration of incoming ring.
maxringontime | ms | 3000 | Maximum duration of incoming ring.
maxringofftime | ms | 8000 | Maximum duration of silence between rings.
ringstoincoming | count | 1 | Number of rings to detect for an incoming call: 0 - 1st ring begin 1 - 1st ring end n after n rings If caller ID is enabled (optionflags bit 3 = 1), the incoming call is reported after at least one ring.
dialtonewaittime | ms | 5000 | For outgoing calls, the maximum time to wait for initial dial tone.
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).
releaseguardtime | ms | 1000 | Minimum time between hang up and off hook.
CIDtype | integer | 0 | Type of caller ID protocol, if CID is enabled. 0 - BellCore CID protocol 1 - NTT Japan CID protocol 2 - ETSI CID protocol (V.23)
CIDmaxwaittime | ms | 5000 | Maximum time to wait for caller ID to arrive before concluding the caller has hung up (if CID is enabled).
CIDmaxalerttime | ms | 0 | Maximum duration of an alert signal in caller ID protocol (if CID is enabled).
CIDminmarktime | ms | 100 | Minimum duration of the mark signal of the caller ID protocol that is interpreted as such.
xferstring | string[6] | !; | Prefix dial string for call transfer. The string is dialed before dialing the number, where: ; (semicolon) - Wait for precise dial tone . (period) - Insert long pause in dialing , (comma) - Insert short pause in dialing ! (exclamation point) - Flash hook P - Switch to pulse dialing T - Switch to DTMF dialing M - Switch to MF dialing
connstring | string[6] | ! | String for transfer back to the connected state with the first call. It is dialed if a call transfer fails, where: ; (semicolon) - Wait for precise dial tone . (period) - Insert long pause in dialing , (comma) - Insert short pause in dialing ! (exclamation point) - Flash hook P - Switch to pulse dialing T - Switch to DTMF dialing M - Switch to MF dialing
connectbacktime | ms | 100 | Time to wait after sending transfer back hookflash if the PBX was playing busy.
waitdialnodialtone | ms | 500 | Time to wait to dial if no dialtone detection is required.

The following parameters are reserved for internal use:

- ringsignalontime

- ringsignalofftime

- numdigits

- alarmsonqualtime

- alarmsoffqualtime

Refer to OPS editable parameters for more information.