Event Notification Using X-Detect Header - AudioCodes Mediant 3000 User Manual

45.4

Event Notification using X-Detect Header

The device can notify a remote party of the occurrence (or detection) of certain events in
the media stream. The device detects events and notifies their occurrence, using the SIP
X-Detect message header and only when establishing a SIP dialog.
Note: This feature is applicable only to the Gateway application (not SBC).
The table below lists the supported event types (and subtypes) and the corresponding
device configurations that you need to do:
Events Type Subtype
AMD voice
automatic
silence
unknown
beep
CPT SIT-NC
SIT-IC
SIT-VC
SIT-RO
Busy
Reorder
Ringtone
beep
FAX CED
modem
PTT voice-start
voice-end
The device can detect and report the following Special Information Tones (SIT) types from
the PSTN:

SIT-NC (No Circuit found)

SIT-IC (Operator Intercept)

SIT-VC (Vacant Circuit - non-registered number)

SIT-RO (Reorder - System Busy)
There are additional three SIT tones that are detected as one of the above SIT tones:

The NC* SIT tone is detected as NC

The RO* SIT tone is detected as RO

The IO* SIT tone is detected as VC
The device can map these SIT tones to a Q.850 cause and then map them to SIP 5xx/4xx
responses,
SITQ850CauseForIC, SITQ850CauseForVC, and SITQ850CauseForRO.
User's Manual
Table 45-6: Supported X-Detect Event Types
EnableDSPIPMDetectors = 1
AMDTimeout = 2000 (msec)
For AMD beep detection, AMDBeepDetectionMode = 1 or 2
SITDetectorEnable = 1
UserDefinedToneDetectorEnable = 1
Notes:

Ensure that the CPT file is configured with the required tone
type.

On beep detection, a SIP INFO message is sent with type
AMD/CPT and subtype beep.

The beep detection must be started using regular X-detect
extension, with AMD or CPT request.
(IsFaxUsed ≠ 0) or (IsFaxUsed = 0, and FaxTransportMode ≠ 0)
VxxModemTransportType = 3
EnableDSPIPMDetectors = 1
using the parameters
686
Required Configuration
SITQ850Cause, SITQ850CauseForNC,
Document #: LTRT-89738
Mediant 3000