CHAPTER19 Coders and Profiles
Mediant 1000 Gateway & E-SBC | User's Manual
Parameter Description
â– [1] Enable = Plays a ringback tone after a SIP 183
session progress response is sent.
Note:
â– To enable the device to send a 183/180+SDP
responses, set the EnableEarlyMedia parameter to 1.
â– 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.
â– Digital interfaces: If the parameter is enabled and
EnableEarlyMedia is set to 1, the device plays a
ringback tone according to the following:
✔ CAS: The device opens a voice channel, sends a
183+SDP response, and then plays a ringback
tone to IP.
✔ ISDN: 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.
â– The corresponding global parameter is
PlayRBTone2IP.
'Progress Indicator to IP'
prog-ind-to-ip
[IpProfile_ProgressIndicator2IP]
Defines the Progress Indicator (PI) sent to the IP.
â– [-1] = (Default) Not configured:
✔ Analog: Default values are used (1 for FXO
interfaces and 0 for FXS interfaces).
✔ Digital ISDN: The PI received in ISDN Proceeding,
Progress, and Alerting messages is used, as
described in the options below.
â– [0] No PI =
✔ Analog: For IP-to-Tel calls, the device sends a 180
Ringing response to IP after placing a call to a
phone (FXS) or PBX (FXO).
✔ Digital: For IP-to-Tel calls, the device sends 180
Ringing response to the IP after receiving an ISDN
Alerting, or for CAS after placing a call to the
PBX/PSTN.
â– [1] PI = 1:
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