Plays a ringback tone to the Tel side only if a 180/183
response without SDP is received. If 180/183 with
SDP message is received, the device cuts through the
voice channel and doesn't play the 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
additional 18x responses, it does not resume playing the
local ringback tone.
Note: This parameter is applicable to the Gateway and IP-to-
IP applications.
Web: Play Ringback Tone to IP
EMS: Play Ring Back Tone To IP
[PlayRBTone2IP]
Determines whether the device plays a ringback tone to the
IP side for IP-to-Tel calls.
 [0] Don't Play = (Default) Ringback tone isn't played.
 [1] Play = Ringback tone is played after SIP 183 session
progress response is sent.
Notes:
 This parameter is applicable only to FXS interfaces.
 To enable the device to send a 183/180+SDP responses,
set the EnableEarlyMedia parameter to 1.
 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.
 This parameter can also be configured in an IP Profile.
Tone Index Table
Web: Tone Index Table
EMS: Analog Gateway Provisioning >
Tone Index
[ToneIndex]
This table parameter configures the Tone Index table, which
allows you to define distinctive ringing and call waiting tones
per FXS endpoint (or for a range of FXS endpoints).
The format of this parameter is as follows:
[ToneIndex]
FORMAT ToneIndex_Index = ToneIndex_FXSPort_First,
ToneIndex_FXSPort_Last, ToneIndex_SourcePrefix,
ToneIndex_DestinationPrefix, ToneIndex_PriorityIndex;
[\ToneIndex]
For example, the configuration below plays the tone Index #3
to FXS ports 1 and 2 if the source number prefix of the
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