User`s manual

SIP User's Manual 142 Document #: LTRT-83303
Mediant 1000 & Mediant 600
Parameter Description
Play Ringback Tone to IP
[PlayRBTone2IP]
Determines whether or not the device plays a ringback tone (RBT) to the
IP side of the call (IP-to-Tel calls).
 [0] Don't Play = Ringback tone isn't played (default).
 [1] Play = Ringback tone is played after SIP 183 session progress
response is sent.
For digital modules: If configured to 1 ('Play') and EnableEarlyMedia = 1,
the device plays a ringback tone according to the following:
 For CAS interfaces: the device opens a voice channel, sends a
183+SDP response, and then 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 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 Alert 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.
Notes:
 This parameter is applicable only to Mediant 1000 FXS interfaces.
 To enable the device to send a 183/180+SDP responses, set
EnableEarlyMedia to 1.
 If EnableDigitDelivery = 1, the device doesn't play a ringback tone to IP
and doesn't send 183 or 180+SDP responses.
Play Ringback Tone to
Tel
[PlayRBTone2Tel]
 Determines the method used to play a ringback tone to the Tel side. [0]
Don't Play = Ringback tone isn't played.
 [1] Play Local = Ringback tone is played to the Tel side of the call when
180/183 response is received.
 [2] Play According to Early Media = Ringback tone is played to the Tel
side of the call if no SDP is received in 180/183 responses. If 180/183
with SDP message is received, the device cuts through the voice
channel and doesn't play ringback tone (default).
Use Tgrp Information
[UseSIPTgrp]
Determines whether the SIP 'tgrp' parameter, which specifies the Trunk
Group to which the call belongs is used.
 [0] Disable = The 'tgrp' parameter isn't used (default).
 [1] Send Only = The Trunk Group number is added to the 'tgrp'
parameter value in the Contact header of outgoing SIP messages. If a
Trunk Group number is not associated with the call, the 'tgrp' parameter
isn't included. If a 'tgrp' value is specified in incoming messages, it is
ignored.
 [2] Send and Receive = The functionality of outgoing SIP messages is
identical to the functionality described in option (1). In addition, for
incoming SIP messages, if the Request-URI includes a 'tgrp' parameter,
the device routes the call according to that value (if possible). If the
Contact header includes a 'tgrp' parameter, it is copied to the
corresponding outgoing messages in that dialog.