AudioCodes Mediant 2000 User Manual page 565

SIP User's Manual
Parameter
Web: Play Ringback Tone to Tel
EMS: Play Ring Back Tone To Tel
[PlayRBTone2Tel]
Web: Play Ringback Tone to IP
EMS: Play Ring Back Tone To IP
[PlayRBTone2IP]
Version 6.4
Note: To enable the Cut-Through feature, use the
DigitalCutThrough (for CAS channels) parameter.
Enables the play of the ringback tone (RBT) to the Tel side
and determines the method for playing the RBT. It applies to
all trunks that are not configured by the parameter
PlayRBTone2Trunk. The description of this parameter is
similar to the parameter PlayRBTone2Trunk.

[0] Don't Play = RBT is not played.

[1] Play on Local = RBT is played to the Tel side of the call
when a SIP 180/183 response is received.

[2] Prefer IP = RBT is played to the Tel side only if a
180/183 response without SDP is received. If 180/183 with
SDP message is received, the device cuts through the
voice channel and doesn't play RBT (default).

[3] Play Local Until Remote Media Arrive = Plays the RBT
according to received media. The behaviour is similar to
[2]. If a SIP 180 response is received and the voice
channel is already open (due to a previous 183 early
media response or due to an SDP in the current 180
response), the device plays a local RBT if there are no
prior received RTP packets. The device stops playing the
local RBT as soon as it starts receiving RTP packets. At
this stage, if the device receives additional 18x responses,
it does not resume playing the local RBT.
Note: For ISDN trunks, this option is applicable only if the
parameter LocalISDNRBSource is set to 1.
Note: This parameter is also applicable to the IP2IP
application.
Determines whether the device plays a ringback tone (RBT)
to the IP side for IP-to-Tel calls.

[0] Don't Play = Ringback tone isn't played (default).

[1] Play = Ringback tone is played after SIP 183 session
progress response is sent.
If configured to 1 ('Play') and EnableEarlyMedia is set to 1,
the device plays a ringback tone according to the following:

For CAS interfaces: the device opens a voice channel,
sends a 183+SDP response, and then plays a ringback
tone to IP.

For ISDN interfaces: if a Progress or an Alerting message
with PI (1 or 8) is received from the ISDN, the device
opens a voice channel, sends a 183+SDP or 180+SDP
response, but doesn't play a ringback tone to IP. If PI (1 or
8) is received from the ISDN, the device assumes that
ringback tone is played by the ISDN switch. Otherwise, the
device plays a ringback tone to IP after receiving an
Alerting message from the ISDN. It sends a 180+SDP
response, signaling to the calling party to open a voice
channel to hear the played ringback tone.
Notes:

To enable the device to send a 183/180+SDP responses,
set the EnableEarlyMedia parameter to 1.

If the EnableDigitDelivery parameter is set to 1, the device
565
A. Configuration Parameters Reference
Description
November 2011