Message Waiting Indication - AudioCodes Mediant 800B User Manual

User's Manual
Note:
25.8

Message Waiting Indication

The device supports Message Waiting Indication (MWI) according to IETF RFC 3842,
including SUBSCRIBE to an MWI server.
For analog interfaces: 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. 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).
Notes:
To configure MWI, use the following parameters:

EnableMWI

MWIServerIP, or MWISubscribeIPGroupID and ProxySet

MWIAnalogLamp

MWIDisplay

StutterToneDuration

EnableMWISubscription

MWIExpirationTime

SubscribeRetryTime

SubscriptionMode

CallerIDType (determines the standard for detection of MWI signals)

ETSIVMWITypeOneStandard

BellcoreVMWITypeOneStandard

VoiceMailInterface

EnableVMURI
The device supports the following MWI features for its digital PSTN interfaces:

For BRI interfaces: This feature provides support for MWI on BRI phones connected to
the device and using the Euro ISDN BRI variant. When this feature is activated and a
voice mail message is recorded to the mail box of a BRI extension, the softswitch
sends a notification to the device. In turn, the device notifies the BRI extension and a
red light flashes on the BRI extension's phone. Once the voice message is retrieved,
the MWI light on the BRI extension turns off. This feature is configured by setting the
VoiceMailInterface parameter to 8 ("ETSI") and enabled by the EnableMWI parameter.

Euro-ISDN MWI: The device supports Euro-ISDN MWI for IP-to-Tel calls. The device
interworks SIP MWI NOTIFY messages to Euro-ISDN Facility information element (IE)
Version 6.6
The Call Waiting feature is applicable only to FXS/FXO interfaces.

For more information on IP voice mail configuration, refer to the IP Voice
Mail CPE Configuration Guide.

For creating a CPT file using AudioCodes CPTWizard utility, refer to
CPTWizard Utility User's Guide.
‎ 2 5. Configuring Supplementary Services
359 Mediant 800B GW & E-SBC