AudioCodes Mediant 2000 User Manual Download

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Version 5.6

123

November 2008

SIP User's Manual

3. Web-Based Management

Parameter

Description

Enable Early Media

[EnableEarlyMedia]

Enables the device to send a 183 Session Progress response with SDP
(instead of 180 Ringing), allowing the media stream to be established prior
to the answering of the call.

[0]

Disable = Early Media is disabled (default).

[1]

Enable = Enables Early Media.

Sending a 183 response depends on the Progress Indicator (PI). It is sent
only if PI is set to 1 or 8 are received in Proceeding or Alert PRI messages.
For CAS devices, see the ProgressIndicator2IP parameter.

183 Message Behavior

[SIP183Behaviour]

Defines the ISDN message that is sent when the 183 Session Progress
message is received for IP-to-Tel calls.

[0]

Progress = The device sends a PROGRESS message (default).

[1]

Alert = The device sends an ALERT message (upon receipt of a 183

response) instead of an ISDN PROGRESS message.

Session-Expires Time

[SIPSessionExpires]

Determines the numerical value that is sent in the Session-Expires header
in the first INVITE request or response (if the call is answered).
The valid range is 1 to 86,400 sec. The default is 0 (i.e., the Session-
Expires header is disabled).

Minimum Session-
Expires

[MinSE]

Defines the time (in seconds) that is used in the Min-SE header. This
header defines the minimum time that the user agent refreshes the
session.
The valid range is 10 to 100,000. The default value is 90.

Session Expires
Method

[SessionExpiresMeth
od]

Determines the SIP method used for session-timer updates.

[0]

Re-INVITE = Uses Re-INVITE messages for session-timer updates

(default).

[1]

UPDATE = Uses UPDATE messages.

Notes:

The device can receive session-timer refreshes using both methods.

The UPDATE message used for session-timer is excluded from the
SDP body.

Asserted Identity Mode

[AssertedIdMode]

Determines whether P-Asserted-Identity or P-Preferred-Identity is used in
the generated INVITE request for Caller ID (or privacy).

[0]

Disabled = None (default)

[1]

Adding PAsserted Identity

[2]

Adding PPreferred Identity

The Asserted ID mode defines the header (P-Asserted-Identity or P-
Preferred-Identity) that is used in the generated INVITE request. The
header also depends on the calling Privacy (allowed or restricted).
The P-Asserted-Identity (or P-Preferred-Identity) headers are used to
present the originating party's Caller ID. The Caller ID is composed of a
Calling Number and (optionally) a Calling Name.
P-Asserted-Identity (or P-Preferred-Identity) headers are used together
with the Privacy header. If Caller ID is restricted (P-Asserted-Identity is not
sent), the Privacy header includes the value 'id' ('Privacy: id'). Otherwise,
for allowed Caller ID, 'Privacy: none' is used. If Caller ID is restricted
(received from PSTN), the From header is set to
<anonymous@anonymous.invalid>.
The logic for filling the calling party parameters is as follows: the SIP
header is selected first from which the calling party parameters are