AudioCodes Mediant 500 E-SBC, User Manual

Page: 650 / 920

User's Manual 650 Document #: LTRT-10437
Mediant 500 E-SBC
48.4 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:
Table 48-6: Supported X-Detect Event Types
Events Type Subtype Required Configuration
CPT SIT-NC
SIT-IC
SIT-VC
SIT-RO
Busy
Reorder
Ringtone
SITDetectorEnable = 1
UserDefinedToneDetectorEnable = 1
Notes:

Ensure that the CPT file is configured with the required tone
type.
FAX CED
(IsFaxUsed ≠ 0) or (IsFaxUsed = 0, and FaxTransportMode ≠ 0)
modem VxxModemTransportType = 3
PTT voice-start
voice-end
EnableDSPIPMDetectors = 1
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, using the parameters SITQ850Cause, SITQ850CauseForNC,
SITQ850CauseForIC, SITQ850CauseForVC, and SITQ850CauseForRO.