SIP User's Manual 428 Document #: LTRT-65412
MP-11x & MP-124
4. To configure the Call Waiting indication tone cadence, modify the following
parameters: NumberOfWaitingIndications, WaitingBeepDuration and
TimeBetweenWaitingIndications.
5. To configure a delay interval before a Call Waiting Indication is played to the currently
busy port, use the parameter TimeBeforeWaitingIndication. This enables the caller to
hang up before disturbing the called party with Call Waiting Indications. Applicable only
to FXS modules.
Both the calling and called sides are supported by FXS interfaces; the FXO interfaces
support only the calling side.
To indicate Call Waiting, the device sends a 182 Call Queued response. The device
identifies Call Waiting when a 182 Call Queued response is received.
9.15.7 Message Waiting Indication
The device supports Message Waiting Indication (MWI) according to IETF <draft-ietf-
sipping-mwi-04.txt>, including SUBSCRIBE (to MWI server). The FXS device 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 the Product Reference Manual). If the MWI display is
configured, the number of waiting 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
device can subscribe to the MWI server per port (usually used on FXS) or per device (used
on FXO).
To configure MWI, use the following parameters:
îš„ EnableMWI
îš„ MWIServerIP
îš„ MWIAnalogLamp
îš„ MWIDisplay
îš„ StutterToneDuration
îš„ EnableMWISubscription
îš„ MWIExpirationTime
îš„ SubscribeRetryTime
îš„ SubscriptionMode
îš„ CallerIDType -- determines the standard for detection of MWI signals (or using the
Web interface, refer to Supplementary Services)
îš„ ETSIVMWITypeOneStandard (for a description, refer to Analog Telephony
Parameters)
îš„ BellcoreVMWITypeOneStandard (for a description, refer to Analog Telephony
Parameters)
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