User's Manual
374
Document #: LTRT-65417
MP-11x & MP-124
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.
Table
36-5: 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
NC*
-
913.8
380
1370.6
380
1776.7
380
RO*
-
985.2
274
1370.6
380
1776.7
380
IO*
-
913.8
380
1428.5
274
1776.7
380
For example:
INFO sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP 10.33.45.65;branch=z9hG4bKac2042168670
Max-Forwards: 70
From: <sip:[email protected];user=phone>;tag=1c1915542705
To: <sip:[email protected];user=phone>;tag=WQJNIDDPCOKAPIDSCOTG
Call-ID: [email protected]
CSeq: 1 INFO
Contact: <sip:[email protected]>
Supported: em,timer,replaces,path,resource-priority
Content-Type: application/x-detect
Content-Length: 28
Type= CPT
SubType=
SIT-IC
The X-Detect event notification process is as follows:
1.
For IP-to-Tel or Tel-to-IP calls, the device receives a SIP request message (using the
X-Detect header) that the remote party wishes to detect events on the media stream.
For incoming (IP-to-Tel) calls, the request must be indicated in the initial INVITE and
responded to either in the 183 response (for early dialogs) or in the 200 OK response
(for confirmed dialogs).
Содержание MediaPack MP-112
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Страница 31: ...Part II Management Tools ...
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Страница 103: ...Part IV General VoIP Configuration ...
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