AudioCodes Mediant 800B User Manual page 987

User's Manual
Parameter
Web: Play Ringback Tone to
Trunk
CLI: play-rbt-to-trk
[PlayRBTone2Trunk_x]
Version 6.8
an SDP in the current 180 response), the device configured
for ISDN / CAS doesn't play the ringback tone; PI = 8 is
sent in an ISDN Alert message (unless the
ProgressIndicator2ISDN_x parameter is configured
differently). If a 180 response is received, but the 'early
media' voice channel is not opened, the device configured
for CAS plays a ringback tone to the PSTN. The device
configured for ISDN operates according to the
LocalISDNRBSource parameter:
1) If LocalISDNRBSource is set to 1, the device plays a
ringback tone and sends an ISDN Alert with PI = 8 to the
ISDN (unless the ProgressIndicator2ISDN_x parameter is
configured differently).
2) If LocalISDNRBSource is set to 0, the device doesn't
play a ringback tone. No PI is sent in the ISDN Alert
message (unless the ProgressIndicator2ISDN_x parameter
is configured differently). In this case, the PBX / PSTN plays
a ringback tone to the originating terminal. Note that the
receipt of a 183 response results in an ISDN Progress
message (unless SIP183Behaviour is set to 1). If
SIP183Behaviour is set to 1 (183 is handled the same way
as a 180 + SDP), the device sends an Alert message with
PI = 8, without playing a ringback tone.

[3] Play Local Until Remote Media Arrive = Plays a ringback
tone 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 ringback tone if there are no prior received RTP packets.
The device stops playing the local ringback tone 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 ringback tone. Note that for ISDN trunks, this option is
applicable only if the LocalISDNRBSource parameter is set to 1.
Note: This parameter is applicable to the Gateway and IP-to-IP
applications.
Determines the playing method of the ringback tone to the trunk
side, per trunk.

[-1] Not configured = (Default) The settings of the
PlayRBTone2Tel parameter is used.

[0] Don't Play = When the device is configured for ISDN / CAS,
it doesn't play a ringback tone. No Progress Indicator (PI) is
sent to the ISDN unless the ProgressIndicator2ISDN_x
parameter is configured differently.

[1] Play on Local = When the device is configured for CAS, it
plays a local ringback tone to the PSTN upon receipt of a SIP
180 Ringing response (with or without SDP). Note that the
receipt of a SIP 183 response does not cause the device
configured for CAS to play a ringback tone (unless the
SIP183Behaviour parameter is set to 1).
When the device is configured for ISDN, it operates according to
the LocalISDNRBSource parameter, as follows:

If the device receives a SIP 180 Ringing response (with or
without SDP) and the LocalISDNRBSource parameter is set
to 1, it plays a ringback tone and sends an ISDN Alert with
987
57. Configuration Parameters Reference
Description
Mediant 800B Gateway and E-SBC