AudioCodes Mediant 500 MSBR, Руководство пользователя

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User's Manual 1172 Document #: LTRT-10375
Mediant 500 MSBR
[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 receiving RTP packets. At this stage, if the
device receives additional 18x responses, it does not resume
playing the local ringback tone. Note that 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