AudioCodes Mediant 500L - Page 1188

User's Manual 1188 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
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
a ringback tone to the PSTN. The device configured for
ISDN operates according to the LocalISDNRBSource
parameter:

If LocalISDNRBSource is set to 1, the device plays a
ringback tone and sends an ISDN Alert with PI = 8 to
the ISDN (unless the ProgressIndicator2ISDN_x