SIP User's Manual 412 Document #: LTRT-65412
MP-11x & MP-124
9.7 Event Notification using X-Detect Header
The device supports the sending of notifications to a remote party notifying the occurrence
(or detection) of certain events on the media stream. Event detection and notifications is
performed using the SIP X-Detect message header, and only when establishing a SIP
dialog.
For supporting some events, certain device configurations need to be performed. The table
below lists the support event types (and subtypes) and the corresponding device
configurations, if required:
Table 9-5: Supported X-Detect Event Types
Events Type Subtype Required Configuration
CPT SIT SITDetectorEnable = 1
UserDefinedToneDetectorEnable = 1
FAX
CED (IsFaxUsed ≠0) or (IsFaxUsed = 0, and
FaxTransportMode ≠0)
modem VxxModemTransportType = 3
PTT voice-start
voice-end
EnableDSPIPMDetectors = 1
The device reports the following Special Information Tones (SIT) types:
îš„ SIT-NC
îš„ SIT-IC
îš„ SIT-VC
îš„ SIT-RO
Table 9-6: Special Information Tones (SITs) Reported by the device
Special
Information
Tones (SITs)
Name
Description First Tone
Frequency
Duration
Second Tone
Frequency
Duration
Third Tone
Frequency
Duration
(Hz) (ms) (Hz) (ms) (Hz) (ms)
NC1
No circuit found 985.2 380 1428.5 380 1776.7 380
IC
Operator intercept 913.8 274 1370.6 274 1776.7 380
VC
Vacant circuit (non
registered number)
985.2 380 1370.6 274 1776.7 380
RO1
Reorder (system
busy)
913.8 274 1428.5 380 1776.7 380
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