Version 7.2 1261 Mediant 800B Gateway & E-SBC
User's Manual 72. Configuration Parameters Reference
Parameter Description
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: The parameter is applicable only to the Gateway
application.
Play Ringback Tone to Trunk
configure voip > interface e1-t1|bri
> 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 (unless the ProgressIndicator2ISDN_x
parameter is configured differently).
If the LocalISDNRBSource parameter is set to 0, the
device doesn't play a ringback tone and an Alert
message without PI is sent to the ISDN. In this case, the
PBX / PSTN plays the ringback tone to the originating
terminal. Note that the receipt of a 183 response does
not cause the device to play a ringback tone; the device
sends a Progress message (unless SIP183Behaviour is
set to 1). If the SIP183Behaviour parameter is set to 1,
the 183 response is handled the same way as a 180
Ringing response.
[2] Prefer IP = Plays according to 'Early Media'. 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 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
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