AudioCodes Mediant 1000

User's Manual 420 Document #: LTRT-27045
Mediant 1000B Gateway & E-SBC
Parameter Description
Note:
 Digital: The inclusion of the SDP in the 18x response depends on
the ISDN Progress Indicator (PI). The SDP is sent only if PI is set
to 1 or 8 in the received Proceeding, Alerting, or Progress
messages. See also the ProgressIndicator2IP parameter, which if
set to 1 or 8, the device behaves as if it received the ISDN
messages with the PI.

CAS: See the ProgressIndicator2IP parameter.

ISDN: Sending a 183 response depends on the ISDN PI. It is
sent only if PI is set to 1 or 8 in the received Proceeding or
Alerting messages. Sending 183 response also depends on
the ReleaseIP2ISDNCallOnProgressWithCause parameter,
which must be set to any value other than 2.
 See also the IgnoreAlertAfterEarlyMedia parameter. The
parameter allows, for example, to interwork Alert with PI to SIP
183 with SDP instead of 180 with SDP.
 You can also configure early SIP 183 response immediately upon
the receipt of an INVITE, using the EnableEarly183 parameter.
 Analog: To send a 183 response, you must also set the
ProgressIndicator2IP parameter to 1. If set to 0, a 180 Ringing
response is sent.
 The corresponding global parameter is EnableEarlyMedia.
Early 183
enable-early-183
[IpProfile_EnableEarly183]
Enables the device to send SIP 183 responses with SDP to the IP
upon receipt of INVITE messages.
 [0] Disable (default)
 [1] Enable = By sending the 183 response, the device opens an
RTP channel before receiving the "progress" tone from the ISDN
side. The device sends RTP packets immediately upon receipt of
an ISDN Progress, Alerting with Progress indicator, or Connect
message according to the initial negotiation without sending the
183 response again, thereby saving response time and avoiding
early media clipping.
Note:
 The parameter is applicable only to IP-to-Tel ISDN calls, and
applies to all calls.
 To enable this feature, set the EnableEarlyMedia parameter to 1.
 When the BChannelNegotiation parameter is set to Preferred or
Any, the EnableEarly183 parameter is ignored and a SIP 183 is
not sent upon receipt of an INVITE. In such a case, you can set
the ProgressIndicator2IP parameter to 1 (PI = 1) for the device to
send a SIP 183 upon receipt of an ISDN Call Proceeding
message.
 The corresponding global parameter is EnableEarly183.
Early Answer Timeout
early-answer-timeout
[IpProfile_EarlyAnswerTimeou
t]
Defines the duration (in seconds) that the device waits for an ISDN
Connect message from the called party (Tel side), started from when
it sends a Setup message. If this timer expires, the call is answered
by sending a SIP 200 OK message (to the IP side).
The valid range is 0 to 2400. The default is 0 (i.e., disabled).
Note:
 The parameter is applicable only to digital interfaces.
 The corresponding global parameter is EarlyAnswerTimeout.