Message Waiting Indication - AudioCodes Mediant 1000B User Manual

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.
Note: The Call Waiting feature is applicable only to FXS/FXO interfaces.
26.8

Message Waiting Indication

The device supports Message Waiting Indication (MWI) according to IETF RFC 3842. The
device also supports subscribing to an MWI server (using SIP SUBSCRIBE messages).
For analog interfaces: The FXS device can accept a SIP MWI NOTIFY message that
indicates waiting messages or cleared messages. Users are informed of these messages
by a stutter dial tone. You can define the stutter and confirmation tones 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).
Note: For more information on IP voice mail configuration, refer to the IP Voice Mail
CPE Configuration Guide.
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 digital PSTN-based MWI features:

ISDN BRI: The device supports MWI for its BRI phones, 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 phone turns off.
This 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)
User's Manual
Mediant 1000B Gateway & SBC
422 Document #: LTRT-27034