User's Manual 972 Document #: LTRT-10466
Mediant 500L MSBR
Parameter Description
(due to a previous 183 early media response or due to 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.
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.
Web: Play Ringback Tone to
Trunk
CLI: play-rbt-to-trk
[PlayRBTone2Trunk_x]
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 PI = 8
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