AudioCodes Mediant 800 MSBG User Manual page 824

Parameter
Web: Play Ringback Tone to IP
EMS: Play Ring Back Tone To IP
[PlayRBTone2IP]
Web: Play Local RBT on ISDN
Transfer
EMS: Play RBT On ISDN
Transfer
[PlayRBTOnISDNTransfer]
SIP User's Manual
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.
Determines whether or not 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.
For digital modules: 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
doesn't play a ringback tone to IP and doesn't send 183 or
180+SDP responses.
This parameter can also be configured per IP Profile, using the
IPProfile parameter (see ''Configuring IP Profiles'' on page
143).
Determines whether the device plays a local ringback tone (RBT)
for ISDN's Two B Channel Transfer (TBCT), Release Line Trunk
(RLT), or Explicit Call Transfer (ECT) call transfers to the
originator when the second leg receives an ISDN Alerting or
Progress message.
[0] Don't Play (default).
824
Mediant 800 MSBG
Description
Document #: LTRT-12804