AudioCodes MediaPack 114 Bedienungsanleitung PDF herunterladen (Seite 332)

SIP User's Manual 332 Document #: LTRT-65411

MediaPack Series

The blind transfer call process is as follows:

• FXO receives a REFER request from the IP side

• FXO sends a hook-flash to the PBX, dials the digits (that are received in the

Refer-To header), and then drops the line (on-hook). Note that the time between

flash to dial is according to the WaitForDialTime parameter.

• PBX performs the transfer internally

 Hold / Transfer toward the IP side: The FXO device doesn't initiate hold / transfer as

a response to input from the Tel side. If the FXO receives a REFER request (with or

without replaces), it generates a new INVITE according to the Refer-To header.

7.5 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 X-Detect SIP 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 7-1: 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 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). For outgoing calls (Tel-to-IP), the request may be received in

the 183 (for early dialogs) and responded to in the PRACK, or received in the 200 OK

(for confirmed dialogs) and responded to in the ACK.

2. Once the device receives such a request, it sends a SIP response message (using the

X-Detect header) to the remote party, listing all supported events that can be detected.

The absence of the X-Detect header indicates that no detections are available.

3. Each time the device detects a supported event, the event is notified to the remote

party, by sending an INFO message with the following message body:

• Content-Type: application/X-DETECT

• Type = [CPT | FAX | PTT…]

• Subtype = xxx (according to the defined subtypes of each type)

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