Installation & Operation Manual 698 Document # LTRT-92224
Mediant 8000
Parameter
Name
Type Provisioning
Type
Description
Play RB
Tone to IP
Enum
Disable, Enable
Instant Enables/disables play
ofringback tone to the IP side of
the call after SIP 183 session
progress response is sent.
If enabled and
EnableEarlyMedia=1, for IP-to-
Tel calls the gateway may play
a ringback tone to IP, according
to the following:
For CAS interfaces, the gateway
opens a voice channel, sends a
183+SDP response and plays a
Ringback tone to IP.
For ISDN interfaces, if a
Progress or an Alert message
with PI (1 or 8) is received from
the ISDN, the gateway opens a
voice channel, sends a
183+SDP or 180+SDP
response, but it doesn’t play a
Ringback tone to IP. If PI (1 or
8) is received from the ISDN,
the gateway assumes that
Ringback tone is played by the
ISDN Switch. Otherwise, the
fateway plays a Ringback tone
to IP after receiving an Alert
message from the ISDN. It
sends a 180+SDP response,
signaling to the originating party
to open a voice channel to hear
the played Ringback tone.
Notes:
To enable the gateway to
send a 183/180+SDP
responses, set
EnableEarlyMedia to 1.
If EnableDigitDelivery = 1,
the gateway doesn’t play a
Ringback tone to IP and
doesn’t send 183 or
180+SDP responses.
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