Message Waiting Indication; Call Termination On Mp-1Xx/Fxo - AudioCodes MediaPack MP-102 User Manual

only the calling side.
To indicate Call Waiting, the gateway sends a 182 - call queued response.
The gateway identifies a Waiting Call when a 182 (call queued response) is received.
8.4.6

Message Waiting Indication

Support for Message Waiting Indication (MWI) according to IETF draft-ietf-sipping-mwi-04.txt,
including SUBSCRIBE (to MWI server). MP-1xx/FXS gateways can accept an MWI Notify
message that indicates waiting messages or that the MWI is cleared. Users are informed of these
messages by a stutter dial tone. The stutter and confirmation tones are defined in the CPT file
(refer to Section
messages is also displayed. If the MWI lamp is configured, the phone's lamp (on a phone that is
equipped with an MWI lamp) is lit. The gateway can subscribe to the MWI server per port (usually
used on FXS) or per gateway (used on FXO).
To configure MWI set the following parameters:
•
EnableMWI
•
MWIServerIP
•
MWIAnalogLamp
•
MWIDisplay
•
StutterToneDuration
•
EnableMWISubscription
•
MWIExpirationTime
•
SubscribeRetryTime
•
SubscriptionMode
8.5

Call Termination on MP-1xx/FXO

The following five methods for call termination are supported by the MP-1xx/FXO. Note that the
disconnection methods used by the MP-1xx must be supported by the CO or PBX.
•
Detection of polarity reversal / current disconnect -
This is the recommended method. The call is immediately disconnected after polarity
reversal or current disconnect is detected on the Tel side (assuming the PBX / CO produces
this signal).
Relevant ini file parameters: EnableReversalPolarity, EnableCurrentDisconnect,
CurrentDisconnectDuration, CurrentDisconnectDefaultThreshold and
TimeToSampleAnalogLineVoltage.
•
Detection of Reorder / Busy tones -
The call is immediately disconnected after Reorder / Busy tone is detected on the Tel side
(assuming the PBX / CO produces this tone). This method requires the correct tone
frequencies and cadence to be defined in the Call Progress Tones file. If these frequencies
are not known, define them in the CPT file (the tone produced by the PBX / CO must be
recorded and its frequencies analyzed). This method is slightly less reliable than the
previous one. You can use the CPTWizaed (described in Section
analyze Call Progress Tones generated by any PBX or telephone network.
Relevant ini file parameters: TimeForReorderTone.
MP-1xx SIP User's Manual
7.1 on page 143). If the MWI display is configured, the number of waiting
156
MP-1xx SIP
F.1.3 on page 222) to
Document #: LTRT-65404